Evaluates the number of days starting with the beginning of the coupon period and ending with the settlement 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 PV‑WAVE User’s Guide.

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 PV‑WAVE User’s Guide.

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 days in the period starting with the beginning of the coupon period and ending with the settlement date.

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

Function SETTLEMENT_DB computes the number of days from the beginning of the coupon period to the settlement date. For a good discussion on day count basis, see SIA Standard Securities Calculation Methods 1993, vol. 1, pages 17-35.

In this example, SETTLEMENT_DB computes the number of days from the beginning of the coupon period to November 11, 1996, of a bond with 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, SETTLEMENT_DB(settlement, maturity, frequency, basis)

; PV-WAVE prints: 71