NO.PZ2015122802000072
问题如下：
In an efficient market, the change in a company’s share price is most likely the result of:
选项：
A.insiders’ private information.
B.the previous day’s change in stock price.
C.new information coming into the market.
解释：
C is correct.
Today’s price change is independent of the one from yesterday, and in an efficient market, investors will react to new, independent information as it is made public.
考点：Efficient Capital Market And Its Forms
如果说市场是有效的，相当于告诉我们股票价格等于价值即当前股票价格已经反映了全部的信息。只有当新的信息出现，价格才会随之发生变化。
我理解题目，市场有效，说明所有的信息都已经被市场接纳，或者接纳瞬间都反应到价格中，只有private inf因为是被禁止，但是又进入到市场，才引起价格变动
所以，哪里错了呢
