Weak Form Efficiency

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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.
References in periodicals archive ?
This implies that historical returns are not useful for predicting future returns, which is consistent with weak-form market efficiency.
Weak-form market efficiency in european emerging and developed markets.
Weak-Form Market Efficiency of an Emerging Market: Evidence from Dhaka Stock Market of Bangladesh [online], [cited 31 January 2009].
The bias effect is observed in a failure on the part of firms engaging in FFR to achieve weak-form market efficiency.
This behavior manifests itself in the fraudulent firm's inability to achieve weak-form market efficiency.
For this study, the two alternatives are whether the firm achieved or failed weak-form market efficiency for the Analysis Period under examination.
The runs tests do not support the weak-form market efficiency in 15 of the 18 stocks at 5-percent significance level.