2360 lines
106 KiB
PHP
2360 lines
106 KiB
PHP
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<?php
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/** PHPExcel root directory */
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if (!defined('PHPEXCEL_ROOT')) {
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/**
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* @ignore
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*/
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define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
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require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
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}
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/** FINANCIAL_MAX_ITERATIONS */
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define('FINANCIAL_MAX_ITERATIONS', 128);
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/** FINANCIAL_PRECISION */
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define('FINANCIAL_PRECISION', 1.0e-08);
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/**
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* PHPExcel_Calculation_Financial
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*
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* Copyright (c) 2006 - 2015 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel_Calculation
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* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version ##VERSION##, ##DATE##
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*/
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class PHPExcel_Calculation_Financial
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{
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/**
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* isLastDayOfMonth
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*
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* Returns a boolean TRUE/FALSE indicating if this date is the last date of the month
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*
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* @param DateTime $testDate The date for testing
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* @return boolean
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*/
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private static function isLastDayOfMonth($testDate)
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{
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return ($testDate->format('d') == $testDate->format('t'));
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}
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/**
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* isFirstDayOfMonth
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*
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* Returns a boolean TRUE/FALSE indicating if this date is the first date of the month
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*
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* @param DateTime $testDate The date for testing
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* @return boolean
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*/
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private static function isFirstDayOfMonth($testDate)
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{
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return ($testDate->format('d') == 1);
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}
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private static function couponFirstPeriodDate($settlement, $maturity, $frequency, $next)
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{
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$months = 12 / $frequency;
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$result = PHPExcel_Shared_Date::ExcelToPHPObject($maturity);
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$eom = self::isLastDayOfMonth($result);
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while ($settlement < PHPExcel_Shared_Date::PHPToExcel($result)) {
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$result->modify('-'.$months.' months');
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}
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if ($next) {
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$result->modify('+'.$months.' months');
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}
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if ($eom) {
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$result->modify('-1 day');
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}
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return PHPExcel_Shared_Date::PHPToExcel($result);
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}
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private static function isValidFrequency($frequency)
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{
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if (($frequency == 1) || ($frequency == 2) || ($frequency == 4)) {
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return true;
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}
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if ((PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) &&
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(($frequency == 6) || ($frequency == 12))) {
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return true;
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}
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return false;
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}
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/**
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* daysPerYear
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*
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* Returns the number of days in a specified year, as defined by the "basis" value
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*
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* @param integer $year The year against which we're testing
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* @param integer $basis The type of day count:
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* 0 or omitted US (NASD) 360
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* 1 Actual (365 or 366 in a leap year)
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* 2 360
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* 3 365
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* 4 European 360
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* @return integer
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*/
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private static function daysPerYear($year, $basis = 0)
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{
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switch ($basis) {
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case 0:
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case 2:
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case 4:
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$daysPerYear = 360;
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break;
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case 3:
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$daysPerYear = 365;
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break;
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case 1:
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$daysPerYear = (PHPExcel_Calculation_DateTime::isLeapYear($year)) ? 366 : 365;
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break;
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default:
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return PHPExcel_Calculation_Functions::NaN();
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}
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return $daysPerYear;
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}
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private static function interestAndPrincipal($rate = 0, $per = 0, $nper = 0, $pv = 0, $fv = 0, $type = 0)
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{
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$pmt = self::PMT($rate, $nper, $pv, $fv, $type);
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$capital = $pv;
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for ($i = 1; $i<= $per; ++$i) {
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$interest = ($type && $i == 1) ? 0 : -$capital * $rate;
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$principal = $pmt - $interest;
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$capital += $principal;
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}
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return array($interest, $principal);
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}
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/**
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* ACCRINT
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*
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* Returns the accrued interest for a security that pays periodic interest.
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*
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* Excel Function:
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* ACCRINT(issue,firstinterest,settlement,rate,par,frequency[,basis])
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*
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* @access public
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* @category Financial Functions
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* @param mixed $issue The security's issue date.
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* @param mixed $firstinterest The security's first interest date.
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* @param mixed $settlement The security's settlement date.
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* The security settlement date is the date after the issue date
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* when the security is traded to the buyer.
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* @param float $rate The security's annual coupon rate.
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* @param float $par The security's par value.
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* If you omit par, ACCRINT uses $1,000.
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* @param integer $frequency the number of coupon payments per year.
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* Valid frequency values are:
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* 1 Annual
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* 2 Semi-Annual
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* 4 Quarterly
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* If working in Gnumeric Mode, the following frequency options are
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* also available
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* 6 Bimonthly
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* 12 Monthly
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* @param integer $basis The type of day count to use.
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* 0 or omitted US (NASD) 30/360
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* 1 Actual/actual
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* 2 Actual/360
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* 3 Actual/365
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* 4 European 30/360
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* @return float
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*/
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public static function ACCRINT($issue, $firstinterest, $settlement, $rate, $par = 1000, $frequency = 1, $basis = 0)
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{
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$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
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$firstinterest = PHPExcel_Calculation_Functions::flattenSingleValue($firstinterest);
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
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$par = (is_null($par)) ? 1000 : PHPExcel_Calculation_Functions::flattenSingleValue($par);
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$frequency = (is_null($frequency)) ? 1 : PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
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$basis = (is_null($basis)) ? 0 : PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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// Validate
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if ((is_numeric($rate)) && (is_numeric($par))) {
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$rate = (float) $rate;
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$par = (float) $par;
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if (($rate <= 0) || ($par <= 0)) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
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if (!is_numeric($daysBetweenIssueAndSettlement)) {
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// return date error
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return $daysBetweenIssueAndSettlement;
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}
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return $par * $rate * $daysBetweenIssueAndSettlement;
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}
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return PHPExcel_Calculation_Functions::VALUE();
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}
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/**
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* ACCRINTM
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*
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* Returns the accrued interest for a security that pays interest at maturity.
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*
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* Excel Function:
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* ACCRINTM(issue,settlement,rate[,par[,basis]])
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*
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* @access public
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* @category Financial Functions
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* @param mixed issue The security's issue date.
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* @param mixed settlement The security's settlement (or maturity) date.
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* @param float rate The security's annual coupon rate.
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* @param float par The security's par value.
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* If you omit par, ACCRINT uses $1,000.
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* @param integer basis The type of day count to use.
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* 0 or omitted US (NASD) 30/360
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* 1 Actual/actual
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* 2 Actual/360
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* 3 Actual/365
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* 4 European 30/360
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* @return float
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*/
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public static function ACCRINTM($issue, $settlement, $rate, $par = 1000, $basis = 0)
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{
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$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
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$par = (is_null($par)) ? 1000 : PHPExcel_Calculation_Functions::flattenSingleValue($par);
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$basis = (is_null($basis)) ? 0 : PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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// Validate
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if ((is_numeric($rate)) && (is_numeric($par))) {
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$rate = (float) $rate;
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$par = (float) $par;
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if (($rate <= 0) || ($par <= 0)) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
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if (!is_numeric($daysBetweenIssueAndSettlement)) {
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// return date error
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return $daysBetweenIssueAndSettlement;
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}
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return $par * $rate * $daysBetweenIssueAndSettlement;
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}
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return PHPExcel_Calculation_Functions::VALUE();
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}
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/**
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* AMORDEGRC
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*
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* Returns the depreciation for each accounting period.
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* This function is provided for the French accounting system. If an asset is purchased in
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* the middle of the accounting period, the prorated depreciation is taken into account.
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* The function is similar to AMORLINC, except that a depreciation coefficient is applied in
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* the calculation depending on the life of the assets.
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* This function will return the depreciation until the last period of the life of the assets
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* or until the cumulated value of depreciation is greater than the cost of the assets minus
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* the salvage value.
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*
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* Excel Function:
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* AMORDEGRC(cost,purchased,firstPeriod,salvage,period,rate[,basis])
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*
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* @access public
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* @category Financial Functions
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* @param float cost The cost of the asset.
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* @param mixed purchased Date of the purchase of the asset.
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* @param mixed firstPeriod Date of the end of the first period.
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* @param mixed salvage The salvage value at the end of the life of the asset.
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* @param float period The period.
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* @param float rate Rate of depreciation.
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* @param integer basis The type of day count to use.
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* 0 or omitted US (NASD) 30/360
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* 1 Actual/actual
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* 2 Actual/360
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* 3 Actual/365
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* 4 European 30/360
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* @return float
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*/
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public static function AMORDEGRC($cost, $purchased, $firstPeriod, $salvage, $period, $rate, $basis = 0)
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{
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$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
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$purchased = PHPExcel_Calculation_Functions::flattenSingleValue($purchased);
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$firstPeriod = PHPExcel_Calculation_Functions::flattenSingleValue($firstPeriod);
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$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
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$period = floor(PHPExcel_Calculation_Functions::flattenSingleValue($period));
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$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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// The depreciation coefficients are:
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// Life of assets (1/rate) Depreciation coefficient
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// Less than 3 years 1
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// Between 3 and 4 years 1.5
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// Between 5 and 6 years 2
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// More than 6 years 2.5
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$fUsePer = 1.0 / $rate;
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if ($fUsePer < 3.0) {
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$amortiseCoeff = 1.0;
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} elseif ($fUsePer < 5.0) {
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$amortiseCoeff = 1.5;
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} elseif ($fUsePer <= 6.0) {
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$amortiseCoeff = 2.0;
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} else {
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$amortiseCoeff = 2.5;
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}
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$rate *= $amortiseCoeff;
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$fNRate = round(PHPExcel_Calculation_DateTime::YEARFRAC($purchased, $firstPeriod, $basis) * $rate * $cost, 0);
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$cost -= $fNRate;
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$fRest = $cost - $salvage;
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for ($n = 0; $n < $period; ++$n) {
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$fNRate = round($rate * $cost, 0);
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$fRest -= $fNRate;
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if ($fRest < 0.0) {
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switch ($period - $n) {
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case 0:
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case 1:
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return round($cost * 0.5, 0);
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default:
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return 0.0;
|
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}
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}
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$cost -= $fNRate;
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}
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return $fNRate;
|
||
|
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}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* AMORLINC
|
||
|
|
*
|
||
|
|
* Returns the depreciation for each accounting period.
|
||
|
|
* This function is provided for the French accounting system. If an asset is purchased in
|
||
|
|
* the middle of the accounting period, the prorated depreciation is taken into account.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* AMORLINC(cost,purchased,firstPeriod,salvage,period,rate[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float cost The cost of the asset.
|
||
|
|
* @param mixed purchased Date of the purchase of the asset.
|
||
|
|
* @param mixed firstPeriod Date of the end of the first period.
|
||
|
|
* @param mixed salvage The salvage value at the end of the life of the asset.
|
||
|
|
* @param float period The period.
|
||
|
|
* @param float rate Rate of depreciation.
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function AMORLINC($cost, $purchased, $firstPeriod, $salvage, $period, $rate, $basis = 0)
|
||
|
|
{
|
||
|
|
$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
||
|
|
$purchased = PHPExcel_Calculation_Functions::flattenSingleValue($purchased);
|
||
|
|
$firstPeriod = PHPExcel_Calculation_Functions::flattenSingleValue($firstPeriod);
|
||
|
|
$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
||
|
|
$period = PHPExcel_Calculation_Functions::flattenSingleValue($period);
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
$fOneRate = $cost * $rate;
|
||
|
|
$fCostDelta = $cost - $salvage;
|
||
|
|
// Note, quirky variation for leap years on the YEARFRAC for this function
|
||
|
|
$purchasedYear = PHPExcel_Calculation_DateTime::YEAR($purchased);
|
||
|
|
$yearFrac = PHPExcel_Calculation_DateTime::YEARFRAC($purchased, $firstPeriod, $basis);
|
||
|
|
|
||
|
|
if (($basis == 1) && ($yearFrac < 1) && (PHPExcel_Calculation_DateTime::isLeapYear($purchasedYear))) {
|
||
|
|
$yearFrac *= 365 / 366;
|
||
|
|
}
|
||
|
|
|
||
|
|
$f0Rate = $yearFrac * $rate * $cost;
|
||
|
|
$nNumOfFullPeriods = intval(($cost - $salvage - $f0Rate) / $fOneRate);
|
||
|
|
|
||
|
|
if ($period == 0) {
|
||
|
|
return $f0Rate;
|
||
|
|
} elseif ($period <= $nNumOfFullPeriods) {
|
||
|
|
return $fOneRate;
|
||
|
|
} elseif ($period == ($nNumOfFullPeriods + 1)) {
|
||
|
|
return ($fCostDelta - $fOneRate * $nNumOfFullPeriods - $f0Rate);
|
||
|
|
} else {
|
||
|
|
return 0.0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* COUPDAYBS
|
||
|
|
*
|
||
|
|
* Returns the number of days from the beginning of the coupon period to the settlement date.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* COUPDAYBS(settlement,maturity,frequency[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue
|
||
|
|
* date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed frequency the number of coupon payments per year.
|
||
|
|
* Valid frequency values are:
|
||
|
|
* 1 Annual
|
||
|
|
* 2 Semi-Annual
|
||
|
|
* 4 Quarterly
|
||
|
|
* If working in Gnumeric Mode, the following frequency options are
|
||
|
|
* also available
|
||
|
|
* 6 Bimonthly
|
||
|
|
* 12 Monthly
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function COUPDAYBS($settlement, $maturity, $frequency, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::getDateValue($settlement))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($settlement > $maturity) ||
|
||
|
|
(!self::isValidFrequency($frequency)) ||
|
||
|
|
(($basis < 0) || ($basis > 4))) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
$daysPerYear = self::daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement), $basis);
|
||
|
|
$prev = self::couponFirstPeriodDate($settlement, $maturity, $frequency, false);
|
||
|
|
|
||
|
|
return PHPExcel_Calculation_DateTime::YEARFRAC($prev, $settlement, $basis) * $daysPerYear;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* COUPDAYS
|
||
|
|
*
|
||
|
|
* Returns the number of days in the coupon period that contains the settlement date.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* COUPDAYS(settlement,maturity,frequency[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue
|
||
|
|
* date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed frequency the number of coupon payments per year.
|
||
|
|
* Valid frequency values are:
|
||
|
|
* 1 Annual
|
||
|
|
* 2 Semi-Annual
|
||
|
|
* 4 Quarterly
|
||
|
|
* If working in Gnumeric Mode, the following frequency options are
|
||
|
|
* also available
|
||
|
|
* 6 Bimonthly
|
||
|
|
* 12 Monthly
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function COUPDAYS($settlement, $maturity, $frequency, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::getDateValue($settlement))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($settlement > $maturity) ||
|
||
|
|
(!self::isValidFrequency($frequency)) ||
|
||
|
|
(($basis < 0) || ($basis > 4))) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
switch ($basis) {
|
||
|
|
case 3:
|
||
|
|
// Actual/365
|
||
|
|
return 365 / $frequency;
|
||
|
|
case 1:
|
||
|
|
// Actual/actual
|
||
|
|
if ($frequency == 1) {
|
||
|
|
$daysPerYear = self::daysPerYear(PHPExcel_Calculation_DateTime::YEAR($maturity), $basis);
|
||
|
|
return ($daysPerYear / $frequency);
|
||
|
|
}
|
||
|
|
$prev = self::couponFirstPeriodDate($settlement, $maturity, $frequency, false);
|
||
|
|
$next = self::couponFirstPeriodDate($settlement, $maturity, $frequency, true);
|
||
|
|
return ($next - $prev);
|
||
|
|
default:
|
||
|
|
// US (NASD) 30/360, Actual/360 or European 30/360
|
||
|
|
return 360 / $frequency;
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* COUPDAYSNC
|
||
|
|
*
|
||
|
|
* Returns the number of days from the settlement date to the next coupon date.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* COUPDAYSNC(settlement,maturity,frequency[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue
|
||
|
|
* date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed frequency the number of coupon payments per year.
|
||
|
|
* Valid frequency values are:
|
||
|
|
* 1 Annual
|
||
|
|
* 2 Semi-Annual
|
||
|
|
* 4 Quarterly
|
||
|
|
* If working in Gnumeric Mode, the following frequency options are
|
||
|
|
* also available
|
||
|
|
* 6 Bimonthly
|
||
|
|
* 12 Monthly
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function COUPDAYSNC($settlement, $maturity, $frequency, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::getDateValue($settlement))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($settlement > $maturity) ||
|
||
|
|
(!self::isValidFrequency($frequency)) ||
|
||
|
|
(($basis < 0) || ($basis > 4))) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
$daysPerYear = self::daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement), $basis);
|
||
|
|
$next = self::couponFirstPeriodDate($settlement, $maturity, $frequency, true);
|
||
|
|
|
||
|
|
return PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $next, $basis) * $daysPerYear;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* COUPNCD
|
||
|
|
*
|
||
|
|
* Returns the next coupon date after the settlement date.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* COUPNCD(settlement,maturity,frequency[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue
|
||
|
|
* date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed frequency the number of coupon payments per year.
|
||
|
|
* Valid frequency values are:
|
||
|
|
* 1 Annual
|
||
|
|
* 2 Semi-Annual
|
||
|
|
* 4 Quarterly
|
||
|
|
* If working in Gnumeric Mode, the following frequency options are
|
||
|
|
* also available
|
||
|
|
* 6 Bimonthly
|
||
|
|
* 12 Monthly
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return mixed Excel date/time serial value, PHP date/time serial value or PHP date/time object,
|
||
|
|
* depending on the value of the ReturnDateType flag
|
||
|
|
*/
|
||
|
|
public static function COUPNCD($settlement, $maturity, $frequency, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::getDateValue($settlement))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($settlement > $maturity) ||
|
||
|
|
(!self::isValidFrequency($frequency)) ||
|
||
|
|
(($basis < 0) || ($basis > 4))) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
return self::couponFirstPeriodDate($settlement, $maturity, $frequency, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* COUPNUM
|
||
|
|
*
|
||
|
|
* Returns the number of coupons payable between the settlement date and maturity date,
|
||
|
|
* rounded up to the nearest whole coupon.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* COUPNUM(settlement,maturity,frequency[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue
|
||
|
|
* date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed frequency the number of coupon payments per year.
|
||
|
|
* Valid frequency values are:
|
||
|
|
* 1 Annual
|
||
|
|
* 2 Semi-Annual
|
||
|
|
* 4 Quarterly
|
||
|
|
* If working in Gnumeric Mode, the following frequency options are
|
||
|
|
* also available
|
||
|
|
* 6 Bimonthly
|
||
|
|
* 12 Monthly
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return integer
|
||
|
|
*/
|
||
|
|
public static function COUPNUM($settlement, $maturity, $frequency, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::getDateValue($settlement))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($settlement > $maturity) ||
|
||
|
|
(!self::isValidFrequency($frequency)) ||
|
||
|
|
(($basis < 0) || ($basis > 4))) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
$settlement = self::couponFirstPeriodDate($settlement, $maturity, $frequency, true);
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis) * 365;
|
||
|
|
|
||
|
|
switch ($frequency) {
|
||
|
|
case 1: // annual payments
|
||
|
|
return ceil($daysBetweenSettlementAndMaturity / 360);
|
||
|
|
case 2: // half-yearly
|
||
|
|
return ceil($daysBetweenSettlementAndMaturity / 180);
|
||
|
|
case 4: // quarterly
|
||
|
|
return ceil($daysBetweenSettlementAndMaturity / 90);
|
||
|
|
case 6: // bimonthly
|
||
|
|
return ceil($daysBetweenSettlementAndMaturity / 60);
|
||
|
|
case 12: // monthly
|
||
|
|
return ceil($daysBetweenSettlementAndMaturity / 30);
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* COUPPCD
|
||
|
|
*
|
||
|
|
* Returns the previous coupon date before the settlement date.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* COUPPCD(settlement,maturity,frequency[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue
|
||
|
|
* date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed frequency the number of coupon payments per year.
|
||
|
|
* Valid frequency values are:
|
||
|
|
* 1 Annual
|
||
|
|
* 2 Semi-Annual
|
||
|
|
* 4 Quarterly
|
||
|
|
* If working in Gnumeric Mode, the following frequency options are
|
||
|
|
* also available
|
||
|
|
* 6 Bimonthly
|
||
|
|
* 12 Monthly
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return mixed Excel date/time serial value, PHP date/time serial value or PHP date/time object,
|
||
|
|
* depending on the value of the ReturnDateType flag
|
||
|
|
*/
|
||
|
|
public static function COUPPCD($settlement, $maturity, $frequency, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::getDateValue($settlement))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($settlement > $maturity) ||
|
||
|
|
(!self::isValidFrequency($frequency)) ||
|
||
|
|
(($basis < 0) || ($basis > 4))) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
return self::couponFirstPeriodDate($settlement, $maturity, $frequency, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* CUMIPMT
|
||
|
|
*
|
||
|
|
* Returns the cumulative interest paid on a loan between the start and end periods.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* CUMIPMT(rate,nper,pv,start,end[,type])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float $rate The Interest rate
|
||
|
|
* @param integer $nper The total number of payment periods
|
||
|
|
* @param float $pv Present Value
|
||
|
|
* @param integer $start The first period in the calculation.
|
||
|
|
* Payment periods are numbered beginning with 1.
|
||
|
|
* @param integer $end The last period in the calculation.
|
||
|
|
* @param integer $type A number 0 or 1 and indicates when payments are due:
|
||
|
|
* 0 or omitted At the end of the period.
|
||
|
|
* 1 At the beginning of the period.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function CUMIPMT($rate, $nper, $pv, $start, $end, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$start = (int) PHPExcel_Calculation_Functions::flattenSingleValue($start);
|
||
|
|
$end = (int) PHPExcel_Calculation_Functions::flattenSingleValue($end);
|
||
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
if ($start < 1 || $start > $end) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
$interest = 0;
|
||
|
|
for ($per = $start; $per <= $end; ++$per) {
|
||
|
|
$interest += self::IPMT($rate, $per, $nper, $pv, 0, $type);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $interest;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* CUMPRINC
|
||
|
|
*
|
||
|
|
* Returns the cumulative principal paid on a loan between the start and end periods.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* CUMPRINC(rate,nper,pv,start,end[,type])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float $rate The Interest rate
|
||
|
|
* @param integer $nper The total number of payment periods
|
||
|
|
* @param float $pv Present Value
|
||
|
|
* @param integer $start The first period in the calculation.
|
||
|
|
* Payment periods are numbered beginning with 1.
|
||
|
|
* @param integer $end The last period in the calculation.
|
||
|
|
* @param integer $type A number 0 or 1 and indicates when payments are due:
|
||
|
|
* 0 or omitted At the end of the period.
|
||
|
|
* 1 At the beginning of the period.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function CUMPRINC($rate, $nper, $pv, $start, $end, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$start = (int) PHPExcel_Calculation_Functions::flattenSingleValue($start);
|
||
|
|
$end = (int) PHPExcel_Calculation_Functions::flattenSingleValue($end);
|
||
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
if ($start < 1 || $start > $end) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
$principal = 0;
|
||
|
|
for ($per = $start; $per <= $end; ++$per) {
|
||
|
|
$principal += self::PPMT($rate, $per, $nper, $pv, 0, $type);
|
||
|
|
}
|
||
|
|
|
||
|
|
return $principal;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DB
|
||
|
|
*
|
||
|
|
* Returns the depreciation of an asset for a specified period using the
|
||
|
|
* fixed-declining balance method.
|
||
|
|
* This form of depreciation is used if you want to get a higher depreciation value
|
||
|
|
* at the beginning of the depreciation (as opposed to linear depreciation). The
|
||
|
|
* depreciation value is reduced with every depreciation period by the depreciation
|
||
|
|
* already deducted from the initial cost.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DB(cost,salvage,life,period[,month])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float cost Initial cost of the asset.
|
||
|
|
* @param float salvage Value at the end of the depreciation.
|
||
|
|
* (Sometimes called the salvage value of the asset)
|
||
|
|
* @param integer life Number of periods over which the asset is depreciated.
|
||
|
|
* (Sometimes called the useful life of the asset)
|
||
|
|
* @param integer period The period for which you want to calculate the
|
||
|
|
* depreciation. Period must use the same units as life.
|
||
|
|
* @param integer month Number of months in the first year. If month is omitted,
|
||
|
|
* it defaults to 12.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function DB($cost, $salvage, $life, $period, $month = 12)
|
||
|
|
{
|
||
|
|
$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
||
|
|
$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
||
|
|
$life = PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
||
|
|
$period = PHPExcel_Calculation_Functions::flattenSingleValue($period);
|
||
|
|
$month = PHPExcel_Calculation_Functions::flattenSingleValue($month);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life)) && (is_numeric($period)) && (is_numeric($month))) {
|
||
|
|
$cost = (float) $cost;
|
||
|
|
$salvage = (float) $salvage;
|
||
|
|
$life = (int) $life;
|
||
|
|
$period = (int) $period;
|
||
|
|
$month = (int) $month;
|
||
|
|
if ($cost == 0) {
|
||
|
|
return 0.0;
|
||
|
|
} elseif (($cost < 0) || (($salvage / $cost) < 0) || ($life <= 0) || ($period < 1) || ($month < 1)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
// Set Fixed Depreciation Rate
|
||
|
|
$fixedDepreciationRate = 1 - pow(($salvage / $cost), (1 / $life));
|
||
|
|
$fixedDepreciationRate = round($fixedDepreciationRate, 3);
|
||
|
|
|
||
|
|
// Loop through each period calculating the depreciation
|
||
|
|
$previousDepreciation = 0;
|
||
|
|
for ($per = 1; $per <= $period; ++$per) {
|
||
|
|
if ($per == 1) {
|
||
|
|
$depreciation = $cost * $fixedDepreciationRate * $month / 12;
|
||
|
|
} elseif ($per == ($life + 1)) {
|
||
|
|
$depreciation = ($cost - $previousDepreciation) * $fixedDepreciationRate * (12 - $month) / 12;
|
||
|
|
} else {
|
||
|
|
$depreciation = ($cost - $previousDepreciation) * $fixedDepreciationRate;
|
||
|
|
}
|
||
|
|
$previousDepreciation += $depreciation;
|
||
|
|
}
|
||
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
|
||
|
|
$depreciation = round($depreciation, 2);
|
||
|
|
}
|
||
|
|
return $depreciation;
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DDB
|
||
|
|
*
|
||
|
|
* Returns the depreciation of an asset for a specified period using the
|
||
|
|
* double-declining balance method or some other method you specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DDB(cost,salvage,life,period[,factor])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float cost Initial cost of the asset.
|
||
|
|
* @param float salvage Value at the end of the depreciation.
|
||
|
|
* (Sometimes called the salvage value of the asset)
|
||
|
|
* @param integer life Number of periods over which the asset is depreciated.
|
||
|
|
* (Sometimes called the useful life of the asset)
|
||
|
|
* @param integer period The period for which you want to calculate the
|
||
|
|
* depreciation. Period must use the same units as life.
|
||
|
|
* @param float factor The rate at which the balance declines.
|
||
|
|
* If factor is omitted, it is assumed to be 2 (the
|
||
|
|
* double-declining balance method).
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function DDB($cost, $salvage, $life, $period, $factor = 2.0)
|
||
|
|
{
|
||
|
|
$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
||
|
|
$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
||
|
|
$life = PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
||
|
|
$period = PHPExcel_Calculation_Functions::flattenSingleValue($period);
|
||
|
|
$factor = PHPExcel_Calculation_Functions::flattenSingleValue($factor);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life)) && (is_numeric($period)) && (is_numeric($factor))) {
|
||
|
|
$cost = (float) $cost;
|
||
|
|
$salvage = (float) $salvage;
|
||
|
|
$life = (int) $life;
|
||
|
|
$period = (int) $period;
|
||
|
|
$factor = (float) $factor;
|
||
|
|
if (($cost <= 0) || (($salvage / $cost) < 0) || ($life <= 0) || ($period < 1) || ($factor <= 0.0) || ($period > $life)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
// Set Fixed Depreciation Rate
|
||
|
|
$fixedDepreciationRate = 1 - pow(($salvage / $cost), (1 / $life));
|
||
|
|
$fixedDepreciationRate = round($fixedDepreciationRate, 3);
|
||
|
|
|
||
|
|
// Loop through each period calculating the depreciation
|
||
|
|
$previousDepreciation = 0;
|
||
|
|
for ($per = 1; $per <= $period; ++$per) {
|
||
|
|
$depreciation = min(($cost - $previousDepreciation) * ($factor / $life), ($cost - $salvage - $previousDepreciation));
|
||
|
|
$previousDepreciation += $depreciation;
|
||
|
|
}
|
||
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
|
||
|
|
$depreciation = round($depreciation, 2);
|
||
|
|
}
|
||
|
|
return $depreciation;
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DISC
|
||
|
|
*
|
||
|
|
* Returns the discount rate for a security.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DISC(settlement,maturity,price,redemption[,basis])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue
|
||
|
|
* date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param integer price The security's price per $100 face value.
|
||
|
|
* @param integer redemption The security's redemption value per $100 face value.
|
||
|
|
* @param integer basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function DISC($settlement, $maturity, $price, $redemption, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$price = PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
||
|
|
$redemption = PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
||
|
|
$basis = PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if ((is_numeric($price)) && (is_numeric($redemption)) && (is_numeric($basis))) {
|
||
|
|
$price = (float) $price;
|
||
|
|
$redemption = (float) $redemption;
|
||
|
|
$basis = (int) $basis;
|
||
|
|
if (($price <= 0) || ($redemption <= 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ((1 - $price / $redemption) / $daysBetweenSettlementAndMaturity);
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DOLLARDE
|
||
|
|
*
|
||
|
|
* Converts a dollar price expressed as an integer part and a fraction
|
||
|
|
* part into a dollar price expressed as a decimal number.
|
||
|
|
* Fractional dollar numbers are sometimes used for security prices.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DOLLARDE(fractional_dollar,fraction)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float $fractional_dollar Fractional Dollar
|
||
|
|
* @param integer $fraction Fraction
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function DOLLARDE($fractional_dollar = null, $fraction = 0)
|
||
|
|
{
|
||
|
|
$fractional_dollar = PHPExcel_Calculation_Functions::flattenSingleValue($fractional_dollar);
|
||
|
|
$fraction = (int)PHPExcel_Calculation_Functions::flattenSingleValue($fraction);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if (is_null($fractional_dollar) || $fraction < 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
if ($fraction == 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::DIV0();
|
||
|
|
}
|
||
|
|
|
||
|
|
$dollars = floor($fractional_dollar);
|
||
|
|
$cents = fmod($fractional_dollar, 1);
|
||
|
|
$cents /= $fraction;
|
||
|
|
$cents *= pow(10, ceil(log10($fraction)));
|
||
|
|
return $dollars + $cents;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DOLLARFR
|
||
|
|
*
|
||
|
|
* Converts a dollar price expressed as a decimal number into a dollar price
|
||
|
|
* expressed as a fraction.
|
||
|
|
* Fractional dollar numbers are sometimes used for security prices.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DOLLARFR(decimal_dollar,fraction)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float $decimal_dollar Decimal Dollar
|
||
|
|
* @param integer $fraction Fraction
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function DOLLARFR($decimal_dollar = null, $fraction = 0)
|
||
|
|
{
|
||
|
|
$decimal_dollar = PHPExcel_Calculation_Functions::flattenSingleValue($decimal_dollar);
|
||
|
|
$fraction = (int)PHPExcel_Calculation_Functions::flattenSingleValue($fraction);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if (is_null($decimal_dollar) || $fraction < 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
if ($fraction == 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::DIV0();
|
||
|
|
}
|
||
|
|
|
||
|
|
$dollars = floor($decimal_dollar);
|
||
|
|
$cents = fmod($decimal_dollar, 1);
|
||
|
|
$cents *= $fraction;
|
||
|
|
$cents *= pow(10, -ceil(log10($fraction)));
|
||
|
|
return $dollars + $cents;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* EFFECT
|
||
|
|
*
|
||
|
|
* Returns the effective interest rate given the nominal rate and the number of
|
||
|
|
* compounding payments per year.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* EFFECT(nominal_rate,npery)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float $nominal_rate Nominal interest rate
|
||
|
|
* @param integer $npery Number of compounding payments per year
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function EFFECT($nominal_rate = 0, $npery = 0)
|
||
|
|
{
|
||
|
|
$nominal_rate = PHPExcel_Calculation_Functions::flattenSingleValue($nominal_rate);
|
||
|
|
$npery = (int)PHPExcel_Calculation_Functions::flattenSingleValue($npery);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($nominal_rate <= 0 || $npery < 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
return pow((1 + $nominal_rate / $npery), $npery) - 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* FV
|
||
|
|
*
|
||
|
|
* Returns the Future Value of a cash flow with constant payments and interest rate (annuities).
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* FV(rate,nper,pmt[,pv[,type]])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float $rate The interest rate per period
|
||
|
|
* @param int $nper Total number of payment periods in an annuity
|
||
|
|
* @param float $pmt The payment made each period: it cannot change over the
|
||
|
|
* life of the annuity. Typically, pmt contains principal
|
||
|
|
* and interest but no other fees or taxes.
|
||
|
|
* @param float $pv Present Value, or the lump-sum amount that a series of
|
||
|
|
* future payments is worth right now.
|
||
|
|
* @param integer $type A number 0 or 1 and indicates when payments are due:
|
||
|
|
* 0 or omitted At the end of the period.
|
||
|
|
* 1 At the beginning of the period.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function FV($rate = 0, $nper = 0, $pmt = 0, $pv = 0, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$nper = PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
if (!is_null($rate) && $rate != 0) {
|
||
|
|
return -$pv * pow(1 + $rate, $nper) - $pmt * (1 + $rate * $type) * (pow(1 + $rate, $nper) - 1) / $rate;
|
||
|
|
}
|
||
|
|
return -$pv - $pmt * $nper;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* FVSCHEDULE
|
||
|
|
*
|
||
|
|
* Returns the future value of an initial principal after applying a series of compound interest rates.
|
||
|
|
* Use FVSCHEDULE to calculate the future value of an investment with a variable or adjustable rate.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* FVSCHEDULE(principal,schedule)
|
||
|
|
*
|
||
|
|
* @param float $principal The present value.
|
||
|
|
* @param float[] $schedule An array of interest rates to apply.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function FVSCHEDULE($principal, $schedule)
|
||
|
|
{
|
||
|
|
$principal = PHPExcel_Calculation_Functions::flattenSingleValue($principal);
|
||
|
|
$schedule = PHPExcel_Calculation_Functions::flattenArray($schedule);
|
||
|
|
|
||
|
|
foreach ($schedule as $rate) {
|
||
|
|
$principal *= 1 + $rate;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $principal;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* INTRATE
|
||
|
|
*
|
||
|
|
* Returns the interest rate for a fully invested security.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* INTRATE(settlement,maturity,investment,redemption[,basis])
|
||
|
|
*
|
||
|
|
* @param mixed $settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue date when the security is traded to the buyer.
|
||
|
|
* @param mixed $maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param integer $investment The amount invested in the security.
|
||
|
|
* @param integer $redemption The amount to be received at maturity.
|
||
|
|
* @param integer $basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function INTRATE($settlement, $maturity, $investment, $redemption, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$investment = PHPExcel_Calculation_Functions::flattenSingleValue($investment);
|
||
|
|
$redemption = PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
||
|
|
$basis = PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if ((is_numeric($investment)) && (is_numeric($redemption)) && (is_numeric($basis))) {
|
||
|
|
$investment = (float) $investment;
|
||
|
|
$redemption = (float) $redemption;
|
||
|
|
$basis = (int) $basis;
|
||
|
|
if (($investment <= 0) || ($redemption <= 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
|
||
|
|
return (($redemption / $investment) - 1) / ($daysBetweenSettlementAndMaturity);
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* IPMT
|
||
|
|
*
|
||
|
|
* Returns the interest payment for a given period for an investment based on periodic, constant payments and a constant interest rate.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* IPMT(rate,per,nper,pv[,fv][,type])
|
||
|
|
*
|
||
|
|
* @param float $rate Interest rate per period
|
||
|
|
* @param int $per Period for which we want to find the interest
|
||
|
|
* @param int $nper Number of periods
|
||
|
|
* @param float $pv Present Value
|
||
|
|
* @param float $fv Future Value
|
||
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function IPMT($rate, $per, $nper, $pv, $fv = 0, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$per = (int) PHPExcel_Calculation_Functions::flattenSingleValue($per);
|
||
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
||
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
if ($per <= 0 || $per > $nper) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
$interestAndPrincipal = self::interestAndPrincipal($rate, $per, $nper, $pv, $fv, $type);
|
||
|
|
return $interestAndPrincipal[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* IRR
|
||
|
|
*
|
||
|
|
* Returns the internal rate of return for a series of cash flows represented by the numbers in values.
|
||
|
|
* These cash flows do not have to be even, as they would be for an annuity. However, the cash flows must occur
|
||
|
|
* at regular intervals, such as monthly or annually. The internal rate of return is the interest rate received
|
||
|
|
* for an investment consisting of payments (negative values) and income (positive values) that occur at regular
|
||
|
|
* periods.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* IRR(values[,guess])
|
||
|
|
*
|
||
|
|
* @param float[] $values An array or a reference to cells that contain numbers for which you want
|
||
|
|
* to calculate the internal rate of return.
|
||
|
|
* Values must contain at least one positive value and one negative value to
|
||
|
|
* calculate the internal rate of return.
|
||
|
|
* @param float $guess A number that you guess is close to the result of IRR
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function IRR($values, $guess = 0.1)
|
||
|
|
{
|
||
|
|
if (!is_array($values)) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
||
|
|
$guess = PHPExcel_Calculation_Functions::flattenSingleValue($guess);
|
||
|
|
|
||
|
|
// create an initial range, with a root somewhere between 0 and guess
|
||
|
|
$x1 = 0.0;
|
||
|
|
$x2 = $guess;
|
||
|
|
$f1 = self::NPV($x1, $values);
|
||
|
|
$f2 = self::NPV($x2, $values);
|
||
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
||
|
|
if (($f1 * $f2) < 0.0) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (abs($f1) < abs($f2)) {
|
||
|
|
$f1 = self::NPV($x1 += 1.6 * ($x1 - $x2), $values);
|
||
|
|
} else {
|
||
|
|
$f2 = self::NPV($x2 += 1.6 * ($x2 - $x1), $values);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (($f1 * $f2) > 0.0) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
$f = self::NPV($x1, $values);
|
||
|
|
if ($f < 0.0) {
|
||
|
|
$rtb = $x1;
|
||
|
|
$dx = $x2 - $x1;
|
||
|
|
} else {
|
||
|
|
$rtb = $x2;
|
||
|
|
$dx = $x1 - $x2;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
||
|
|
$dx *= 0.5;
|
||
|
|
$x_mid = $rtb + $dx;
|
||
|
|
$f_mid = self::NPV($x_mid, $values);
|
||
|
|
if ($f_mid <= 0.0) {
|
||
|
|
$rtb = $x_mid;
|
||
|
|
}
|
||
|
|
if ((abs($f_mid) < FINANCIAL_PRECISION) || (abs($dx) < FINANCIAL_PRECISION)) {
|
||
|
|
return $x_mid;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ISPMT
|
||
|
|
*
|
||
|
|
* Returns the interest payment for an investment based on an interest rate and a constant payment schedule.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* =ISPMT(interest_rate, period, number_payments, PV)
|
||
|
|
*
|
||
|
|
* interest_rate is the interest rate for the investment
|
||
|
|
*
|
||
|
|
* period is the period to calculate the interest rate. It must be betweeen 1 and number_payments.
|
||
|
|
*
|
||
|
|
* number_payments is the number of payments for the annuity
|
||
|
|
*
|
||
|
|
* PV is the loan amount or present value of the payments
|
||
|
|
*/
|
||
|
|
public static function ISPMT()
|
||
|
|
{
|
||
|
|
// Return value
|
||
|
|
$returnValue = 0;
|
||
|
|
|
||
|
|
// Get the parameters
|
||
|
|
$aArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
|
||
|
|
$interestRate = array_shift($aArgs);
|
||
|
|
$period = array_shift($aArgs);
|
||
|
|
$numberPeriods = array_shift($aArgs);
|
||
|
|
$principleRemaining = array_shift($aArgs);
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
$principlePayment = ($principleRemaining * 1.0) / ($numberPeriods * 1.0);
|
||
|
|
for ($i=0; $i <= $period; ++$i) {
|
||
|
|
$returnValue = $interestRate * $principleRemaining * -1;
|
||
|
|
$principleRemaining -= $principlePayment;
|
||
|
|
// principle needs to be 0 after the last payment, don't let floating point screw it up
|
||
|
|
if ($i == $numberPeriods) {
|
||
|
|
$returnValue = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return($returnValue);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* MIRR
|
||
|
|
*
|
||
|
|
* Returns the modified internal rate of return for a series of periodic cash flows. MIRR considers both
|
||
|
|
* the cost of the investment and the interest received on reinvestment of cash.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* MIRR(values,finance_rate, reinvestment_rate)
|
||
|
|
*
|
||
|
|
* @param float[] $values An array or a reference to cells that contain a series of payments and
|
||
|
|
* income occurring at regular intervals.
|
||
|
|
* Payments are negative value, income is positive values.
|
||
|
|
* @param float $finance_rate The interest rate you pay on the money used in the cash flows
|
||
|
|
* @param float $reinvestment_rate The interest rate you receive on the cash flows as you reinvest them
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function MIRR($values, $finance_rate, $reinvestment_rate)
|
||
|
|
{
|
||
|
|
if (!is_array($values)) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
||
|
|
$finance_rate = PHPExcel_Calculation_Functions::flattenSingleValue($finance_rate);
|
||
|
|
$reinvestment_rate = PHPExcel_Calculation_Functions::flattenSingleValue($reinvestment_rate);
|
||
|
|
$n = count($values);
|
||
|
|
|
||
|
|
$rr = 1.0 + $reinvestment_rate;
|
||
|
|
$fr = 1.0 + $finance_rate;
|
||
|
|
|
||
|
|
$npv_pos = $npv_neg = 0.0;
|
||
|
|
foreach ($values as $i => $v) {
|
||
|
|
if ($v >= 0) {
|
||
|
|
$npv_pos += $v / pow($rr, $i);
|
||
|
|
} else {
|
||
|
|
$npv_neg += $v / pow($fr, $i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($npv_neg == 0) || ($npv_pos == 0) || ($reinvestment_rate <= -1)) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
$mirr = pow((-$npv_pos * pow($rr, $n))
|
||
|
|
/ ($npv_neg * ($rr)), (1.0 / ($n - 1))) - 1.0;
|
||
|
|
|
||
|
|
return (is_finite($mirr) ? $mirr : PHPExcel_Calculation_Functions::VALUE());
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* NOMINAL
|
||
|
|
*
|
||
|
|
* Returns the nominal interest rate given the effective rate and the number of compounding payments per year.
|
||
|
|
*
|
||
|
|
* @param float $effect_rate Effective interest rate
|
||
|
|
* @param int $npery Number of compounding payments per year
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function NOMINAL($effect_rate = 0, $npery = 0)
|
||
|
|
{
|
||
|
|
$effect_rate = PHPExcel_Calculation_Functions::flattenSingleValue($effect_rate);
|
||
|
|
$npery = (int)PHPExcel_Calculation_Functions::flattenSingleValue($npery);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($effect_rate <= 0 || $npery < 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
return $npery * (pow($effect_rate + 1, 1 / $npery) - 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* NPER
|
||
|
|
*
|
||
|
|
* Returns the number of periods for a cash flow with constant periodic payments (annuities), and interest rate.
|
||
|
|
*
|
||
|
|
* @param float $rate Interest rate per period
|
||
|
|
* @param int $pmt Periodic payment (annuity)
|
||
|
|
* @param float $pv Present Value
|
||
|
|
* @param float $fv Future Value
|
||
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function NPER($rate = 0, $pmt = 0, $pv = 0, $fv = 0, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
||
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
if (!is_null($rate) && $rate != 0) {
|
||
|
|
if ($pmt == 0 && $pv == 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
return log(($pmt * (1 + $rate * $type) / $rate - $fv) / ($pv + $pmt * (1 + $rate * $type) / $rate)) / log(1 + $rate);
|
||
|
|
}
|
||
|
|
if ($pmt == 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
return (-$pv -$fv) / $pmt;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* NPV
|
||
|
|
*
|
||
|
|
* Returns the Net Present Value of a cash flow series given a discount rate.
|
||
|
|
*
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function NPV()
|
||
|
|
{
|
||
|
|
// Return value
|
||
|
|
$returnValue = 0;
|
||
|
|
|
||
|
|
// Loop through arguments
|
||
|
|
$aArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
$rate = array_shift($aArgs);
|
||
|
|
for ($i = 1; $i <= count($aArgs); ++$i) {
|
||
|
|
// Is it a numeric value?
|
||
|
|
if (is_numeric($aArgs[$i - 1])) {
|
||
|
|
$returnValue += $aArgs[$i - 1] / pow(1 + $rate, $i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return $returnValue;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PMT
|
||
|
|
*
|
||
|
|
* Returns the constant payment (annuity) for a cash flow with a constant interest rate.
|
||
|
|
*
|
||
|
|
* @param float $rate Interest rate per period
|
||
|
|
* @param int $nper Number of periods
|
||
|
|
* @param float $pv Present Value
|
||
|
|
* @param float $fv Future Value
|
||
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function PMT($rate = 0, $nper = 0, $pv = 0, $fv = 0, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$nper = PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
||
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
if (!is_null($rate) && $rate != 0) {
|
||
|
|
return (-$fv - $pv * pow(1 + $rate, $nper)) / (1 + $rate * $type) / ((pow(1 + $rate, $nper) - 1) / $rate);
|
||
|
|
}
|
||
|
|
return (-$pv - $fv) / $nper;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PPMT
|
||
|
|
*
|
||
|
|
* Returns the interest payment for a given period for an investment based on periodic, constant payments and a constant interest rate.
|
||
|
|
*
|
||
|
|
* @param float $rate Interest rate per period
|
||
|
|
* @param int $per Period for which we want to find the interest
|
||
|
|
* @param int $nper Number of periods
|
||
|
|
* @param float $pv Present Value
|
||
|
|
* @param float $fv Future Value
|
||
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function PPMT($rate, $per, $nper, $pv, $fv = 0, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$per = (int) PHPExcel_Calculation_Functions::flattenSingleValue($per);
|
||
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
||
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
if ($per <= 0 || $per > $nper) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
$interestAndPrincipal = self::interestAndPrincipal($rate, $per, $nper, $pv, $fv, $type);
|
||
|
|
return $interestAndPrincipal[1];
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
public static function PRICE($settlement, $maturity, $rate, $yield, $redemption, $frequency, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$rate = (float) PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$yield = (float) PHPExcel_Calculation_Functions::flattenSingleValue($yield);
|
||
|
|
$redemption = (float) PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
||
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
||
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::getDateValue($settlement))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (($settlement > $maturity) ||
|
||
|
|
(!self::isValidFrequency($frequency)) ||
|
||
|
|
(($basis < 0) || ($basis > 4))) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
$dsc = self::COUPDAYSNC($settlement, $maturity, $frequency, $basis);
|
||
|
|
$e = self::COUPDAYS($settlement, $maturity, $frequency, $basis);
|
||
|
|
$n = self::COUPNUM($settlement, $maturity, $frequency, $basis);
|
||
|
|
$a = self::COUPDAYBS($settlement, $maturity, $frequency, $basis);
|
||
|
|
|
||
|
|
$baseYF = 1.0 + ($yield / $frequency);
|
||
|
|
$rfp = 100 * ($rate / $frequency);
|
||
|
|
$de = $dsc / $e;
|
||
|
|
|
||
|
|
$result = $redemption / pow($baseYF, (--$n + $de));
|
||
|
|
for ($k = 0; $k <= $n; ++$k) {
|
||
|
|
$result += $rfp / (pow($baseYF, ($k + $de)));
|
||
|
|
}
|
||
|
|
$result -= $rfp * ($a / $e);
|
||
|
|
|
||
|
|
return $result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PRICEDISC
|
||
|
|
*
|
||
|
|
* Returns the price per $100 face value of a discounted security.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param int discount The security's discount rate.
|
||
|
|
* @param int redemption The security's redemption value per $100 face value.
|
||
|
|
* @param int basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function PRICEDISC($settlement, $maturity, $discount, $redemption, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$discount = (float) PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
||
|
|
$redemption = (float) PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
||
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if ((is_numeric($discount)) && (is_numeric($redemption)) && (is_numeric($basis))) {
|
||
|
|
if (($discount <= 0) || ($redemption <= 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $redemption * (1 - $discount * $daysBetweenSettlementAndMaturity);
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PRICEMAT
|
||
|
|
*
|
||
|
|
* Returns the price per $100 face value of a security that pays interest at maturity.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security's settlement date is the date after the issue date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed issue The security's issue date.
|
||
|
|
* @param int rate The security's interest rate at date of issue.
|
||
|
|
* @param int yield The security's annual yield.
|
||
|
|
* @param int basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function PRICEMAT($settlement, $maturity, $issue, $rate, $yield, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$yield = PHPExcel_Calculation_Functions::flattenSingleValue($yield);
|
||
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if (is_numeric($rate) && is_numeric($yield)) {
|
||
|
|
if (($rate <= 0) || ($yield <= 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
$daysPerYear = self::daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement), $basis);
|
||
|
|
if (!is_numeric($daysPerYear)) {
|
||
|
|
return $daysPerYear;
|
||
|
|
}
|
||
|
|
$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
|
||
|
|
if (!is_numeric($daysBetweenIssueAndSettlement)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenIssueAndSettlement;
|
||
|
|
}
|
||
|
|
$daysBetweenIssueAndSettlement *= $daysPerYear;
|
||
|
|
$daysBetweenIssueAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenIssueAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenIssueAndMaturity;
|
||
|
|
}
|
||
|
|
$daysBetweenIssueAndMaturity *= $daysPerYear;
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity *= $daysPerYear;
|
||
|
|
|
||
|
|
return ((100 + (($daysBetweenIssueAndMaturity / $daysPerYear) * $rate * 100)) /
|
||
|
|
(1 + (($daysBetweenSettlementAndMaturity / $daysPerYear) * $yield)) -
|
||
|
|
(($daysBetweenIssueAndSettlement / $daysPerYear) * $rate * 100));
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* PV
|
||
|
|
*
|
||
|
|
* Returns the Present Value of a cash flow with constant payments and interest rate (annuities).
|
||
|
|
*
|
||
|
|
* @param float $rate Interest rate per period
|
||
|
|
* @param int $nper Number of periods
|
||
|
|
* @param float $pmt Periodic payment (annuity)
|
||
|
|
* @param float $fv Future Value
|
||
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function PV($rate = 0, $nper = 0, $pmt = 0, $fv = 0, $type = 0)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$nper = PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
||
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
||
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
|
||
|
|
// Validate parameters
|
||
|
|
if ($type != 0 && $type != 1) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
if (!is_null($rate) && $rate != 0) {
|
||
|
|
return (-$pmt * (1 + $rate * $type) * ((pow(1 + $rate, $nper) - 1) / $rate) - $fv) / pow(1 + $rate, $nper);
|
||
|
|
}
|
||
|
|
return -$fv - $pmt * $nper;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* RATE
|
||
|
|
*
|
||
|
|
* Returns the interest rate per period of an annuity.
|
||
|
|
* RATE is calculated by iteration and can have zero or more solutions.
|
||
|
|
* If the successive results of RATE do not converge to within 0.0000001 after 20 iterations,
|
||
|
|
* RATE returns the #NUM! error value.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* RATE(nper,pmt,pv[,fv[,type[,guess]]])
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Financial Functions
|
||
|
|
* @param float nper The total number of payment periods in an annuity.
|
||
|
|
* @param float pmt The payment made each period and cannot change over the life
|
||
|
|
* of the annuity.
|
||
|
|
* Typically, pmt includes principal and interest but no other
|
||
|
|
* fees or taxes.
|
||
|
|
* @param float pv The present value - the total amount that a series of future
|
||
|
|
* payments is worth now.
|
||
|
|
* @param float fv The future value, or a cash balance you want to attain after
|
||
|
|
* the last payment is made. If fv is omitted, it is assumed
|
||
|
|
* to be 0 (the future value of a loan, for example, is 0).
|
||
|
|
* @param integer type A number 0 or 1 and indicates when payments are due:
|
||
|
|
* 0 or omitted At the end of the period.
|
||
|
|
* 1 At the beginning of the period.
|
||
|
|
* @param float guess Your guess for what the rate will be.
|
||
|
|
* If you omit guess, it is assumed to be 10 percent.
|
||
|
|
* @return float
|
||
|
|
**/
|
||
|
|
public static function RATE($nper, $pmt, $pv, $fv = 0.0, $type = 0, $guess = 0.1)
|
||
|
|
{
|
||
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
||
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
||
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
||
|
|
$fv = (is_null($fv)) ? 0.0 : PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
||
|
|
$type = (is_null($type)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
||
|
|
$guess = (is_null($guess)) ? 0.1 : PHPExcel_Calculation_Functions::flattenSingleValue($guess);
|
||
|
|
|
||
|
|
$rate = $guess;
|
||
|
|
if (abs($rate) < FINANCIAL_PRECISION) {
|
||
|
|
$y = $pv * (1 + $nper * $rate) + $pmt * (1 + $rate * $type) * $nper + $fv;
|
||
|
|
} else {
|
||
|
|
$f = exp($nper * log(1 + $rate));
|
||
|
|
$y = $pv * $f + $pmt * (1 / $rate + $type) * ($f - 1) + $fv;
|
||
|
|
}
|
||
|
|
$y0 = $pv + $pmt * $nper + $fv;
|
||
|
|
$y1 = $pv * $f + $pmt * (1 / $rate + $type) * ($f - 1) + $fv;
|
||
|
|
|
||
|
|
// find root by secant method
|
||
|
|
$i = $x0 = 0.0;
|
||
|
|
$x1 = $rate;
|
||
|
|
while ((abs($y0 - $y1) > FINANCIAL_PRECISION) && ($i < FINANCIAL_MAX_ITERATIONS)) {
|
||
|
|
$rate = ($y1 * $x0 - $y0 * $x1) / ($y1 - $y0);
|
||
|
|
$x0 = $x1;
|
||
|
|
$x1 = $rate;
|
||
|
|
if (($nper * abs($pmt)) > ($pv - $fv)) {
|
||
|
|
$x1 = abs($x1);
|
||
|
|
}
|
||
|
|
if (abs($rate) < FINANCIAL_PRECISION) {
|
||
|
|
$y = $pv * (1 + $nper * $rate) + $pmt * (1 + $rate * $type) * $nper + $fv;
|
||
|
|
} else {
|
||
|
|
$f = exp($nper * log(1 + $rate));
|
||
|
|
$y = $pv * $f + $pmt * (1 / $rate + $type) * ($f - 1) + $fv;
|
||
|
|
}
|
||
|
|
|
||
|
|
$y0 = $y1;
|
||
|
|
$y1 = $y;
|
||
|
|
++$i;
|
||
|
|
}
|
||
|
|
return $rate;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* RECEIVED
|
||
|
|
*
|
||
|
|
* Returns the price per $100 face value of a discounted security.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security settlement date is the date after the issue date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param int investment The amount invested in the security.
|
||
|
|
* @param int discount The security's discount rate.
|
||
|
|
* @param int basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function RECEIVED($settlement, $maturity, $investment, $discount, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$investment = (float) PHPExcel_Calculation_Functions::flattenSingleValue($investment);
|
||
|
|
$discount = (float) PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
||
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if ((is_numeric($investment)) && (is_numeric($discount)) && (is_numeric($basis))) {
|
||
|
|
if (($investment <= 0) || ($discount <= 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $investment / ( 1 - ($discount * $daysBetweenSettlementAndMaturity));
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* SLN
|
||
|
|
*
|
||
|
|
* Returns the straight-line depreciation of an asset for one period
|
||
|
|
*
|
||
|
|
* @param cost Initial cost of the asset
|
||
|
|
* @param salvage Value at the end of the depreciation
|
||
|
|
* @param life Number of periods over which the asset is depreciated
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function SLN($cost, $salvage, $life)
|
||
|
|
{
|
||
|
|
$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
||
|
|
$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
||
|
|
$life = PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life))) {
|
||
|
|
if ($life < 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
return ($cost - $salvage) / $life;
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* SYD
|
||
|
|
*
|
||
|
|
* Returns the sum-of-years' digits depreciation of an asset for a specified period.
|
||
|
|
*
|
||
|
|
* @param cost Initial cost of the asset
|
||
|
|
* @param salvage Value at the end of the depreciation
|
||
|
|
* @param life Number of periods over which the asset is depreciated
|
||
|
|
* @param period Period
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function SYD($cost, $salvage, $life, $period)
|
||
|
|
{
|
||
|
|
$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
||
|
|
$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
||
|
|
$life = PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
||
|
|
$period = PHPExcel_Calculation_Functions::flattenSingleValue($period);
|
||
|
|
|
||
|
|
// Calculate
|
||
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life)) && (is_numeric($period))) {
|
||
|
|
if (($life < 1) || ($period > $life)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
return (($cost - $salvage) * ($life - $period + 1) * 2) / ($life * ($life + 1));
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* TBILLEQ
|
||
|
|
*
|
||
|
|
* Returns the bond-equivalent yield for a Treasury bill.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The Treasury bill's settlement date.
|
||
|
|
* The Treasury bill's settlement date is the date after the issue date when the Treasury bill is traded to the buyer.
|
||
|
|
* @param mixed maturity The Treasury bill's maturity date.
|
||
|
|
* The maturity date is the date when the Treasury bill expires.
|
||
|
|
* @param int discount The Treasury bill's discount rate.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function TBILLEQ($settlement, $maturity, $discount)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$discount = PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
||
|
|
|
||
|
|
// Use TBILLPRICE for validation
|
||
|
|
$testValue = self::TBILLPRICE($settlement, $maturity, $discount);
|
||
|
|
if (is_string($testValue)) {
|
||
|
|
return $testValue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE) {
|
||
|
|
++$maturity;
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity) * 360;
|
||
|
|
} else {
|
||
|
|
$daysBetweenSettlementAndMaturity = (PHPExcel_Calculation_DateTime::getDateValue($maturity) - PHPExcel_Calculation_DateTime::getDateValue($settlement));
|
||
|
|
}
|
||
|
|
|
||
|
|
return (365 * $discount) / (360 - $discount * $daysBetweenSettlementAndMaturity);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* TBILLPRICE
|
||
|
|
*
|
||
|
|
* Returns the yield for a Treasury bill.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The Treasury bill's settlement date.
|
||
|
|
* The Treasury bill's settlement date is the date after the issue date when the Treasury bill is traded to the buyer.
|
||
|
|
* @param mixed maturity The Treasury bill's maturity date.
|
||
|
|
* The maturity date is the date when the Treasury bill expires.
|
||
|
|
* @param int discount The Treasury bill's discount rate.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function TBILLPRICE($settlement, $maturity, $discount)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$discount = PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
||
|
|
|
||
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::getDateValue($maturity))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if (is_numeric($discount)) {
|
||
|
|
if ($discount <= 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE) {
|
||
|
|
++$maturity;
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity) * 360;
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$daysBetweenSettlementAndMaturity = (PHPExcel_Calculation_DateTime::getDateValue($maturity) - PHPExcel_Calculation_DateTime::getDateValue($settlement));
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($daysBetweenSettlementAndMaturity > 360) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
$price = 100 * (1 - (($discount * $daysBetweenSettlementAndMaturity) / 360));
|
||
|
|
if ($price <= 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
return $price;
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* TBILLYIELD
|
||
|
|
*
|
||
|
|
* Returns the yield for a Treasury bill.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The Treasury bill's settlement date.
|
||
|
|
* The Treasury bill's settlement date is the date after the issue date when the Treasury bill is traded to the buyer.
|
||
|
|
* @param mixed maturity The Treasury bill's maturity date.
|
||
|
|
* The maturity date is the date when the Treasury bill expires.
|
||
|
|
* @param int price The Treasury bill's price per $100 face value.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function TBILLYIELD($settlement, $maturity, $price)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$price = PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if (is_numeric($price)) {
|
||
|
|
if ($price <= 0) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE) {
|
||
|
|
++$maturity;
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity) * 360;
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$daysBetweenSettlementAndMaturity = (PHPExcel_Calculation_DateTime::getDateValue($maturity) - PHPExcel_Calculation_DateTime::getDateValue($settlement));
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($daysBetweenSettlementAndMaturity > 360) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
return ((100 - $price) / $price) * (360 / $daysBetweenSettlementAndMaturity);
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
public static function XIRR($values, $dates, $guess = 0.1)
|
||
|
|
{
|
||
|
|
if ((!is_array($values)) && (!is_array($dates))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
||
|
|
$dates = PHPExcel_Calculation_Functions::flattenArray($dates);
|
||
|
|
$guess = PHPExcel_Calculation_Functions::flattenSingleValue($guess);
|
||
|
|
if (count($values) != count($dates)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
|
||
|
|
// create an initial range, with a root somewhere between 0 and guess
|
||
|
|
$x1 = 0.0;
|
||
|
|
$x2 = $guess;
|
||
|
|
$f1 = self::XNPV($x1, $values, $dates);
|
||
|
|
$f2 = self::XNPV($x2, $values, $dates);
|
||
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
||
|
|
if (($f1 * $f2) < 0.0) {
|
||
|
|
break;
|
||
|
|
} elseif (abs($f1) < abs($f2)) {
|
||
|
|
$f1 = self::XNPV($x1 += 1.6 * ($x1 - $x2), $values, $dates);
|
||
|
|
} else {
|
||
|
|
$f2 = self::XNPV($x2 += 1.6 * ($x2 - $x1), $values, $dates);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (($f1 * $f2) > 0.0) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
$f = self::XNPV($x1, $values, $dates);
|
||
|
|
if ($f < 0.0) {
|
||
|
|
$rtb = $x1;
|
||
|
|
$dx = $x2 - $x1;
|
||
|
|
} else {
|
||
|
|
$rtb = $x2;
|
||
|
|
$dx = $x1 - $x2;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
||
|
|
$dx *= 0.5;
|
||
|
|
$x_mid = $rtb + $dx;
|
||
|
|
$f_mid = self::XNPV($x_mid, $values, $dates);
|
||
|
|
if ($f_mid <= 0.0) {
|
||
|
|
$rtb = $x_mid;
|
||
|
|
}
|
||
|
|
if ((abs($f_mid) < FINANCIAL_PRECISION) || (abs($dx) < FINANCIAL_PRECISION)) {
|
||
|
|
return $x_mid;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* XNPV
|
||
|
|
*
|
||
|
|
* Returns the net present value for a schedule of cash flows that is not necessarily periodic.
|
||
|
|
* To calculate the net present value for a series of cash flows that is periodic, use the NPV function.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* =XNPV(rate,values,dates)
|
||
|
|
*
|
||
|
|
* @param float $rate The discount rate to apply to the cash flows.
|
||
|
|
* @param array of float $values A series of cash flows that corresponds to a schedule of payments in dates.
|
||
|
|
* The first payment is optional and corresponds to a cost or payment that occurs at the beginning of the investment.
|
||
|
|
* If the first value is a cost or payment, it must be a negative value. All succeeding payments are discounted based on a 365-day year.
|
||
|
|
* The series of values must contain at least one positive value and one negative value.
|
||
|
|
* @param array of mixed $dates A schedule of payment dates that corresponds to the cash flow payments.
|
||
|
|
* The first payment date indicates the beginning of the schedule of payments.
|
||
|
|
* All other dates must be later than this date, but they may occur in any order.
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function XNPV($rate, $values, $dates)
|
||
|
|
{
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
if (!is_numeric($rate)) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
if ((!is_array($values)) || (!is_array($dates))) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
||
|
|
$dates = PHPExcel_Calculation_Functions::flattenArray($dates);
|
||
|
|
$valCount = count($values);
|
||
|
|
if ($valCount != count($dates)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
if ((min($values) > 0) || (max($values) < 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
$xnpv = 0.0;
|
||
|
|
for ($i = 0; $i < $valCount; ++$i) {
|
||
|
|
if (!is_numeric($values[$i])) {
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
$xnpv += $values[$i] / pow(1 + $rate, PHPExcel_Calculation_DateTime::DATEDIF($dates[0], $dates[$i], 'd') / 365);
|
||
|
|
}
|
||
|
|
return (is_finite($xnpv)) ? $xnpv : PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* YIELDDISC
|
||
|
|
*
|
||
|
|
* Returns the annual yield of a security that pays interest at maturity.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security's settlement date is the date after the issue date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param int price The security's price per $100 face value.
|
||
|
|
* @param int redemption The security's redemption value per $100 face value.
|
||
|
|
* @param int basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function YIELDDISC($settlement, $maturity, $price, $redemption, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$price = PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
||
|
|
$redemption = PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
||
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if (is_numeric($price) && is_numeric($redemption)) {
|
||
|
|
if (($price <= 0) || ($redemption <= 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
$daysPerYear = self::daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement), $basis);
|
||
|
|
if (!is_numeric($daysPerYear)) {
|
||
|
|
return $daysPerYear;
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity *= $daysPerYear;
|
||
|
|
|
||
|
|
return (($redemption - $price) / $price) * ($daysPerYear / $daysBetweenSettlementAndMaturity);
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* YIELDMAT
|
||
|
|
*
|
||
|
|
* Returns the annual yield of a security that pays interest at maturity.
|
||
|
|
*
|
||
|
|
* @param mixed settlement The security's settlement date.
|
||
|
|
* The security's settlement date is the date after the issue date when the security is traded to the buyer.
|
||
|
|
* @param mixed maturity The security's maturity date.
|
||
|
|
* The maturity date is the date when the security expires.
|
||
|
|
* @param mixed issue The security's issue date.
|
||
|
|
* @param int rate The security's interest rate at date of issue.
|
||
|
|
* @param int price The security's price per $100 face value.
|
||
|
|
* @param int basis The type of day count to use.
|
||
|
|
* 0 or omitted US (NASD) 30/360
|
||
|
|
* 1 Actual/actual
|
||
|
|
* 2 Actual/360
|
||
|
|
* 3 Actual/365
|
||
|
|
* 4 European 30/360
|
||
|
|
* @return float
|
||
|
|
*/
|
||
|
|
public static function YIELDMAT($settlement, $maturity, $issue, $rate, $price, $basis = 0)
|
||
|
|
{
|
||
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
||
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
||
|
|
$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
|
||
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
||
|
|
$price = PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
||
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
||
|
|
|
||
|
|
// Validate
|
||
|
|
if (is_numeric($rate) && is_numeric($price)) {
|
||
|
|
if (($rate <= 0) || ($price <= 0)) {
|
||
|
|
return PHPExcel_Calculation_Functions::NaN();
|
||
|
|
}
|
||
|
|
$daysPerYear = self::daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement), $basis);
|
||
|
|
if (!is_numeric($daysPerYear)) {
|
||
|
|
return $daysPerYear;
|
||
|
|
}
|
||
|
|
$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
|
||
|
|
if (!is_numeric($daysBetweenIssueAndSettlement)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenIssueAndSettlement;
|
||
|
|
}
|
||
|
|
$daysBetweenIssueAndSettlement *= $daysPerYear;
|
||
|
|
$daysBetweenIssueAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenIssueAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenIssueAndMaturity;
|
||
|
|
}
|
||
|
|
$daysBetweenIssueAndMaturity *= $daysPerYear;
|
||
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
||
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
||
|
|
// return date error
|
||
|
|
return $daysBetweenSettlementAndMaturity;
|
||
|
|
}
|
||
|
|
$daysBetweenSettlementAndMaturity *= $daysPerYear;
|
||
|
|
|
||
|
|
return ((1 + (($daysBetweenIssueAndMaturity / $daysPerYear) * $rate) - (($price / 100) + (($daysBetweenIssueAndSettlement / $daysPerYear) * $rate))) /
|
||
|
|
(($price / 100) + (($daysBetweenIssueAndSettlement / $daysPerYear) * $rate))) *
|
||
|
|
($daysPerYear / $daysBetweenSettlementAndMaturity);
|
||
|
|
}
|
||
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
||
|
|
}
|
||
|
|
}
|