Abstract
In this paper we consider the pricing of American options, governed by a partial differential complementarity problem. The differential problem is first approximated by a semi-linear PDE using two distinct penalty approaches which are well known in computational finance. We then initiate the two-grid algorithm by solving the nonlinear problem on a coarse grid and further the linearized in the interpolated coarse-grid solution problem on a fine grid. By means of the maximum principle the algorithm is shown to be of fourth order convergence rate in space. Numerical experiments verify the presented two-grid approach where we draw some interesting conclusions.
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Authors would like to thank the anonymous reviewers for their valuable and constructive comments that greatly contributed to improve the quality of the paper.
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Communicated by Jorge Zubelli.
The first author is supported by the Bulgarian Fund of Sciences under Project FNI I 02/9-2014. This research is supported by the European Union under Grant Agreement Number 304617 (FP7 Marie Curie Action Project Multi-ITN STRIKE-Novel Methods in Computational Finance) and the Bulgarian National Fund of Science under Project I02/20-2014.
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Chernogorova, T.P., Koleva, M.N. & Valkov, R.L. A two-grid penalty method for American options. Comp. Appl. Math. 37, 2381–2398 (2018). https://doi.org/10.1007/s40314-017-0457-6
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DOI: https://doi.org/10.1007/s40314-017-0457-6