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Explanation:
The correct answer is C.
Due to the rating migration matrix employing the “through-the-cycle” data approach, the observed migration during a recession will be more pronounced compared to an average period of stability. As a result, the default probabilities for the year 2025 (mentioned as 2023 in the explanation text in error, based on context) will be underestimated.
A is incorrect. The management of data in the rating migration employs a through-the-cycle approach rather than a point-in-time approach.
B is incorrect. The management of data in the rating migration employs a through-the-cycle approach rather than a point-in-time approach.
D is incorrect. In a recession, the rating migration matrix will underestimate, rather than overestimate, the defaults, considering that the observed migration tends to be more severe.
Q.5388 What correct observations could a quantitative model validator make about ABC Bank's rating migration matrix model, considering that it is based on data from 2009 to 2024, a period characterized by economic growth and mild recessions in the country where the bank operates, but the country is anticipated to face a severe recession in 2025, unlike anything seen since the 1990s?
A
The rating migration matrix adopts a point-in-time approach to data management, leading to an underestimation of the default probabilities for the year 2025.
B
By utilizing the point-in-time approach to data management, the rating migration matrix will overstate the default probabilities for the year 2025.
C
The utilization of the through-the-cycle methodology in the rating migration matrix results in an underestimation of the default probabilities for the year 2025.
D
The rating migration matrix, employing the through-the-cycle approach to data management, will overstate the default probabilities for the year 2025.
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