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Enjoy · 2024年05月12日

coupon rate 是年化的概念吗?

NO.PZ2016031001000063

问题如下:

An investor considers the purchase of a 2-year bond with a 5% coupon rate, with interest paid annually. Assuming the sequence of spot rates shown below, the price of the bond is closest to:

选项:

A.

101.93.

B.

102.85.

C.

105.81.

解释:

A is correct.

The bond price is closest to 101.93. The price is determined in the following manner:

PV=PMT(1+Z1)1+PMT+FV(1+Z2)2PV=\frac{PMT}{{(1+Z_1)}^1}+\frac{PMT+FV}{{(1+Z_2)}^2}

where:

PV = present value, or the price of the bond

PMT = coupon payment per period

FV = future value paid at maturity, or the par value of the bond

Z1= spot rate, or the zero-coupon yield, for Period 1

Z2= spot rate, or the zero-coupon yield, for Period 2

PV=5(1+0.03)1+5+100(1+0.04)2PV=\frac5{{(1+0.03)}^1}+\frac{5+100}{{(1+0.04)}^2}

PV = 4.85 + 97.08 = 101.93

考点:Pricing Bonds with Spot Rates

解析:通过未来现金流折现求和,第一年的现金流(5)用S1折现,第二年的现金流(5+100)用S2折现,可得债券价格为101.93,故选项A正确。

题目中的coupon rate 是5%,按年付,说是两年期的bond,为什么每一期的coupon 不是5%除以2 呢?这个coupon rate 是年化的概念吗?

1 个答案

吴昊_品职助教 · 2024年05月12日

嗨,爱思考的PZer你好:


1、coupon rate=5%,这是年化的概念。(我们所有能表示出来的利率,都是年化的概念)

2、定位到题目中:An investor considers the purchase of a 2-year bond with a 5% coupon rate, with interest paid annually. 现在这个债券是一年付息一次的,所以每一期的coupon payment = 100×5% = 5,不需要除以2。

3、如果我们现在将题目条件做一下修改,with interest paid semi-annually,债券一年付息两次,那么一期的coupon payment = 100×5%/2 = 2.5,才需要除以2。with interest paid quarterly,债券一年付息四次,那么一期的coupon payment = 100×5%/4 = 1.25,需要除以4.

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