问题
单项选择题
Tests of trading rules based on available market data are tests of which form of the efficient markets hypothesis (EMH)（）
A. Strong-form.
B. Semip-form.
C. Weak-form.
答案
参考答案：C
解析：
Trading rule tests are used to examine the weak form of the EMH. Most evidence suggests that technical trading rules do not produce superior returns after adjusting for transaction costs and taxes.