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A backward Monte Carlo approach to exotic option pricing

17 aprile 2018 ore 12:00 - 13:00

Aula 104, Sede di Viale Romania, 32

Speaker: Giorgia Callegaro, Università di Padova

Abstract: 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: (i) in terms of the optimal grids originating from the Recursive Marginal Quantization algorithm, (ii) 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 we benchmark them with competitor Monte Carlo methods.

Joint work with G. Bormetti, G. Livieri, and A. Pallavicini.