Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/37108
Authors: 
Rösch, Daniel
Scheule, Harald
Year of Publication: 
2009
Series/Report no.: 
Discussion papers // School of Economics and Management of the Hanover Leibniz University 418
Abstract: 
Credit risk is an important issue in many finance areas, such as the determination of cost of capital, the valuation of corporate bonds and pricing of credit derivatives. Credit risk has also been a cause and consequence of the current financial crisis. Thus, methods for measuring credit risk, default probabilities, and recoveries have caught more and more attention in the financial literature. The majority of industry credit portfolio risk models, as well as recent scientific results, are based on isolated modules for default probabilities and recoveries in the event of default. This paper shows that these common methods lead to various econometric drawbacks when the parameters are interpreted and aggregated for risk capital allocation and pricing purposes. This paper provides a top down approach in which individual credit risk parameters are derived analytically from a single model. This model allows for a i) dynamic, ii) consistent, and iii) unbiased modeling of credit portfolio risks. An empirical analysis provides evidence for the inferred relationship between credit quality, recovery and correlation.
Subjects: 
Asset Value
Correlation
Credit Portfolio
Loss Given Default
Merton Model
Probability of Default
Recovery
Volatility
JEL: 
G20
G28
C51
Document Type: 
Working Paper

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