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Becky0210 · 2024年08月03日

请问0.98怎么来的？

  1. CFA III
  2. Fixed Income

* 问题详情，请 查看题干

NO.PZ202112010200003101

问题如下：

What is the approximate unhedged excess return to the United States–based credit manager for an international credit portfolio index equally weighted across the four portfolio choices, assuming no change to spread duration and no changes to the expected loss occur?

选项：

A.

–0.257%

B.

–0.850%

C.

0.750%

解释：

A is correct. We solve for the excess spread by subtracting Expected Loss from

the respective OAS:


Recall that the United States–based investor must convert the euro return to US dollars using RDC = (1 + RFC) (1 + RFX) – 1, so the USD IG and USD HY positions comprising half the portfolio return an average 0.80%, while the EUR IG and EUR HY positions return –1.314% in US dollar terms (= ((1 + ((0.65% + 0.75%)/2)) × 0.98) – 1), so –0.257% = ((0.80% – 1.314%)/2).

请问0.98怎么来的？

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已采纳答案

pzqa31 · 2024年08月03日

嗨，从没放弃的小努力你好：


题干说了：the euro is expected to depreciate by 2% 


这道题计算过程是错误的，题目说了no default loss occur，所以，不需要考虑EXR计算公式的第三项EL，同时，没有给出spread的变动信息，所以，第二项△spread*ED这一项也没法计算。

只能用第一项OAS来计算。

对于US IG与US HY来说，EXR=OAS

对于EUR IG与EUR HY来说，由于是跨国投资，需要考虑汇率的变动，所以EXR=（1+OAS）(1+RFX)-1,RFX=-2%。

所以，EXR(US IG）=1.25%；EXR(US HY)=3.00%；EXR(EUR IG)=-0.873%；EXR(EUR HY)=1.18%。

所以portfolio 的EXR=1/4（1.25%++3%-0.873%+1.18%）=1.14%。

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