NO.PZ2018062002000086
问题如下：
For a technical analyst who uses past prices and volume to predict future prices, what's his assumption about the market efficiency?
选项：
A.
The market is semi-strong-form efficient.
B.
The market is weak-form inefficient.
C.
The market is weak-form efficient.
解释：
B is correct.
Based on the weak-form efficient hypothesis, investors cannot earn abnormal returns by trading on the basis of past prices and volume. So technical analysts assume that markets are weak-form inefficient.
考点：Efficient Capital Market And Its Forms
当技术分析可以获得超额收益时说明市场是弱势无效的。
请问这题哪里说了可以获得超额收益啊？
