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Interaction of market and credit risk: an analysis of inter-risk correlation and risk aggregation

  • Hillebrand, Martin
  • Böcker, Klaus
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    In this paper we investigate the interaction between a credit portfolio and another risk type, which can be thought of as market risk. Combining Merton-like factor models for credit risk with linear factor models for market risk, we analytically calculate their interrisk correlation and show how inter-risk correlation bounds can be derived. Moreover, we elaborate how our model naturally leads to a Gaussian copula approach for describing dependence between both risk types. In particular, we suggest estimators for the correlation parameter of the Gaussian copula that can be used for general credit portfolios. Finally, we use our findings to calculate aggregated risk capital of a sample portfolio both by numerical and analytical techniques.

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    File URL: http://econstor.eu/bitstream/10419/19788/1/200811dkp_b_.pdf
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    Paper provided by Deutsche Bundesbank, Research Centre in its series Discussion Paper Series 2: Banking and Financial Studies with number 2008,11.

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    Date of creation: 2008
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    Handle: RePEc:zbw:bubdp2:7321
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