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- W2043131475 abstract "Why should risk management systems account for parameter uncertainty? In order to answer this question, this paper lets an investor in a credit portfolio face non-diversifiable estimation-driven uncertainty about two parameters: probability of default and asset-return correlation. Bayesian inference reveals that - for realistic assumptions about the portfolio's credit quality and the data underlying parameter estimates - this uncertainty substantially increases the tail risk perceived by the investor. Since incorporating parameter uncertainty in a measure of tail risk is computationally demanding, the paper also derives and analyzes a closed-form approximation to such a measure." @default.
- W2043131475 created "2016-06-24" @default.
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- W2043131475 date "2009-01-01" @default.
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- W2043131475 title "Measuring Portfolio Credit Risk Correctly: Why Parameter Uncertainty Matters" @default.
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- W2043131475 doi "https://doi.org/10.2139/ssrn.1444372" @default.
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