Lie symmetry methods are used to find a closed form solution for
in-arrears swaps under the 3/2 model . As well, approximate solutions are found for short-tenor in-arrears
caplets and floorlets under the same interest rate model. Comparisons are made
of the approximate option values with those obtained with a
computationally-intensive numerical scheme. The approximate pricing is found to
be substantially fast and easy to implement, while the relative errors with
respect to the “true” prices are very small.
References
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Mallier, R. and Alobaidi, G. (2004) Interest Rate Swaps under CIR. Journal of Computational and Applied Mathematics, 164-165, 543-554. http://dx.doi.org/10.1016/S0377-0427(03)00490-4
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