Attention to Market Information and Underreaction to Earnings on Market Moving Days

Post-earnings announcement drift (PEAD) is stronger in firms that release earnings on days when market returns are higher in magnitude. This drift remains robust after controlling for previously documented factors such as Friday releases, the number of simultaneous releases, and price delay measure. Negative earnings surprises drive this drift, and the drift is more pronounced among small stocks, value stocks, and stocks that have low analyst following. Slower analyst response to earnings contributes to the drift. These findings are consistent with investors paying more attention to market information and less attention to firm-specific information due to attention constraints.