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Catherine · 2023年07月17日

A不懂

NO.PZ2016072602000051

问题如下:

Which of the following statements is not correct about the foundation IRB and the advanced IRB approaches for credit risk capital charges in Basel II?

选项:

A.

Under the advanced IRB approach, banks are allowed to use their own estimates of PD, LGD, EAD, and correlation coefficient but must use the risk weight functions provided by the supervisors.

B.

Under the foundation IRB approach, banks provide their own estimates of PD and rely on supervisory estimates for other risk components.

C.

Banks adopting the advanced IRB approach are expected to continue to employ this approach. A voluntary return to the standardized approach is permitted only in extraordinary circumstances.

D.

Under both foundation IRB and advanced IRB approaches, the expected loss is not included in the credit risk capital charge.

解释:

A is correct. Banks are never allowed to use their own correlations.

Correlation和PD有关,PD是自己估计的,那correlation不也相当于银行自己估计吗

3 个答案

李坏_品职助教 · 2023年10月19日

嗨,努力学习的PZer你好:


这个“自己estimate”的意思是银行可以自己任意给定一个具体的ρ。

而按照BASEL II的advanced IRB,这个ρ是通过以PD为参数的公式算出来的,这个公式算出来是几那就是几(不能随意地为了修改ρ的结果而去操纵PD的大小)。也不能任由银行随意指定一个ρ。

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就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

zora · 2023年10月19日

rho是根据pd来定的,pd是银行自己算的,不就是等于rho是由银行自己定的吗

李坏_品职助教 · 2023年07月17日

嗨,从没放弃的小努力你好:


这个A项错误的,原因是:银行要用Basel II要求的公式来计算rho,而不是任由银行自己定rho的数值。

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虽然现在很辛苦,但努力过的感觉真的很好,加油!

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