A pharmaceutical company announces that it has received Federal Drug Administration approval for a new allergy drug that completely prevents hay fever. The consensus analyst forecast for the company's earnings per share (EPS) is $4.50, but insiders know that, with this new drug, earnings will increase and drive the EPS to $5.00. What will happen when the company releases its next earnings report?

The concept of market efficiency underpins almost all financial theory and decision models. When financial markets are efficient, the price of a security-such as a share of a particular corporation's common stock-should be the present value estimate of the firm's expected cash flows discounted by its appropriate rate of equal to ed the intrinsic value of the stock more than Almost all financial theory and decision models assume that the financial markets are efficient. The informational efficiency of financial markets determines the ability of investors to "beat" the market and earn excess (or abnormal) returns on their investments. If the markets are efficient, they will react rapidly as new relevant information becomes available. Financial theorists have identified three levels of informational efficiency that reflect what information is incorporated in stock prices