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Mercury. · 2024年04月30日

请问怎么我按出来答案是A

NO.PZ2019011002000008

问题如下:

Bond B is a 5-year corporate bond with a fixed coupon rate of 7%. The coupon is paid annually. The bond is rated at AA.

Assume the fair value of the bond is 1098.14. The bond’s value assuming no default (VND) is 1187.22.

Li, a credit analyst in a wealth management firm, wants to know the credit spread of Bond B over a theoretical comparable-maturity government bond with the same coupon rate as this bond.

According to the information above, the credit spread is closest to:

选项:

A.

1.78%

B.

1.83%

C.

2.55%

解释:

B is correct.

考点:计算Credit spread

解析:

已知该公司债的Fair value是1098.14,并且该债券是5年期,Coupon rate为7%,根据债券定价,可以反求出其YTM:

l70(1+YTM)+70(1+YTM)2+70(1+YTM)3+70(1+YTM)4+1070(1+YTM)5=1098.14{l}\frac{70}{(1+YTM)}+\frac{70}{(1+YTM)^2}+\frac{70}{(1+YTM)^3}+\frac{70}{(1+YTM)^4}+\frac{1070}{(1+YTM)^5}\\=1098.14

反求出来的YTM为4.75%。

而有题干信息The bond’s value assuming no default (VND) is 1187.22,可知利用无风险利率对该债券折现出来的价值为1187.22,该价值就等于假设的期限相同Coupon rate相同国债的价格,通过该价格反求出来的YTM就是对应假设国债的YTM:

l70(1+YTM)+70(1+YTM)2+70(1+YTM)3+70(1+YTM)4+1070(1+YTM)5=1187.22{l}\frac{70}{(1+YTM)}+\frac{70}{(1+YTM)^2}+\frac{70}{(1+YTM)^3}+\frac{70}{(1+YTM)^4}+\frac{1070}{(1+YTM)^5}\\=1187.22

经过计算YTM为:2.92%

则Credit spread为:4.75% - 2.92% = 1.83%

N=5,PV=-1098.14,PMT=70,FV=1000 得到I/Y=4.6666

N=5,PV=-1187.22,PMT=70,FV=1000 得到I/Y=2.8897

算出来是4.6666-2.8897=1.78% 不是1.83%

1 个答案

pzqa31 · 2024年05月01日

嗨,爱思考的PZer你好:


我用计算器敲了一遍,算出来的结果和你不一样。

第一步:N=5,PV=-1098.14,PMT=70,FV=1000,求得I/Y=4.75

第二步:N=5,PV=-1187.22,PMT=70,FV=1000,求得I/Y=2.92

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