Weighted Monte Carlo: Calibrating the Smile and Preserving Martingale Condition

Details Weighted Monte Carlo: Calibrating the Smile and Preserving Martingale Condition Weighted Monte Carlo: Calibrating the Smile and Preserving Martingale Condition

2011-02-17

arxiv.org/abs/1102.3541v1

Risk Magazine, Vol. 19, No. 5, May 2006

Economy

Quantitative Finance

Computational Finance

6 pages, 6 figures

Scientific paper

Weighted Monte Carlo prices exotic options calibrating the probabilities of previously generated paths by a regular Monte Carlo to fit a set of option premiums. When only vanilla call and put options and forward prices are considered, the Martingale condition might not be preserved. This paper shows that this is indeed the case and overcomes the problem by adding additional synthetic options. A robust, fast and easy-to-implement calibration algorithm is presented. The results are illustrated with a geometric cliquet option which shows how the price impact can be significant.

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