为什么评级上升的影响小于评级下降的影响

问题如下：

Which of the following is incorrect about the effect of rating changes on bond prices?

选项：

A.

A downgrade could send bond prices lower.

B.

Upgrades have more impact than downgrades.

C.

The upgrade could send bond prices higher.

D.

Upgrades have less impact than downgrades.

解释：

B is correct.

考点：Potential Impact of Ratings Changes

解析：评级上升会导致债券价格上升，评级下降会导致债券价格下降，但是评级上升的影响要小于评级下降的影响。选项B说法不正确，入选。

选项ACD说法正确，不入选。