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jvniki · 2024年02月10日

这道题在算pv的时候为什么会选择180而不是360。

NO.PZ2016031001000084

问题如下:

The bond equivalent yield of a 180-day banker’s acceptance quoted at a discount rate of 4.25% for a 360-day year is closest to:

选项:

A.

4.31%.

B.

4.34%.

C.

4.40%.

解释:

C is correct.

The bond equivalent yield is closest to 4.40%. The present value of the banker’s acceptance is calculated as:

PV=FV×(1DaysYear×DR)PV=FV\times{(1-\frac{Days}{Year}\times DR)}

PV=100×(1DaysYear×DR)PV=100\times{(1-\frac{Days}{Year}\times DR)}

PV=100×(1180360×0.0425)PV=100\times{(1-\frac{180}{360}\times0.0425)}

PV = 100 × (1 – 0.02125)

PV = 100 × 0.97875

PV = 97.875

The bond equivalent yield (AOR) is calculated as:

AOR=(YearDays)×(FVPVPV)AOR={(\frac{Year}{Days})}\times{(\frac{FV-PV}{PV})}

AOR=(365180)×(100PVPV)AOR={(\frac{365}{180})}\times{(\frac{100-PV}{PV})}

AOR=(365180)×(10097.87597.875)AOR={(\frac{365}{180})}\times{(\frac{100-97.875}{97.875})}

AOR = 2.02778 × 0.02171

AOR = 0.04402, or approximately 4.40%

Note that the PV is calculated using an assumed 360-day year and the AOR (bond equivalent yield) is calculated using a 365-day year.

考点:Yield Measures

解析:考查的是discount yield和 add-on yield之间的转换。1.题目给出了discount rate=4.25%,可以算出PV=100×(1-180/360×4.25%)=97.875。2.然后通过计算出来的PV再计算BEY,BEY就是365天形式的add-on-yield,BEY=365/180×(100-97.875)/97.875=4.40%,故选项C正确。

这道题在算pv的时候为什么会选择180而不是360。

1 个答案

吴昊_品职助教 · 2024年02月10日

嗨,从没放弃的小努力你好:


discount rate of 4.25%,这个利率形式是一个年化的概念,但是我们现在货币市场工具就只有180天,所以我们要去年化,4.25%×180/360,这样一来,discount rate就变成了半年的形式,从而计算出PV。

同理,当我们要计算BEY的时候,第二个括号算出来是180天的AOR,现在我们年化成365天的BEY,所以要在第二个括号的基础上×365/180。特别要注意的是BEY是365天的AOR。

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