Efficient Markets Hypothesis. The hypothesis that securities are typically in equilibrium-that they are fairly priced in the sense that the price reflects all publicly available information on each security.

Efficient Market Hypothesis. A hypothesis that U.S. equity markets are efficient. Bloopers & Blunders: Reasoning for the Surge in the Dow. Finance By Example (Archives): Bubbles in History: Is There Something To Be Learned? Evidence: Few Brokerage Firms Beat the Market Last Year The Stampede To Index Funds Internet Chat and Market Efficiency Two Analysts’ Forecasts Diverge by 2,000 Points! Humor

See Efficient Market Hypothesis

Efficient Market Hypothesis (also referred to as EMT, or Efficient Market Theory); a model of securities pricing that suggests that current information is included in the current price, and that the fair price for a security is therefore whatever it is currently trading at. There are three forms of EMH that differ in what types of information are included.

Efficient markets hypothesis. The view that security or stock prices reflect all available information and it is impossible for an investor to consistently 'beat the market'.