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奔跑的咸鱼 · 2021年04月17日

请问b说的是什么意思?

NO.PZ2016082405000025

问题如下:

Which of the following statements regarding ratings transition matrices is least correct?

选项:

A.

Transition matrices assess rating migrations, that is, the probability that a company starting with a particular rating will be downgraded within the stated period.

B.

The diagonal elements in the transition matrix beginning at the top left show the probability of ending the year with an unchanged rating.

C.

Within a transition matrix, there is no transition from default to another rating.

D.

The probability of a rating migration is higher for lower rated companies.

解释:

A Transition matrices assess the probability that a company’s rating will remain unchanged at the end of a stated period. Rating migration measures the probability of a change in letter rating, however it encompasses both rating upgrades and downgrades.  

请问b说的是什么意思?

1 个答案

袁园_品职助教 · 2021年04月17日

它说的是从最上角开始的对角元。

在信用转移矩阵里,对角元素是评级在下一个时点依旧保持不变的概率,所以B选项是正确的。同学你看一下信用转移矩阵的横纵坐标就理解了。

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