The COUPNUM function returns the number of coupons to be paid between the settlement and the maturity. Basis is the type of day counting you want to use: 0: US 30/ 360 (default), 1: real days, 2: real days/ 360, 3: real days/ 365 or 4: European 30/ 365.
COUPNUM funtzioak likidazioa eta mugaegunaren artean ordaindu beharrko kupoi kopurua itzultzen du. Oinarria egun- kontaketa metodoa da: 0: EB 30/ 360 (lehenetsia), 1: egun errealak, 2: egun errealak/ 360, 3: egun errealak/ 365 edo 4: Europarra 30/ 365.