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karweillas · 2024年07月24日

如下

NO.PZ2019010402000011

问题如下:

A manger entered into a receive-fixed and pay-equity swap three months ago. The annualized fixed rate is 3% and equity index was at 100 when swap was entered. The maturity of swap is one year with quarterly reset, and notional amount is $100 million. The current spot rates are as follows:

Assume the equity index is currently trading at 101, the value of the swap is:

选项:

A.

320,450

B.

246,337

C.

-246,337

解释:

C is correct.

考点:equity swap求value.

解析:

首先画图:

一年期的swap,3个月之前进入的,所以时间轴如下,还剩3笔现金流。

对于equity leg来说,我们可以根据价格水平直接计算现在的value。

valueequity=(101/100)×100,000,000=101,000,000{\text{value}}_{equity}=(101/100)\times100,000,000=101,000,000

对于fixed leg来说,我们只用将三笔现金流折现即可。

Valuefixedleg=3%×(90360)×100000000×(0.997506+0.992556+0.985222)+100,000,000×0.985222=100,753,663Value_{fixedleg=}3\%\times(\frac{90}{360})\times100000000\times(0.997506+0.992556+0.985222) +100,000,000\times0.985222\\=100,753,663

Value of swap=-101,000,000+100,753,663=-246,337

这里更准确的理解是否应该乘以B0.5、B0.75、B1折现到0时刻,然后整体再除以B0.25得到t=0.25时刻的收入现值?

1 个答案
已采纳答案

李坏_品职助教 · 2024年07月24日

嗨,努力学习的PZer你好:


现在是站在t=0.25的时刻,而条件里的B0.25的意思是,从t=0.25再往后0.25时间长度的折现因子。


所以用t=0.5时刻的现金流乘以表里的B0.25,得出来的就是t=0.5时刻的第一笔利息折现到现在(t=0.25)的现值。

用t=0.75时刻的现金流乘以表里的B0.5,得出来的就是t=0.75时刻的第二笔现金流折现到现在(t=0.25)的现值。

用t=1时刻的现金流乘以表里的B0.75,得出来的就是t=1时刻的第三笔现金流(利息+本金)折现到现在(t=0.25)的现值。


表里面的B1是多余条件,用不到,也不需要再除以B0.25。

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努力的时光都是限量版,加油!

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