Explanation:
The Asymptotic Risk Factor (ASFR) model, integral to the A-IRB approach under Basel II, operates on the principle of complete diversification within a bank's credit portfolio. This model posits that idiosyncratic risks associated with individual exposures tend to cancel each other out, leaving only systematic risk as a material factor influencing portfolio losses. The assumption of complete diversification is crucial in the ASFR model as it allows for a more accurate and holistic assessment of the credit portfolio's overall risk.
A is incorrect because the ASFR model does not assume that idiosyncratic risks are predominant; instead, it focuses on systematic risk after considering the cancellation effect of diversified idiosyncratic risks.
B is incorrect because the ASFR model does not require an undiversified credit portfolio. In fact, it assumes that the portfolio is completely diversified.
D is incorrect because the ASFR model does not consider individual credit exposures in isolation; rather, it emphasizes the overall risk profile after accounting for diversification and systematic risk.
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Q.5969 A large banking group is implementing the Advanced Internal Ratings-Based (A-IRB) approach under Basel II for its global operations. The risk management team is focusing on the Asymptotic Risk Factor (ASFR) model, a key component in determining the Risk-Weighted Assets (RWA). Which of the following statements accurately reflects the principles of the ASFR model in the context of the A-IRB approach?
A
The ASFR model assumes that idiosyncratic risks are predominant over systematic risks in the credit portfolio.
B
The model requires banks to maintain a completely undiversified credit portfolio for accurate RWA calculation.
C
The ASFR model assumes complete diversification of the credit portfolio, meaning idiosyncratic risks cancel each other out.
D
In the ASFR model, individual credit exposures are considered independently without regard to their correlation with the broader market.