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Title: Pricing Credit Derivatives with Rating Transitions

Author(s): Viral V. Acharya, Sanjiv Ranjan Das and Rangarajan K Sundaram

Publication Date: April 2002

Keyword(s): credit derivatives, credit sensitive note, HJM model, rating transitions and risky debt

Programme Area(s): Financial Economics

Abstract: We develop a model for pricing risky debt and valuing credit derivatives that is easily calibrated to existing variables. Our approach is based on expanding the Heath-Jarrow-Morton (1990) term-structure model and its extension, the Das-Sundaram (2000) model to allow for defaultable debt with rating transitions. The framework has two salient features, comprising extensions over the earlier work: (i) it employs a rating transition matrix as the driver for the default process, and (ii) the entire set of rating categories is calibrated jointly, allowing, with minimal assumptions, arbitrage-free restrictions across rating classes, as a bond migrates amongst them. We provide an illustration of the approach by applying it to price credit sensitive notes that have coupon payments that are linked to the rating of the underlying credit.

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Bibliographic Reference

Acharya, V, Das, S and Sundaram, R. 2002. 'Pricing Credit Derivatives with Rating Transitions'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=3329