Abstract
We develop numerical algorithms to solve inverse problems of determining time-dependent volatility according to point measurements inside of a truncated domain for regime-switching models of European options. An average linearization in time of the diffusion terms of the initial-boundary problems is used. Difference schemes on Tavella-Randall grids are derived. The numerical method is based on a decomposition of the difference solution with respect to the volatility for which the transition to the new time layer is carried out by solving two discrete elliptic system problems. Numerical experiments are performed to verify the effectiveness and robustness of the new algorithms.
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Acknowledgements
The authors are thankful to the reviewers for their constructive comments and suggestions, which significantly improved the quality of the paper.
This paper contains results of the work on project No 2019 - FNSE - 05, financed by “Scientific Research” Fund of Ruse University. The research is also supported by the Bulgarian National Science Fund under Project DN 12/4 “Advanced analytical and numerical methods for nonlinear differential equations with application in finance and environmental pollution” from 2017, and project No 2019 - FNSE - 03.
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Georgiev, S.G., Vulkov, L.G. (2021). Numerical Identification of Time-Dependent Volatility in European Options with Two-Stage Regime-Switching. In: Dimov, I., Fidanova, S. (eds) Advances in High Performance Computing. HPC 2019. Studies in Computational Intelligence, vol 902. Springer, Cham. https://doi.org/10.1007/978-3-030-55347-0_21
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