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Pricing Bermudan Swaption under Two Factor Hull-White Model with Fast Gauss Transform

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  • Tomohisa Yamakami
  • Yuki Takeuchi

Abstract

This paper describes a fast and stable algorithm for evaluating Bermudan swaption under the two factor Hull-White model. We discretize the calculation of the expected value in the evaluation of Bermudan swaption by numerical integration, and Gaussian kernel sums appears in it. The fast Gauss transform can be applied to these Gaussian kernel sums, and it reduces computational complexity from $O(N^2)$ to $O(N)$ as grid points number $N$ of numerical integration. We also propose to stabilize the computation under the condition that the correlation is close to $-1$ by introducing the grid rotation. Numerical experiments using actual market data show that our method reduces the computation time significantly compared to the method without the fast Gauss transform. They also show that the method of the grid rotation contributes to computational stability in the situations where the correlation is close to $-1$ and time step is short.

Suggested Citation

  • Tomohisa Yamakami & Yuki Takeuchi, 2022. "Pricing Bermudan Swaption under Two Factor Hull-White Model with Fast Gauss Transform," Papers 2212.08250, arXiv.org.
    • Handle: RePEc:arx:papers:2212.08250
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    References listed on IDEAS

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    5. Masaaki Fujii & Yasufumi Shimada & Akihiko Takahashi, 2009. "A Note on Construction of Multiple Swap Curves with and without Collateral," CIRJE F-Series CIRJE-F-630, CIRJE, Faculty of Economics, University of Tokyo.
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    7. Longstaff, Francis A & Schwartz, Eduardo S, 2001. "Valuing American Options by Simulation: A Simple Least-Squares Approach," University of California at Los Angeles, Anderson Graduate School of Management qt43n1k4jb, Anderson Graduate School of Management, UCLA.
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