Which model involves estimating the systematic loan loss risk of a particular sector or industry relative to the loan loss risk of an FI's total loan portfolio?

Question

BlackTom AI · Accepted Answer

Loan loss ratio-based models estimate relative systematic loss risk by comparing historical or expected loss rates for a specific sector to the institution’s overall loan loss experience.

1. Relevant knowledge points and concepts
- Loan loss ratio-based model: uses sector-specific loss rates (losses / outstanding balances) and compares them to the FI’s aggregate loan loss ratio to quantify relative, systematic risk for that sector.
- Other models: KMV (market-value driven default probabilities), CreditMetrics (rating-transition based portfolio model), CreditRisk+ (actuarial frequency-severity, default-count model), loan volume-based approaches (focus on exposure concentration rather than loss rate behavior).

2. Step-by-step reasoning
- The question asks for the model that estimates systematic loan loss risk of a sector relative to the FI’s total loan portfolio. That requires a measure comparing sector loss performance to portfolio loss performance.
- A loan loss ratio-based model computes loss ratios for each sector and the overall portfolio, then forms a relative measure (e.g., sector loss ratio divided by portfolio loss ratio) to identify sectors with higher systematic risk.

3. Calculation example (intermediate steps)
- Suppose sector A experienced $2 million losses on $100 million outstanding → sector loss ratio = 2,000,000 / 100,000,000 = 0.02 (2%).
- FI total losses = $10 million on $1,000 million outstanding → portfolio loss ratio = 10,000,000 / 1,000,000,000 = 0.01 (1%).
- Relative systematic risk = sector loss ratio / portfolio loss ratio = 0.02 / 0.01 = 2.0 → sector A has twice the systematic loss risk of the overall portfolio.

4. Why the correct answer is correct
- The loan loss ratio-based model directly constructs the required comparison (sector vs. portfolio loss rates), providing a straightforward estimate of systematic sectoral loss risk relative to the whole portfolio.

5. Why other options are incorrect (brief)
- KMV: focuses on firm-level default probabilities from market values, not direct sector-vs-portfolio loss-ratio comparisons.
- CreditMetrics: models rating migrations and portfolio value changes, not simple sector-to-portfolio loss ratio comparisons.
- CreditRisk+: an actuarial default-count model emphasizing frequency/severity, not the direct sector-to-portfolio loss-ratio metric.
- Loan volume-based model: measures exposure concentration by volume, not systematic loss risk relative to portfolio loss rates.

6. Conclusion
- The loan loss ratio-based model (option a) is the correct choice, matching the provided answer.

Which model involves estimating the systematic loan loss risk of a particular sector or industry relative to the loan loss risk of an FI's total loan portfolio?单项选择题

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