Evaluates the number of coupons payable between the settlement date and the maturity date.

settlement—The date on which payment is made to settle a trade. For a more detailed discussion on dates see Chapter 8, Working with Date/Time Data in the .

maturity—The date on which the bond comes due, and principal and accrued interest are paid. For a more detailed discussion on dates see Chapter 8, Working with Date/Time Data in the .

frequency—Frequency of the interest payments. It should be 1, 2 or 4.

basis—The method for computing the number of days between two dates. It should be 0, 1, 2, 3 or 4.

result—The number of coupons payable between the settlement date and the maturity date.

Double—If present and nonzero, double precision is used.

Function COUPON_NUM computes the number of coupons payable between the settlement date and the maturity date. For a good discussion on day count basis, see SIA Standard Securities Calculation Methods 1993, vol. 1, pages 17-35.

In this example, COUPON_NUM computes the number of coupons payable with the settlement date of November 11, 1996, and the maturity date of March 1, 2009, using the Actual/365 day count method.

settlement = VAR_TO_DT(1996, 11, 11)

maturity = VAR_TO_DT(2009, 3, 1)

frequency = 2

basis = 3

PRINT, COUPON_NUM(settlement, maturity, frequency, basis)

; PV-WAVE prints: 25