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Olinaaaaa · 2024年04月11日

公式对了 数字对了 答案不一样

NO.PZ2020011303000238

问题如下:

Suppose a portfolio has an exposure of +50 to a one basis-point increase in the five-year Treasury rate, an exposure of -100 to a one-basis-point increase in the ten-year Treasury rate, and no other exposures.

The standard deviation of the daily change in the portfolio above based on its exposure to the first two factors is 329.19.

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

解释:

题目问:假设有一个组合,当5年的treasury利率上升1bp时,exposure变成+5010年的treasury利率上升1bp时,exposure变成-100。没有其他的exposure1天的组合标准差是329.19。要求估计组合20天,95%VaR

20-day 95%VaR=201/2 × N-1(0.95) × 329.19 = 2,421.55

我不知道问题出在哪 公式对了 数字也带的一样 就是329.19✖️1.65✖️根号20等于的是2429.10

1 个答案

pzqa39 · 2024年04月11日

嗨,努力学习的PZer你好:


正态分布的情况下95%对应的分位点是1.645,保留三位算得到的就是2421

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努力的时光都是限量版,加油!

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