CIRJE-F-67 Kunitomo, Naoto and Yong-Jin Kim, "Effects of Stochastic Interest Rates and Volatility on Contingent Claims", January 2000.

We investigate the effects of the stochastic interest rates and the volatility of the underlying asset price on the contingent claim prices including futures and options prices. The futures price can be decomposed into the forward price and the additional terms and the options price can be decomposed into the Black-Scholes formula and several additional terms via the asymptotic expansion approach in the small disturbance asymptotics developed by Kunitomo and Takahashi (1995, 1998). We illustrate our new formulae and their numerical accuracy by using the CIR type models for the short term interest rates and stochastic volatility.