Social and Behavioral Sciences Commons^™

The Search For Stock Market Bubbles: An Examination Of The Nyse Index, Andrew J. Economopoulos, Avinash G. Shetty

Business and Economics Faculty Publications

Many have put forth reasons why the stock market has climbed to new and unprecedented heights. Two reasons are examined: (1) investors are expecting prices to increase and are bidding up price irrationally; (2) investors have moved to a long-term strategy and are requiring a lower risk premium. For the latter reason, the rise in stock prices is due to a change in the fundamentals, and for the former reason the rise represents the classical bubble. The evidence indicates that risk preferences have changed while price momentum does not appear during bubble periods.