A Comparison of the Skewness of Stock Return Distributions in Earnings Announcement and Non-Announcement Periods

This paper presents evidence that stock return prediction errors are less positively skewed in the time period surrounding accounting earnings report announcements than in a subsequent non-announcement period. Assuming that information available about firms in non-announcement periods depends on discretionary disclosure practices of firms and discretionary search for information by investors, the results suggest that earnings reports cause more extreme “bad news” to be reflected in stock prices relative to discretionary sources of information.