问题
单项选择题
Which of the following tests are NOT used to examine the weak form of the efficient market hypothesis Those that examine:（）
A. whether security returns are independent over time.
B. a security’s return relative to the market return.
C. whether excess returns can be obtained from using mechanical trading rules.
答案
参考答案：B
解析：
Early tests for the semi-strong form of the efficient market hypothesis EMH) examine security performance relative to the market return. Weak-form EMH tests include auto correlation, run, and trading rule tests.