Inefficiency in Analysts' Earnings Forecasts: Systematic Misreaction or Systematic Optimism?

John C. Easterwood and Stacey R. Nutt

Journal of Finance, 1999, vol. 54, issue 5, 1777-1797

Abstract: A rational analysis of analyst behavior predicts that analysts immediately and without bias incorporate information into their forecasts. Several studies document analysts' tendency to systematically underreact to information. Underreaction is inconsistent with rationality. Other studies indicate that analysts systematically overreact to new information or that they are systematically optimistic. This study discriminates between these three hypotheses by examining the interaction between the nature of information and the type of reaction by analysts. The evidence indicates that analysts underreact to negative information, but overreact to positive information. These results are consistent with systematic optimism in response to information.

Date: 1999
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