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alanmyl · 2023年03月19日

公式是不是用modified duration*P*价格变化吗

NO.PZ2019070101000093

问题如下:

The table provides relevant information about four bonds in a portfolio, based on the table, the price change for the 8% bond using effective duration if its YTM decreases by 10 basis points is close to?

选项:

A.

$211,601.25.

B.

$223,532.12.

C.

$219,156.99.

D.

$209,111.50.

解释:

A is correct

考点:Bond Duration-DV01

解析:

8%的债券,如果YTM下降10bp,价格变化是多少?

首先,计算coupon rate8%的债券的市值:

market value=价格*权重*面值=105×0.25×1,000,000=26,250,000

再计算价格变动,YTM change=-10bp=-0.001

price change$

=[(-effective duration*YTM change)+(1/2*convexity*(YTM change2)]*market value

=[(-8×-0.001) + (0.5×122×0.0012)] *26,250,000 = $211,601.25

我记得之前讲的公式是用-D*(modified duration) *P*价格变化+1/2C*P*(价格变化)的平方。没说过用effective duration, 麻烦请确认一下到底应该用哪个Duration?感谢!

1 个答案

DD仔_品职助教 · 2023年03月19日

嗨,爱思考的PZer你好:


同学你好,

虽然公式用的是modified,但是如果题目给了effective duration就用effective。

因为effective duration衡量的更精确,可以衡量带option的bond,而modified duration在option执行时是不能准确衡量的。

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