Question: Alexander, Fama and Blume found that exploiting filter rules for trading based on historical stock prices could not generate abnormal returns above transaction costs.Their findings

Alexander, Fama and Blume found that exploiting filter rules for trading based on historical stock prices could not generate abnormal returns above transaction costs.Their findings provide evidence that supports __________.

A) Weak form of market efficiency

B) Semi-strong form of market efficiency

C) Strong form of market efficiency

D) Technical analysis

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