FRM Part I · FRM Exam Part I · External and Internal Credit Ratings
A risk analyst observes the following one-year transition data for a through-the-cycle agency rating grade, Baa, in two years. In an expansion year, 2% of Baa issuers were downgraded and 6% upgraded. In a recession year, 3% were downgraded and 4% upgraded. A comparable PIT internal grade showed 1% downgraded and 15% upgraded in the expansion, and 25% downgraded and 2% upgraded in the recession. Which conclusion is best supported?
The internal grade is more cyclical. Its downgrade rate jumps from 1% to 25% and upgrades fall from 15% to 2% between expansion and recession, while the agency grade moves only from 2% to 3% downgrades. Large swings in migration indicate point-in-time behaviour; small swings indicate through-the-cycle.
- AThe agency grade is more cyclical because its downgrade rate changed by only 1 percentage point
- BThe internal grade is more cyclical, as its migration rates swing far more between the expansion and the recessionCorrect
- CBoth grades are equally cyclical because each shows more upgrades in expansions
- DThe agency grade is a PIT grade because its upgrade rate is higher in expansions
Explanation
The agency downgrade rate moves from 2% to 3% (1 point) and upgrades from 6% to 4%, a small shift. The internal grade's downgrades move from 1% to 25% (24 points) and upgrades from 15% to 2%. Large swings indicate PIT behaviour, so the internal grade is more cyclical. The first option reverses the logic: small changes indicate TTC.
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