Weak form efficiency - A form of pricing efficiency where the price of the security reflects the past price and trading history of the security. In such a market, security prices follow a random walk. Related: Semistrong form efficiency, strong form efficiency.
Weak form efficiency : a form of pricing efficiency where the price of the security reflects the past price and trading history of the security. in such a market, security prices follow a random walk. related: semistrong form efficiency, strong form efficiency.