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In Rememberance: World Trade Center (WTC)

Filtering and Incomplete Information in Credit Risk

by Rüdiger Frey of the University of Leipzig, and
Thorsten Schmidt of Chemnitz University of Technology

January 22, 2010

Abstract: This paper studies structural and reduced-form credit risk models under incomplete information. Applying stochastic filtering techniques we tackle the aspect of incomplete information in different settings: starting with a brief introduction to stochastic filtering we thereafter cover the pricing of corporate securities (debt and equity) in structural models under partial information. Furthermore the construction of a dynamic reduced-form credit risk model via the innovations approach is discussed; as well as pricing, calibration and hedging in that model.

Keywords: Credit risk, credit derivatives, filtering, incomplete information, structural models, intensity based models.

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