Finite Element Method for Elliptic Problems
Finite Element Method for Elliptic Problems
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We consider option pricing problems when we relax the condition of no arbitrage in the Black-Scholes model. Assuming random noise in the interest rate process, the derived pricing equation is in the form of stochastic partial differential equation. We used Karhunen-Loeve expansion to approximate the stochastic term and a combined finite difference/finite element method to effect temporal and “spatial” discretization. Computational examples in which the noise is assumed to be a Ornstein-Uhlenbeck process are provided that illustrate not only the discretization methods used, but the type of results relevant to option pricing that can be obtained from the model.