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410140980 · 2022年11月09日

D选项说basel 2.5 应该考虑10天的stress var

NO.PZ2019070901000096

问题如下:

The Basel market risk capital calculation has changed from Basel I, Basel II.5 to the Fundamental Review of the Trading Book (FRTB). Which of the following correctly describe the change?

选项:

A.

According to FRTB, the expected shortfall should be calculated with a 99% confidence interval.

B.

Under this FRTB proposal, banks would be required to combine a 10-day, 99% VaR with a 250-day stressed VaR

C.

A 99% value a risk(VaR) is used as a measure for market risk in the Basel I and Basel II.5.

D.

The stressed VaR was first added in Basel II.5, which measures the behavior of market variables during a 10-day period of stressed market conditions.

解释:

C is correct.

考点:Basel I, Basel II.5和FRTB中的市场风险

解析:

Basel I和Basel II.5中的VaR都是99%的置信度,选项C正确。

FRTB中的expected shortfall的置信度为97.5%,选项A错误。

根据FRTB,银行仅仅应该计算expected shortfall,选项B错误。

Basel II.5中增加了stressed VaR,但应该在250天的市场极端情况下计算,因此D选项错误。

老师basel 2.5 应该考虑过去60天的stress var吧?

3 个答案

李坏_品职助教 · 2022年11月11日

嗨,努力学习的PZer你好:


我再来捋一下思路,以我这个为准:


先用250天找出所有极端数据,此时假定资产的μ和σ都是极端情况算出来的参数。然后用T=10计算每天的SVaR.


这样你会有一堆SVaR,然后对这一堆SVaR去求他们60天的移动平均数,也就是SVaR_avg。


你看一下我发的截图的“where:”下面的说明,写的比较清楚了。60天是用来计算average的,不是SVaR的参数T。考试一般会考你 period of stressed market conditions是250天,因为T=10这个规定和普通的VaR的要求是一样的,没什么可考的。


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李坏_品职助教 · 2022年11月10日

嗨,爱思考的PZer你好:


period是250,这个250是用来找出所有的stressed conditions极端行情,然后用10天的horizon去计算SVaR。算完之后,再用过去60天的SVaR求一个平均数。

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410140980 · 2022年11月11日

老师过去60天如果没有计算情况那不是算不了SVAR吗?还是要将计算周期放到250天内去找极端情况啊

李坏_品职助教 · 2022年11月09日

嗨,爱思考的PZer你好:


看一下讲义:

period of stressed conditions是250天。

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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!

410140980 · 2022年11月10日

老师period 是250days,准备capital需要10day的,计算周期是60天?

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