8. The efficient markets hypothesis

True or False: The efficient markets hypothesis holds only if all investors are rational.

False

True

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.

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

Current market prices reflect all relevant publicly available information.

This statement is consistent with:

Strong form efficiency

Weak form efficiency

Semistrong form efficiency

Consider that there is a semistrong form of efficiency in the markets.

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 companys 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?

There will be some volatility in the stock price when the earnings report is released; it is difficult to determine the impact on the stock price.

The stock price will increase and settle at a new equilibrium level.

The stock price will not change, because the market already incorporated that information in the stock price when the announcement was made.