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efficient market

   Also found in: Wikipedia 0.04 sec.
Efficient market
Market in which prices correctly reflect all relevant information.
efficient market
A market in which security prices reflect all available information and adjust instantly to any new information. If the security markets are truly efficient, it is not possible for an investor consistently to outperform stock market averages such as the S&P 500 except by acquiring more risky securities. Significant evidence supports the premise that security markets are very efficient. Also called market efficiency. See also random-walk hypothesis, strong form, weak form.
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He touches on technical and fundamental analysis, the efficient market hypothesis, behavioral theories, game theory, risk and diversification, and chaos and complexity theory.
Paulos, John Allen. A mathematician plays the stock market by Downey, Thomas J. / Kliatt
The efficient market hypothesis says in effect that market prices at any given time already reflect all relevant information that can be known or suspected.
Soft science by Currier, Chet / Los Angeles Business Journal
A strong-form efficient market is one that immediately and continually reflects all relevant information, including inside information.
Prediction markets: crystal ball for finance? Also known as 'decision ... by Ray, Russ / Financial Executive
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