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Danlei · 2021年10月30日

μ为什么默认为0呢?

NO.PZ2020011303000238

问题如下:

What is the estimated 20-day, 95% VaR for the portfolio in the previous question?

选项:

解释:

The VaR is

201/2 × N-1(0.95) × 329.19 = 2,421.55

请问老师,这里计算VAR时,为什么默认μ为0呢?

1 个答案

李坏_品职助教 · 2021年10月30日

嗨,努力学习的PZer你好:


一般来说,日度的收益率μ是很小很小的数,数据量很大的时候接近于0. FRM的题目里如果没有专门给出μ的数值,可以默认为等于0

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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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