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# WorksheetFunction.CoupDays Method

Office 2007
Returns the number of days in the coupon period that contains the settlement date.

Syntax

expression.CoupDays(Arg1, Arg2, Arg3, Arg4)

expression   A variable that represents a WorksheetFunction object.

Parameters

NameRequired/OptionalData TypeDescription
Arg1RequiredVariantThe security's settlement date. The security settlement date is the date after the issue date when the security is traded to the buyer.
Arg2RequiredVariantThe security's maturity date. The maturity date is the date when the security expires.
Arg3RequiredVariantThe number of coupon payments per year. For annual payments, frequency = 1; for semiannual, frequency = 2; for quarterly, frequency = 4.
Arg4OptionalVariantThe type of day count basis to use.

Return Value
Double

Remarks

Important   Dates should be entered by using the DATE function, or as results of other formulas or functions. For example, use DATE(2008,5,23) for the 23rd day of May, 2008. Problems can occur if dates are entered as text.

The following table contains the values used in

Arg4.
BasisDay count basis
0 or omittedUS (NASD) 30/360
1Actual/actual
2Actual/360
3Actual/365
4European 30/360
• Microsoft Excel stores dates as sequential serial numbers so they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900. Microsoft Excel for the Macintosh uses a different date system as its default.
• The settlement date is the date a buyer purchases a coupon, such as a bond. The maturity date is the date when a coupon expires. For example, suppose a 30-year bond is issued on January 1, 2008, and is purchased by a buyer six months later. The issue date would be January 1, 2008, the settlement date would be July 1, 2008, and the maturity date is January 1, 2038, 30 years after the January 1, 2008 issue date.
• All arguments are truncated to integers.
• If settlement or maturity is not a valid date, CoupDays generates an error.
• If frequency is any number other than 1, 2, or 4, CoupDays generates an error.
• If basis < 0 or if basis > 4, CoupDays generates an error.
• If settlement ≥ maturity, CoupDays generates an error.