EXPLICIT HESTON SOLUTIONS AND STOCHASTIC APPROXIMATION FOR PATH-DEPENDENT OPTION PRICING

Michael A. Kouritzin ()
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Michael A. Kouritzin: Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton (Alberta), Canada T6G 2G1, Canada

International Journal of Theoretical and Applied Finance (IJTAF), 2018, vol. 21, issue 01, 1-45

Abstract: New simulation approaches to evaluating path-dependent options without matrix inversion issues nor Euler bias are evaluated. They employ three main contributions: (1) stochastic approximation replaces regression in the LSM algorithm; (2) explicit weak solutions to stochastic differential equations are developed and applied to Heston model simulation; and (3) importance sampling expands these explicit solutions. The approach complements Heston [(1993) A closed-form solutions for options with stochastic volatility with applications to bond and currency options, Review of Financial Studies 6, 327–343] and Broadie & Kaya [(2006) Exact simulation of stochastic volatility and other affine jump diffusion processes, Operations Research 54 (2), 217–231] by handling the case of path-dependence in the option’s execution strategy. Numeric comparison against standard Monte Carlo methods demonstrates up to two orders of magnitude speed improvement. The general ideas will extend beyond the important Heston setting.

Keywords: American options; LSM algorithm; stochastic differential equation; explicit solution; Monte Carlo simulation; Heston model; stochastic approximation (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (6)

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DOI: 10.1142/S0219024918500061

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