Weak-form efficiency

A pricing theory that the price of a security reflects the past price and trading history of the security. Theory implies that security prices follow a random walk. Related: Semistrong-form efficiency, strong-form efficiency.

Weak Form Efficiency

A version of the efficient markets theory on how markets work. It holds that the market efficiently deals with most information on a given security and reflects it in the price immediately. Specifically, weak form efficiency states that technical analysis is ineffective and that prices are on a random walk. Investors and academics disagree on how well the model works, but it is less controversial than the semi-strong form of the EMT and the strong form of the EMT.

单词	weak-form efficiency
释义	Weak-form efficiency Weak-form efficiency A pricing theory that the price of a security reflects the past price and trading history of the security. Theory implies that security prices follow a random walk. Related: Semistrong-form efficiency, strong-form efficiency. Weak Form Efficiency A version of the efficient markets theory on how markets work. It holds that the market efficiently deals with most information on a given security and reflects it in the price immediately. Specifically, weak form efficiency states that technical analysis is ineffective and that prices are on a random walk. Investors and academics disagree on how well the model works, but it is less controversial than the semi-strong form of the EMT and the strong form of the EMT.
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