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Compute the price of european interest rate swaptions according to Black76 pricing functions.
C = (F*N( d1) - X*N( d2))*exp(-rT) * multiplicator(m,tau) P = (X*N(-d2) - F*N(-d1))*exp(-rT) * multiplicator(m,tau) d1 = (log(S/X) + (r + 0.5*sigma^2)*T)/(sigma*sqrt(T)) d2 = d1 - sigma*sqrt(T)
Variables:
See also: swaption_bachelier.