Definition. This function determines the number of days that have passed between the last interest payment and the change of ownership of a fixed-interest security with regular coupon dates.
Settlement (required) The date when the ownership of the security changes.
Maturity (required) The date when the repayment of the loan certified by the security takes place.
Frequency (required) Because it is quite common to have fixed-interest securities with several interest dates per year, the required argument Frequency supplies the dates-per-year number. Allowed values are: 1 = annual; 2 = biannual; 4 = quarterly.
Basis (optional) The method you want to use for determining the days ...