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Fate Chain · 2024年04月24日

【债券现值】

NO.PZ2018123101000027

问题如下:

Smith gathers information on spot rates for on-the-run annual-coupon government securities and swap spreads, as presented in Exhibit below.

Smith buys a four-year, zero-coupon corporate bond and then sell it after two years. Smith illustrates the returns from this strategy using the swap rate as a proxy for corporate yields. Smith should show a total return closest to:

选项:

A.

4.31%.

B.

5.42%.

C.

6.53%.

解释:

C is correct.

考点:考察Riding the yield curve策略

解析:由题干已知,Swap rate来代替公司债的收益率;四年期的Swap spread息差为0.70%,4年期的国债收益率Government spot rate 为4.05%,则4年期的swap rate = 4.05% + 0.70% = 4.75%。

因此,购买的4年期零息债券的价格为:

price=100(1+0.0475)4=83.058price=\frac{100}{{(1+0.0475)}^4}=83.058

两年期的公司债收益率为2年期的Swap rate, swap rate = 2.70% +0.30% = 3%,

4年期的零息债券持有2年后的卖出价格为:

price=100(1+0.0300)2=94.260price=\frac{100}{{(1+0.0300)}^2}=94.260

则这笔投资的年化总收益为:

94.26083.0581=0.0653=6.53%\sqrt{\frac{94.260}{83.058}}-1=0.0653=6.53\%

关于持有两年后的价格计算,为什么不是用f(2,4)来折现,而是用S2来折现呢

1 个答案

吴昊_品职助教 · 2024年04月24日

嗨,爱思考的PZer你好:


Riding the yield curve要能成功的实施,有两个条件必须要满足:

第一:Yield curve必须是Upward sloping,这样当债券从长期变成短期,收益率才能从长期更高的收益率“滑落至”短期更低的收益率。实现“Riding”这个动作。

第二:Yield curve必须是Stable的,即稳定的,也就意味着今年收益率曲线长什么样,预测未来实施这个策略的投资期内,收益率曲线还长什么样,是一模一样不变的。

现在要计算4年期的零息债券持有2年后的卖出价格,到了两年之后两年期的利率和站在现在的两年期利率是一样的,都是3%不变。正因为收益率曲线是stable的,过了2年后的收益率曲线和现在的收益率曲线是一样的,从第四年往第二年折现,这2年的利率和现在的两年期利率是一样的。

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