Primal–dual simulation algorithm for pricing multidimensional American options

Primal–dual simulation algorithm for pricing multidimensional American options

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Article ID: iaor20073754
Country: United States
Volume: 50
Issue: 9
Start Page Number: 1222
End Page Number: 1234
Publication Date: Sep 2004
Journal: Management Science
Authors: ,
Keywords: option pricing
Abstract:

This paper describes a practical algorithm based on Monte Carlo simulation for the pricing of multidimensional American (i.e., continuously exercisable) and Bermudan (i.e., discretely exercisable) options. The method generates both lower and upper bounds for the Bermudan option price and hence gives valid confidence intervals for the true value. Lower bounds can be generated using any number of primal algorithms. Upper bounds are generated using a new Monte Carlo algorithm based on the duality representation of the Bermudan value function suggested independently by Haugh and Kogan, and Rogers. Our proposed algorithm can handle virtually any type of process dynamics, factor structure, and payout specification. Computational results for a variety of multifactor equity and interest-rate options demonstrate the simplicity and efficiency of the proposed algorithm. In particular, we use the proposed method to examine and verify the tightness of frequently used exercise rules in Bermudan swaption markets.

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