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pz-stepsutake · 2020年02月24日

问一道题:NO.PZ2016082406000072

问题如下:

An investor has sold default protection on the most senior tranche of a CDO. If the default correlation decreases unexpectedly, assuming everything else is unchanged, the investor’s position will

选项:

A.

Gain value since the probability of exercising the protection falls.

B.

Lose value, since the investor^ protection will gain value.

C.

Neither gain nor lose value since only expected default losses matter and correlation does not affect expected default losses.

D.

It depends on the pricing model used and the market conditions.

解释:

ANSWER: A

The value of the senior tranche depends on the default correlation. If this goes down, the distribution of losses will be more diversified, or tighter, which makes it less likely that losses will wipe out the lower tranches. Hence, the value of senior tranche goes up. Selling default protection is equivalent to being long the senior tranche, which creates a gain under these conditions.

看了之前的问答,还是不明白,麻烦再给解释下

1) 从哪看出来标的物降价了?题目不是说default correlation降低么。

2) sell default protection是什么角色,怎么理解,为什么说等于long senior?

1 个答案

orange品职答疑助手 · 2020年02月25日

同学你好,我是这样理解的,相关系数降低的话,对senior tranche是好事啊,就大概率亏不到它了。 sell default protection相当于卖senior 层的保险啊,因为没损失了,所以卖保险不用赔,就相当于赚保费了。

卖保险相当于看多嘛