We examine the role of the disposition effect in market efficiency following the arrival of private signals to a small group of informed traders. Subjects trade an ambiguous asset via a computer-based double auction. Using a 2x2x2 design, we endow two types of signal, i.e., positive vs....

This study examines how competition affects the profitability of mutual funds' trading on the post earnings announcement drift (PEAD). Our results show that while the average fund actively pursuing this strategy does not generate significant outperformance, funds that manage to avoid competition...