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王一 · 2020年03月20日

问一道题:NO.PZ2020021204000037 [ FRM I ]

问题如下:

The Eurodollar futures price for a contract that matures in three years is 95.75. The standard deviation of the change in the short rate in one year is 0.8%. Estimate the continuously compounded forward rate between three and 3.25 years.

解释:

The actual/360 futures rate is 100 - 95.75 = 4.25. This is 4.25 X 365/360 = 4.3090% on an actual/actual basis.

This rate is compounded quarterly. The rate with continuous compounding is 4 X ln(1 + 0.043090/4) = 0.042860

or 4.2860%. The convexity adjustment is 0.5 X 0.0082 X 3 X 3.25 = 0.000312

An estimate of the continuously compounded forward rate is therefore:

0.042860 - 0.000312 = 0.042548 or 4.255%.

是因为fra的day count 是actual/actual?所以才这样转化的?根据是什么?
王一 · 2020年03月20日

但是fra本身不就是基于libor的为啥还要再转换day count呢?

1 个答案

袁园_品职助教 · 2020年03月20日

同学你好!

因为libor记利息是按单利(每年360天)算的,但是一年实际是365天,所以单利计息会多出来5天的利息,这里计算比较严谨。

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2024-11-08 17:01 1 · 回答

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