NO.PZ2023040301000098
问题如下：
Which of the following best describes the majority of the evidence regarding anomalies in stock returns
选项：
A.Weak-form market efficiency holds but semi-strong form efficiency does not
Neither weak-form nor semi-strong form market efficiency holds
Reported anomalies are not violations of market efficiency but are the result of research methodologies
解释：
The majority of evidence is that anomalies are not violations of market efficiency but are due to the research methodologies used. Portfolio management based on anomalies will likely be unprofitable after costs are considered
弱势有效市场，基本面有用 。 半强势基本面没用。
那弱势中，基本面就能获得 阿尔法啊。
那既然获得阿尔法 不就可以说明 股价异常么
所以A错在哪里？
还是我上述结论搞晕了
