WorksheetFunction.MDuration Method

Definition

Namespace:

Microsoft.Office.Interop.Excel

Assembly:

Microsoft.Office.Interop.Excel.dll

Returns the modified Macauley duration for a security with an assumed par value of $100.

public double MDuration (object Arg1, object Arg2, object Arg3, object Arg4, object Arg5, object Arg6);

Public Function MDuration (Arg1 As Object, Arg2 As Object, Arg3 As Object, Arg4 As Object, Arg5 As Object, Optional Arg6 As Object) As Double

Parameters

Arg1

Object

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.

Arg2

Object

Maturity - the security's maturity date. The maturity date is the date when the security expires.

Arg3

Object

Coupon - the security's annual coupon rate.

Arg4

Object

Yld - the security's annual yield.

Arg5

Object

Frequency - the number of coupon payments per year. For annual payments, frequency = 1; for semiannual, frequency = 2; for quarterly, frequency = 4.

Arg6

Object

Basis - the type of day count basis to use.

Returns

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.

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, which is 30 years after the January 1, 2008, issue date.

Settlement, maturity, frequency, and basis are truncated to integers.

If settlement or maturity is not a valid date, MDuration returns the #VALUE! error value.

If yld < 0 or if coupon < 0, MDuration returns the #NUM! error value.

If frequency is any number other than 1, 2, or 4, MDuration returns the #NUM! error value.

If basis < 0 or if basis > 4, MDuration returns the #NUM! error value.

If settlement ≥ maturity, MDuration returns the #NUM! error value.

Modified duration is defined as follows:

Figure 1: Equation for modified duration