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Self Exciting Threshold Interest Rates Models



    (K. U. Leuven, FETEW, Naamsestraat 69, B-3000 Leuven, Belgium)



    (K. U. Leuven and U. v. Amsterdam, FETEW, Naamsestraat 69, B-3000 Leuven, Belgium)



    (K. U. Leuven, Department of Mathematics, Celestijnenlaan 200B, B-3001 Leuven, Belgium)

In this paper, we study a new class of tractable diffusions suitable for model's primitives of interest rates. We consider scalar diffusions with scale s′(x) and speed m(x) densities discontinuous at the level x*. We call that family of processes Self Exciting Threshold (SET) diffusions. Following Gorovoi and Linetsky [18], we obtain semi-analytical expressions for the transition density of SET (killed) diffusions. We propose several applications to interest rates modeling. We show that SET short rate processes do not generate arbitrage possibilities and we adapt the HJM procedure to forward rates with discontinuous scale density. We also extend the CEV and the shifted-lognormal LIBOR market models. Finally, the models are calibrated to the US market. SET diffusions can also be used to model stock price, stochastic volatility, credit spread, etc.

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Article provided by World Scientific Publishing Co. Pte. Ltd. in its journal International Journal of Theoretical and Applied Finance.

Volume (Year): 09 (2006)
Issue (Month): 07 ()
Pages: 1093-1122

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Handle: RePEc:wsi:ijtafx:v:09:y:2006:i:07:p:1093-1122
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