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Kathy苏苏 · 2021年07月05日

comment 1

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NO.PZ201812020100001103

问题如下:

Which of Avelyn’s comments regarding considerations in the bottom-up approach is most accurate?

选项:

A.

Comment 1

B.

Comment 2

C.

Comment 3

解释:

C is correct.

When an issuer announces a new corporate bond issue, the issuer’s existing bonds often decline in value and their spreads widen. This dynamic is often explained by market participants as an effect of increased supply. A related reason is that because demand is not perfectly elastic, new issues are often given a price concession to entice borrowers to buy the new bonds. This price concession may result in all of an issuer’s existing bonds repricing based on the new issue’s relatively wider spread. A third reason is that more debt issuance may signal an increase in an issuer’s credit risk.

老师,原本书上Comment 1 与这里的不同,原版书上是Callable debt has a smaller option- adjusted spread than comparable non-callable debt.请问原版书上这句话为什么不对?谢谢。

1 个答案

pzqa015 · 2021年07月06日

嗨,努力学习的PZer你好:


老师,原本书上Comment 1 与这里的不同,原版书上是Callable debt has a smaller option- adjusted spread than comparable non-callable debt.请问原版书上这句话为什么不对?谢谢。

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同学你好

原版书这句话表述错误了,已经勘误了,对于callable与comparable non callable的OAS是相等的

OAS是剔除权利影响后的Z spread。

对于不含权债,Z spread包括credit spread,liquidity spread,term spread等,因为不含权,所以不含权债的Z spread与OAS含义是一样的,值是相同的;

对于可比callable bond,Z spread除了上述spread外,还包含对投资者未来可能被动卖回债券的风险补偿,可以看成对投资者short call option的风险补偿,所以,对于可比callable bond来说,Z spread大于不含权债的Z spread(OAS)的,多出的这一块,就是对short option的风险补偿。如果从Z spread中剔除 option spread,那么对于comparable callable与non callable,spread就没什么区别了,callable bond剔除权利影响后的Z spread就是OAS,所以,它与不含权债的Zspread(OAS)是相等的。

这里有点绕,同学细细想想哈!

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NO.PZ201812020100001103 Comment 2 Comment 3 C is correct. When issuer announces a new corporate bonissue, the issuer’s existing bon often cline in value antheir sprea win. This namic is often explainemarket participants effeof increasesupply. A relatereason is thbecause manis not perfectly elastinew issues are often given a priconcession to entiborrowers to buy the new bon. This priconcession mresult in all of issuer’s existing bon repricing baseon the new issue’s relatively wir sprea A thirreason is thmore issuanmsignincrease in issuer’s cret risk. 老师,请按字面意思翻译下comment 1,谢谢。

2021-07-02 22:31 1 · 回答

老师我来顺一下 不管PUTABLE 和 callable 他们的O理论上应该和同等条件只是缺少这两个权利的bon OAS相等。 然后一般的BON的 z spre基本是等于 OAS的 所以在比较的时候, callable 因为含有对投资者不利的权力,所以价格低,所以同等cash flow 情况下,下面的折现率要更大,才会使得价格变小,所以callable 的 O大于 同等 bon的O即同等 bon Z sprea这样理解对吗?

2020-02-25 10:42 1 · 回答

问题1,按照书上说的Callable bonhas a higher OAS tha comparable non-callable bon那是不是putable bonhas a higher OAS tha comparable non-putable bon 问题2,关于问题1这个知识点只是在bottom up知识点这儿是成立的。不和之前二级学的那个冲突对吗?二级中好像有个知识点说,如果一个债券oas小于z-sprea则为callable bon如果大于,则为putable bond

2020-02-16 22:23 1 · 回答

Comment 2为什么错了呢?

2020-01-29 14:49 1 · 回答