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BIVARIATE SUPPORT OF FORWARD LIBOR AND SWAP RATES

Farshid Jamshidian

Mathematical Finance, 2008, vol. 18, issue 3, 427-443

Abstract: Based on a certain notion of “prolific process,” we find an explicit expression for the bivariate (topological) support of the solution to a particular class of 2 × 2 stochastic differential equations that includes those of the three‐period “lognormal” Libor and swap market models. This yields that in the lognormal swap market model (SMM), the support of the 1 × 1 forward Libor L*t equals [l*t, ∞) for some semi‐explicit −1 ≤l*t≤ 0, sharpening a result of Davis and Mataix‐Pastor (2007) that forward Libor rates (eventually) become negative with positive probability in the lognormal SMM. We classify the instances l*t

Date: 2008
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https://doi.org/10.1111/j.1467-9965.2008.00340.x

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