This paper re-examines the Ou and Penman (1989) conclusion that fundamental analysis identifies equity values not currently reflected in stock prices, and thus systematically predicts abnormal returns. Their fundamental summary measure Pr, the estimated probability of an earnings increase, also proxies for firm size and CAPM risk. After controlling cross-sectional differences in CAPM beta and firm size, no significant incremental predictive ability is attributable to Pr. The Pr measure is interpreted as a proxy for expected return differences rather than as new evidence of a systematic market underreaction to the future earnings signal inherent in current financial statements.

This study documents that the market's responsiveness to earnings announcements declines significantly after the issuance of qualified audit reports for a sample of ‘subject to’ qualifications and consistency qualifications. The results are consistent with a hypothesis that audit qualifications reduce the market's responsiveness to earnings announcements by altering the market's perception of earnings noise or the persistence of earnings, or both. Alternatively, a decline in earnings response coefficients may be observed because audit qualifications are more likely in firms that have undergone economic or structural changes and these changes, rather than the qualification per se, lead to decreased persistence or increased noise.

This study separates trading volume into buyer- and seller-initiated activities and examines the directional volume reaction in small and large trades to different types of earnings news. ‘Good’ (‘bad’) news triggers brief, but intense, buying (selling) in the large trades. However, a persistent period of unusually high buying activity is observed in the small trades irrespective of the news. This anomalous proclivity of small traders to buy is robust across firm size, trading volume, and different earnings expectation models. Several explanations are discussed, although the behavior does not seem fully explained by existing theories.