A Backward Monte Carlo Approach to Exotic Option Pricing
47 Pages Posted: 5 Nov 2015 Last revised: 4 Oct 2016
Date Written: October 3, 2016
We propose a novel algorithm which allows to sample paths from an underlying price process in a local volatility model and to achieve a substantial variance reduction when pricing exotic options. The new algorithm relies on the construction of a discrete multinomial tree. The crucial feature of our approach is that -- in a similar spirit to the Brownian Bridge -- each random path runs backward from a terminal fixed point to the initial spot price. We characterize the tree in two alternative ways: in terms of the optimal grids originating from the Recursive Marginal Quantization algorithm and following an approach inspired by the finite difference approximation of the diffusion's infinitesimal generator. We assess the reliability of the new methodology comparing the performance of both approaches and benchmarking them with competitor Monte Carlo methods.
Keywords: Monte Carlo, Variance Reduction, Quantization, Markov Generator, Local Volatility, Option Pricing
JEL Classification: C63, G12, G13
Suggested Citation: Suggested Citation