Weak EMH

Weak EMH is a derivative of the EMH theory. The theory states that stock prices fully reflect all market trading data, such as the history of past prices, trading volume, or short interest. This version of the hypothesis implies that trend analysis is futile. This form of EMH is the most supported version of EMH but still runs into problems when trying to explain the tech stock bubble in 2000 and the housing bubble in 2006.