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苏皖W&W · 2024年04月17日

A选项

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NO.PZ202110140100000504

问题如下:

Which of the following conclusions of Exhibit 1 is least likely to be true?

选项:

A.5% of the time, losses from Factor 1 would be at least 6.49%. B.When the VaR is exceeded in Factor 1, we should expect an average loss of 15.73%. C.5% of the time, losses from Factor 2 are likely to be worse than losses from Factor 1.

解释:

C is correct.

The VaR metrics in Exhibit 1 show that 5% of the time, losses will be at least 6.49% and 0.77%, respectively, for Factor 1 and Factor 2. The CVaR metrics in Exhibit 1 show that the weighted average of all loss outcomes that exceed the VaR loss are 15.73% and 4.21% for Factor 1 and Factor 2, respectively. Thus, A is true because it correctly defines VaR, and B is true because it correctly defines CVaR, whereas C is untrue because both VaR and CVaR are lower for Factor 2 than Factor 1.


难道不是95%的时候,最小损失为6.49%? 那么5%的时候最大损失为6.49%

1 个答案

品职助教_七七 · 2024年04月17日

嗨,努力学习的PZer你好:


5%描述的是左尾情况,此时VaR为最小损失,任何左尾上的损失都要超过VaR;故A选项中的at least 6.49%是正确描述。(不能作为“least likely to be true”的选项)

95%描述的是右侧情况,此时VaR为最大损失。右侧任意一点对应的损失都要低于VaR,还有gain的情况。

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努力的时光都是限量版,加油!

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NO.PZ202110140100000504 老师,但是最大损失,Factor2要比Factor1大啊,所以C是不是没表示清楚?

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