fficient markets hypothesis

ept of market efficiency underpins almost all financial theory and decision models. When financial markets are efficient, the price of a security a share of a particular corporation's common stock ${?}^{TT}-$should be the present value estimate of the firm's expected cash flows d by its appropriate rate of return $($also called the intrinsic value of the stock$).$

I financial theory and decision models assume that the financial markets are efficient. The informational efficiency of financial markets es the ability of investors to "beat" the market and earn excess $($or abnormal$)$ returns on their investments. If the markets are efficient, they rapidly as new relevant Information becomes available. Financial theorists have identified three levels of informational efficiency that reflect mation is incorporated in stock prices.

e form of capital market efficiency under the efficient market hypothesis described in the following statement: