September 4th, 2008, 6:35 am
You can imply the strike from the yield curvewhere P(0,*) is the price of a zero coupon bond with expiry *t_0 is the starting date of the underlying swapt_n is the maturity datet_i the payment dates for the fixed legtau_i is the day count convention for the ith coupon of the fixed legP.