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Which is the weakest form of market efficiency that is violated if one could consistently generate...

Which is the weakest form of market efficiency that is violated if one could consistently generate abnormally positive returns (after accounting for all risk) by using a reversals strategy (i.e. selling stocks that experienced a stock price increase over a certain past time period and buying stocks that experienced a stock price decrease over the same past time period)?

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Weak form of market efficiency is violated if one could consistently generate abnormally positive returns (after accounting for all risk) by using a reversals strategy

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