NO.PZ2018062002000073
问题如下：
Country A is planning on enacting a new regulation that restricts some investors from participating in a market. What influence would the new regulation cause on market efficiency?
选项：
A.Market efficiency would be impeded.
B.No effect.
C.Market efficiency would be promoted.
解释：
A is correct.
Market imperfections would be accentuated and market efficiency would be impeded as the number of market participants are reduced by the new regulation.
考点：Efficient Capital Market And Its Forms
通常市场参与者越多，市场越有效。如果监管限制投资者进入市场那么就会妨碍市场有效。
为什么不能理解为禁止从业人员或公司高管投资者进入市场，从而减少内幕消息，提高市场有效性呢？
