Credit Value at Risk (FRM Part 2 - Book 2 - Credit Risk Measurement and Management - Ch 10)

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After completing this reading, you should be able to:
- Compare market risk value at risk (VaR) with credit VaR in terms of definition, time horizon, and tools for measuring them.
- Define and calculate credit VaR.
- Describe the use of rating transition matrices for calculating credit VaR.
- Describe the application of the Vasicek model to estimate capital requirements under the Basel II internal-ratings-based (IRB) approach.
Interpret the Vasicek’s model, Credit Risk Plus (CreditRisk+) model, and the CreditMetrics ways of estimating the probability distribution of losses arising from defaults as well as modeling the default correlation.
- Define credit spread risk and assess its impact on calculating credit VaR.

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Is the WCDR formula wrong? the N-1(X) should not be in the sqaureroot