Abstract
We give a complete characterization of affine term structure (ATS) models based on a general non-negative Markov short rate process. This applies to the classical Cox—Ingersoll—Ross (CIR) model but includes as well short rate processes with jumps. We provide a link to the theory of branching processes and show how CBI-processes naturally enter the field of term structure modelling. Using Markov semigroup theory we exploit the full structure behind an ATS and provide a deeper understanding of some well-known properties of the CIR model. As a byproduct we get that any conservative CBI-process is a semimartingale.
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Filipović, D. (2002). Affine Short Rate Models. In: Dalang, R.C., Dozzi, M., Russo, F. (eds) Seminar on Stochastic Analysis, Random Fields and Applications III. Progress in Probability, vol 52. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8209-5_9
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DOI: https://doi.org/10.1007/978-3-0348-8209-5_9
Publisher Name: Birkhäuser, Basel
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