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花卷喵 · 2021年05月11日

为什么前面乘以的是-1

NO.PZ2018123101000036

问题如下:

Exhibit 1. Three-Factor Model of Term Structure

Note: Entries indicate how yields would change for a one standard deviation increase in a factor.

Calculate the expected change in yield on the five-year bond resulting from a one standard deviation decrease in the level factor and a one standard deviation decrease in the curvature factor.

选项:

A.

decreasing by 0.8315%.

B.

decreasing by 0.0389%.

C.

increasing by 0.0389%.

解释:

C is correct.

考点:Managing Yield Curve Risks: Decompose the risk into three factors

解析:图1中的因子表示各个因子变动一个标准差对债券收益率的影响,因此对于5年期的债券,level变动一个标准差对债券收益率的影响为-0.4352%; curvature变动一个标准差对债券收益率的影响为0.3963%,因此Level降低一个标准差,Curvature降低一个标准差对债券收益率的影响为:

(1)×(0.4352%)+(1)×0.3963%=0.0389%(-1)\times(-0.4352\%)+(-1)\times0.3963\%=0.0389\%

为什么前面乘以的是-1,而不是1
1 个答案

WallE_品职答疑助手 · 2021年05月11日

嗨,努力学习的PZer你好:


因为问的是one standard deviation decrease 

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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!

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