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pseudonym · 2024年01月02日

请问c为什么是错误的?

NO.PZ2023032703000064

问题如下:

Which of the following statements best describes empirical duration?

选项:

A.

A common way to calculate a bond’s empirical duration is to run a regression of its price returns on changes in a benchmark interest rate.

B.

A bond’s empirical duration tends to be larger than its effective duration.

C.

The price sensitivity of high-yield bonds to interest rate changes is typically higher than that of investment-grade bonds.

解释:

A is correct. A bond’s empirical duration is often estimated by running a regression of its price returns on changes in a benchmark interest rate.

如题,请问c为什么是错误的?

2 个答案

pzqa015 · 2024年01月03日

嗨,爱思考的PZer你好:


HYB have lower price sensitivity to interest rate changes than IG bond。原理如下:

price sensivity to investment rate change指的是债券价格对基准利率变化的影响程度,或者说基准利率变化1单位,债券价格变化多少。

根据yC=yB+spread,实务中我们观察到spread与yB变化负相关,比如yB下降,表明经济衰退时央行采取扩张的货币政策引导基准利率下降,但衰退时公司经营恶化,公司债风险比变大,所以spread变大,正是由于spread与基准利率的负相关,导致spread对基准利率有抵消作用。

例如:yb下降1%,如果没有spread,yc也会下降1%,但有了spread后,面对yb下降,spread可能会变大0.5%,导致yc下降幅度小于yb下降幅度,这种现象在HYB身上尤为明显,因为经济衰退时,HYB的信用风险更大,spread上涨的更多,所以抵消作用更大,故对于HYB来说,面对yb下降带来的yC下降更少,同时,由于Price是根据yc求出来的,所以yc变化小,那么HYB的price变化就小,也即对基准利率的变化less sensitivity。

yb上涨1%,如果没有spread,yc也会上涨1%,但有了spread后,面对yb上涨,spread可能会下降0.5%,导致yc的上涨幅度小于yb的上涨幅度,这种现象在HYB身上尤为明显,因为经济变好时,HYB的信用风险下降的更多,spread下降的更多,抵消作用更大,故对于HYB来说,面对yb上涨带来的yc上涨更少。

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130****9100 · 2024年01月02日

 C 高收益债券对利率变化的价格敏感性通常高于投资级债券。这个不一定,不选c。

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