random walk theory

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• Random Walk Theory — The theory that stock price changes have the same distribution and are independent of each other, so the past movement or trend of a stock price or market cannot be used to predict its future movement. In short, this is the idea that stocks take… …   Investment dictionary

• random-walk theory — The theory that prices on a financial market move, for whatever reason, without any memory of past movements and that the movements therefore follow no pattern. This theory is used to dispute the predictions of chartists, who do rely on past… …   Accounting dictionary

• random-walk theory — The theory that prices on a financial market move, for whatever reason, without any memory of past movements and that the movements therefore follow no pattern. This theory is used to dispute the predictions of chartists, who do rely on past… …   Big dictionary of business and management

• random walk theory —  Stock market theory that past share movements are of no use in predicting future changes …   American business jargon

• Random walk — Theory that stock price changes from day to day are at random; the changes are independent of each other and have the same probability distribution. Many believers of the random walk theory believe that it is impossible to outperform the market… …   Financial and business terms

• random walk — Theory that stock price changes from day to day are accidental or haphazard; changes are independent of each other and have the same probability distribution. Many believers in the random walk theory believe that it is impossible to outperform… …   Financial and business terms

• Random walk hypothesis — The random walk hypothesis is a financial theory stating that stock market prices evolve according to a random walk and thus the prices of the stock market cannot be predicted. It has been described as jibing with the efficient market hypothesis …   Wikipedia

• Random walk — A random walk, sometimes denoted RW, is a mathematical formalization of a trajectory that consists of taking successive random steps. The results of random walk analysis have been applied to computer science, physics, ecology, economics and a… …   Wikipedia

• random walk — 1. Statistics. the path taken by a point or quantity that moves in steps, where the direction of each step is determined randomly. 2. Physics. the tendency of particles in random motion to achieve a net displacement or to drift in a particular… …   Universalium

• random walk — The theory that the *market prices of *common stock (and other items, like *commodities) exhibit unpredictable patterns, and do not reflect historical trends. The theory argues that stock prices behave unpredictably because stock markets are… …   Auditor's dictionary

• Loop-erased random walk — In mathematics, loop erased random walk is a model for a random simple path with important applications in combinatorics and, in physics, quantum field theory. It is intimately connected to the uniform spanning tree, a model for a random tree.… …   Wikipedia