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Answer: Credit Risk Plus (Credit Risk+) utilizes assumptions about the default probabilities of individual firms, similar to procedures found in the insurance industry, to calculate default losses.
## Explanation **Credit Risk Plus (CreditRisk+)** is the correct answer because it focuses specifically on estimating default losses using individual firm default probabilities without explicitly modeling default correlation. This approach: - **Models default as a Poisson process** - treats defaults as independent events - **Uses insurance industry principles** - similar to how insurance companies model claims - **Does not explicitly model correlation** - unlike other models that incorporate correlation structures - **Focuses solely on default events** - rather than credit migrations or rating changes **Why other options are incorrect:** - **A. Vasicek's Model**: Explicitly models default correlation using a Gaussian copula framework - **C. Credit Metrics**: Integrates both default probabilities AND credit migrations, using correlation structures - **D. Gordy's extension**: Builds on Vasicek's model and explicitly incorporates correlation for regulatory capital CreditRisk+ is designed specifically for portfolio credit risk where the primary concern is default events, making it the most appropriate choice for estimating default losses without explicit correlation modeling.
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Which method among the following is most concerned with estimating default losses by focusing solely on individual firm default probabilities without explicitly modeling default correlation?
A
Vasicek's Model employs a one-factor Gaussian copula to approximate the expected loss distribution by considering default correlation within a portfolio over a specific time period.
B
Credit Risk Plus (Credit Risk+) utilizes assumptions about the default probabilities of individual firms, similar to procedures found in the insurance industry, to calculate default losses.
C
Credit Metrics integrates both default probabilities and credit migrations into its risk assessment, utilizing a Gaussian copula model combined with a rating transition matrix to project future credit ratings and assess losses from both downgrades and defaults.
D
Gordy's extension of Vasicek's model considers a one-factor world assumption for larger portfolios to estimate regulatory capital requirements.
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