B还是不太明白和weak form有什么关系

问题如下：

Following are some typical market anomalies, which of them contradicts the weak form of the efficient market hypothesis?

选项：

Closed-end fund discount.

Momentum pattern.

Earnings surprise.

解释：

B is correct.

The momentum pattern indicates that by using historical price information, analysts are able to earn abnormal returns, which is inconsistent with weak-form market efficiency.

考点：Tests, Implications And Conclusions Of EMH

弱势有效市场假定投资者不能根据市场过去交易的量、价信息获取超额收益。

但是MOMENTUM PATTERN却是认为过去的价格走势可以延续，并依据过去的价格信息获取超额收益，这是违反弱势有效市场假设的。

A和C都只是一种市场异象，原版书并没有提及他们试图推翻的是哪种市场有效情况，因此不在考纲要求范围之内，对该异象简单了解即可。