Optimal Martingales and American Option Pricing

Mario Cerrato and Abdollah Abbasyan

No 2009-38, SIRE Discussion Papers from Scottish Institute for Research in Economics (SIRE)

Abstract: Pricing American options is an interesting research topic since there is no analytical solution to value these derivatives. Different numerical methods have been proposed in the literature with some, if not all, either limited to a specific payoff or not applicable to multidimensional cases. Applications of Monte Carlo methods to price American options is a relatively new area that started with Longstaff and Schwartz (2001). Since then, few variations of that methodology have been proposed. The general conclusion is that Monte Carlo estimators tend to underestimate the true option price. The present paper follows Glasserman and Yu (2004b) and proposes a novel Monte Carlo approach, based on designing "optimal martingales" to determine stopping times. We show that our martingale approach can also be used to compute the dual as described in Rogers (2002).

Keywords: American options; Monte Carlo method (search for similar items in EconPapers)
Date: 2009
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Working Paper: Optimal martingales and American option pricing (2009)
Working Paper: Optimal Martingales and American Option Pricing (2008)
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