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Nonlinear Kalman Filtering in Affine Term Structure Models

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  • Peter Christoffersen
  • Christian Dorion
  • Kris Jacobs
  • Lotfi Karoui

Abstract

The extended Kalman filter, which linearizes the relationship between security prices and state variables, is widely used in fixed income applications. We investigate if the unscented Kalman filter should be used to capture nonlinearities, and compare the performance of the Kalman filter to that of the particle filter. We analyze the cross section of swap rates, which are mildly nonlinear in the states, and cap prices, which are highly nonlinear. When caps are used to filter the states, the unscented Kalman filter significantly outperforms its extended counterpart. The unscented Kalman filter also performs well when compared to the much more computationally intensive particle filter. These findings suggest that the unscented Kalman filter may prove to be a good approach for variety of problems in fixed income pricing.

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Bibliographic Info

Paper provided by CIRPEE in its series Cahiers de recherche with number 1404.

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Date of creation: 2014
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Handle: RePEc:lvl:lacicr:1404

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Keywords: Kalman filtering; nonlinearity; term structure models; swaps; caps;

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