Fast and Accurate Long Stepping Simulation of the Heston Stochastic Volatility Model
30 Pages Posted: 29 May 2010 Last revised: 16 Sep 2010
Date Written: May 28, 2010
In this paper, we present three new discretization schemes for the Heston stochastic volatility model - two schemes for simulating the variance process and one scheme for simulating the integrated variance process conditional on the initial and the end-point of the variance process. Instead of using a short time-stepping approach to simulate the variance process and its integral, these new schemes evolve the Heston process accurately over long steps without the need to sample the intervening values. Hence, prices of financial derivatives can be evaluated rapidly using our new approaches.
Keywords: Heston stochastic volatility, variance process, integrated variace process, long stepping simulation schemes, sampling gamma random variables
JEL Classification: G13
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