weak form

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.

weak form

A component in the theory of efficient markets that holds that successive changes in security prices are independent of one another. If security markets are efficient to the extent of the weak form, existing prices reflect all the information contained in historical market data. Therefore, the charting of security prices and volume is not useful in projecting future price movements. The weak form of efficient markets supports the random-walk hypothesis. Compare strong form.
References in periodicals archive ?
Eight of that 11-strong field at Ascot were covered by less than four lengths, but that's no reason to think it was weak form, especially given the seventh ran third in a big-field handicap at Epsom on Derby day and the eighth, who went in to the race in good form, won next time.
With these distinctions, it turns out that full alternations have the strong form, the weak form, the reverse strong and the reverse weak form.
There have been exceptions, called anomalies, to the weak form of the EMH.
Food and Drug Administration (FDA) such as estriol- a weak form of estrogen and progesterone.
Additionally, Fama (1970), also classified the market efficiency into three different categories, each category is characterized in terms of different forms of information as; (i) weak form efficiency, which defines that equity prices fully reflect all available information about the historical trading; (ii) semi- strong form efficiency, which delineates that the publicly available information is fully reflected by the equity prices; and (iii) the strong form efficiency which proclaims that the equity prices fully reflect possible relevant information along with inside information of the company.
In short, the existence of cointegration between assets contradicts the weak form of the market efficiency argument because of its forecastability.
* Efficient in the weak form, where the information set consists only in historical prices;
In the context of sports betting, weak form efficiency, in an economic sense, implies that by using price information it is impossible for the punter or bookmaker to make abnormal profits (Kuypers, 2000).
Our results confirm, at least qualitatively, the findings of Palamalai & Kalaivani (2015), who document weak form inefficiency in the sectoral indices that they examine.
Our results suggest that the rational expectations hypothesis is not fulfilled, but that the "weak form of rationality" is verified in any time horizon.
Remember that this field of analysis is based on the assumption that markets are weak form efficient and that past price and volume data is a good enough indicator for future price action to earn positive risk-adjusted returns.
He contends that the court has a weak form of judicial review due to its lack of jurisdiction to review inferior regulations (government regulations, presidential regulations, provincial/district regulations) (pp.