Treffer: A control variate method for weak approximation of SDEs via discretization of numerical error of asymptotic expansion.

The paper shows a new weak approximation method for stochastic differential equations as a generalization and an extension of Heath–Platen's scheme for multidimensional diffusion processes. We reformulate the Heath–Platen estimator from the viewpoint of asymptotic expansion. The proposed scheme is implemented by a Monte Carlo method and its variance is much reduced by the asymptotic expansion which works as a kind of control variate. Numerical examples for the local stochastic volatility model are shown to confirm the efficiency of the method. [ABSTRACT FROM AUTHOR]

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