CLOSED FORM SOLUTIONS FOR QUADRATIC AND INVERSE QUADRATIC TERM STRUCTURE MODELS

Peter Laurence () and Tai-Ho Wang ()
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Peter Laurence: Department of Mathematics, Università di Roma 1, Piazz. Aldo Moro 2, 00185 Rome, Italy
Tai-Ho Wang: National Chung-Cheng University, 160, San-Hsing, Min-Hsiung, Chia-Yi621, Taiwan, ROC

International Journal of Theoretical and Applied Finance (IJTAF), 2005, vol. 08, issue 08, 1059-1083

Abstract: We find fundamental solutions in closed form for a family of parabolic equations with two spatial variables, whose symmetry groups had been determined in an earlier paper by Finkel [12]. We show how these results can be applied in finance to yield closed form solutions for special affine and quadratic two factor term structure models as well as a new class of models with inverse square behavior. The latter can be considered a partial extension to two factors of pricing models related to the Bessel process devised by Albanese and Campolieti [3] and Albanese et al. [2]. A by-product of our results is that Lie's reduction method in this setting leads only to fundamental solutions that can be factorized as products of functions that depend jointly on time and on one spatial coordinate. Thus all the results in this paper extend immediately to n factor models.

Keywords: Fokker–Planck equations; Lie groups; option pricing; symmetry analysis (search for similar items in EconPapers)
Date: 2005
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Citations: View citations in EconPapers (2)

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DOI: 10.1142/S0219024905003396

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