Efficient Market Hypothesis

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  • A theory initially developed in the 1960s by E. F. Fama, M. C. Jensen, and R. Roll. Fama formalized the theory by publishing one of a series of papers on this theory that states that it is impossible to beat the stock market because all prices and information on the market are already incorporated in the price of a stock. Because a market is efficient, it incorporates all the relevant information instantaneously before an investor or speculator can beat the market. The efficient market hypothesis theory is a well-studied and documented theory in economics. There is widespread disagreement and controversy on this theory because some economists and investors believe that one can beat the market by mathematical trading and by building mathematical models. Some investors ...

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