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Pricing the European call option in the model with stochastic volatility driven by Ornstein--Uhlenbeck process. Exact formulas
Sergii Kuchuk-Iatsenko, Yuliya Mishura · 2015-10-07 · via math.PR updates on arXiv.org

We consider the Black--Scholes model of financial market modified to capture the stochastic nature of volatility observed at real financial markets. For volatility driven by the Ornstein--Uhlenbeck process, we establish the existence of equivalent martingale measure in the market model. The option is priced with respect to the minimal martingale measure for the case of uncorrelated processes of volatility and asset price, and an analytic expression for the price of European call option is derived. We use the inverse Fourier transform of a characteristic function and the Gaussian property of the Ornstein--Uhlenbeck process.

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