The association between accounting earnings and security returns for large and small firms

Abstract

The differential information hypothesis advanced by Atiase (1980) states that information production and dissemination by private parties for the purpose of identifying mispriced securities is an increasing function of firm size. This study examines two corollaries of that hypothesis. First, security prices of large firms anticipate accounting earnings earlier than security prices of small firms. Second, for a given level of ‘unexpected’ earnings, the cumulative abnormal returns of small firms exceed those of large firms. The results are generally consistent with Atiase's hypothesis.