Question 23
Suppose a bank is analyzing the credit risk of a group of borrowers over a period of four quarters (Q1, Q2, Q3, and Q4). The bank uses the "roll forward rate" to assess the probability of default for these borrowers during this time. The following table shows the number of borrowers in different credit risk categories:
| Quarter | Low Credit Risk | Moderate Credit Risk | High Credit Risk |
|---|---|---|---|
| Q1 | 3000 | 1500 | 500 |
| Q2 | 2800 | 1600 | 400 |
| Q3 | 2600 | 1700 | 300 |
| Q4 | 2400 | 1800 | 200 |
What does the roll forward rate indicate about the credit risk migration of borrowers from Q1 to Q4?
Borrowers with high credit risk in Q1 significantly improved their credit risk status by Q4.
The credit risk status of borrowers remained stable with no significant changes over the quarters.
Borrowers with low credit risk in Q1 are likely to have a higher probability of default by Q4.
The number of borrowers in each credit risk category decreased steadily over the quarters.