Information Uncertainty and the Reaction of Stock Prices to News
38 Pages Posted: 13 Feb 2009
Date Written: February 13, 2009
We argue that the behavioral theories suggesting that investors underreact to new information yield sharp testable implications concerning the sluggishness with which stock prices react to the arrival of news, and not concerning price continuation patterns, on which most of the literature has focused so far. Specifically, if underreaction is heightened by uncertainty surrounding the firm, then higher uncertainty will cause prices to react more slowly to news, whereas it may, but need not, cause stronger price continuation. Using data on the post-analyst revisions drift and the post-earnings announcement drift we find scarce evidence in support of this thesis.
Keywords: Overconfidence, Stock price continuation, Stock price reaction to news
JEL Classification: G11, G14
Suggested Citation: Suggested Citation