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必过1030_ · 2020年01月26日

问一道题:NO.PZ201812020100001106

* 问题详情,请 查看题干

问题如下:

Which comment regarding CDOs and covered bonds is accurate?

选项:

A.

Easton’s comment

B.

Avelyn’s first comment

C.

Avelyn’s second comment

解释:

A is correct.

CDOs typically include some form of subordination. With subordination, a CDO has more than one bond class or tranche, including senior bond classes, mezzanine bond classes (which have credit ratings between senior and subordinated bond classes), and subordinated bond classes (often referred to as residual or equity tranches). The correlation of expected defaults on a CDO’s collateral affects the relative value between the senior and subordinated tranches of the CDO. As correlations increase, the values of the mezzanine tranches usually increase relative to the values of the senior and equity tranches.

我知道A是对的,但B和C为什么错呢?

1 个答案

发亮_品职助教 · 2020年02月03日

嗨,爱思考的PZer你好:


Replacing a portion of the corporate bonds with CDOs will provide meaningful diversification to the investment portfolio.

他说在Portfolio里,卖掉一部分Corporate bonds然后买入CDOs,可以提供Meaningful的分散化效果,这点错误,分散化的效果极其有限。

CDOs的标的物是Corporate bonds,把一堆Corporate bonds集中在一起发行CDOs,是在Corporate bonds的层面提供一定的分散化效果,但是风险依然还集中在公司债的层面。CDOs和Corporate bond集中在一起,整个Portfolio的风险是仍然集中在公司债的层面,只是说对单个公司债的风险降低,但是没有Meaningful的分散化效果。

什么程度算Meaningful的分散化效果,例如,投资公司债、国债、cash、equity、alternatives、commodities这样的Portfolio,基本分散到只承担系统性风险。而对于CDOs和Corporate bond的组合,风险依然集中在公司债,所以分散化的效果有限。


这点也是原版书给定的结论:

 

 



Investing in covered bonds will give us the yield increase we are seeking compared with investing in corporate bonds or asset-backed securities


Covered bonds是非常安全的债券,因为当资产池里的现金流不能偿还Covered bonds时,发行银行可以用自己的现金流偿还Liability。

所以对于Covered bonds的投资者来说,他们有双重保险(dual protection),第一层就是资产池正常的现金流来偿还债券,当资产池断掉现金流时,银行可以偿还。

因此,这种债券的Credit risk比较低,投资他能获得的收益也相对较低。这点也是原版书结论:

 


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