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Aimee🌸 · 2022年07月23日

这解答思路我想的和品职的不一样,没有很理解品职的解析

NO.PZ2018091701000019

问题如下:

An investor proposes buying a one-year government zero-coupon bond with face value of $100 and priced at $97.5, investor also collected some market information, the one-year real risk-free rate at 1.56% and unexpected inflation is 2.12% last year, please calculate the implied expected inflation rate for the one-year government zero-coupon bond:

选项:

A.

1.1%

B.

-1.1%

C.

2.5%

解释:

B is correct.

考点计算公式P t= ( C F t+s )/( 1+ l t,1 + θ t,1+ π t,1 ) s

解析根据题干提供的已知变量倒推出未知变量θ97.5=100/(1+ 1.56%+θ+2.12%)

       可以计算出θ=-0.011 or -1.1%

前面的学习不是说 zero coupon bond 的r 与real risk free rate的差就是expected和unexpected inflation吗?那通过100/(1+r)=97.5反推出来 r是0.02564 则expected是0.02564-0.0156-0.0212=-0.0112,是这么理解吗?

1 个答案

星星_品职助教 · 2022年07月23日

同学你好,

理解正确。

前面有一个小地方需要纠正,应该是nominal default-free bond的利率和real default-free bond的利率之差为expected inflation和inflation uncertainty。即名义无风险利率和实际无风险利率之差为通货膨胀的部分。

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