Adaptive importance sampling in least-squares Monte Carlo algorithms for backward stochastic differential equations

E. Gobet and P. Turkedjiev

Stochastic Processes and their Applications, 2017, vol. 127, issue 4, 1171-1203

Abstract: We design an importance sampling scheme for backward stochastic differential equations (BSDEs) that minimizes the conditional variance occurring in least-squares Monte-Carlo (LSMC) algorithms. The Radon–Nikodym derivative depends on the solution of BSDE, and therefore it is computed adaptively within the LSMC procedure. To allow robust error estimates w.r.t. the unknown change of measure, we properly randomize the initial value of the forward process. We introduce novel methods to analyze the error: firstly, we establish norm stability results due to the random initialization; secondly, we develop refined concentration-of-measure techniques to capture the variance reduction. Our theoretical results are supported by numerical experiments.

Keywords: Backward stochastic differential equations; Empirical regressions; Importance sampling (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:spapps:v:127:y:2017:i:4:p:1171-1203

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DOI: 10.1016/j.spa.2016.07.011

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