Joint Characteristic Function of Stock Log-Price and Squared Volatility in the Bates Model and Its Asset Pricing Applications

Date
2012-01-01
Authors
Zhylyevskyy, Oleksandr
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Research Projects
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Economics
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Abstract

The model of Bates specifies a rich, flexible structure of stock dynamics suitable for applications in finance and eco- nomics, including valuation of derivative securities. This paper analytically derives a closed-form expression for the joint conditional characteristic function of a stock’s log-price and squared volatility under the model dynamics. The use of the function, based on inverting it, is illustrated on examples of pricing European-, Bermudan-, and American-style options. The discussed approach for European-style derivatives improves on the option formula of Bates. The suggested approach for American-style derivatives, based on a compound-option technique, offers an alternative solution to exist- ing finite-difference methods

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This is an article from Theoretical Economics Letters 2 (2012): 400, doi:10.4236/tel.2012.24074. Posted with permission.

Keywords
Bates Model, Stochastic Volatility, Jump-Diffusion, Characteristic Function, Option Pricing
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