The weak form of the efficient-market hypothesis asserts that stock prices do not rapidly adjust to new information contained in past prices or past data. stock prices do not rapidly adjust to new information contained in past prices or past data, and future changes in stock prices cannot be predicted from past prices. technicians cannot expect to outperform the market. future changes in stock prices cannot be predicted from past prices, and technicians cannot expect to outperform the market. future changes in stock prices cannot be predicted from past prices.
