EMH is the most important base of the modern finance theory, but it was also given a rise to a good deal of controversy when many people agree with it.

• 有效市场假说(Efficient Market Hypothesis，简称EMH)是现代证券市场理论体系的支柱之一，也是现代金融经济学的理论基石之一，但他在不断获得支持的同时也引起了各种争论。