The Size Effect and the Value Effect in the American Stock Market

Abstract

This article aims to investigate the efficiency of the SP500 indexes over the 1996-2021 period. In our study, we also analysed the possible link between the size effect, the value effect and the business cycles. The results show the existence of a size effect and a reversed value effect during the whole period. However, when considering the sub periods, the anomalies are not persistent. These results indicate the importance of considering the market as a whole when studying efficiency.