Ivanov, Stoyu I.; Leong, Kenneth; Zaima, Janis K. - In: Economics Bulletin 34 (2014) 1, pp. 605-613
Although some studies have documented that there is a price increase for firms added to the S&P 500 Index other studies … show mixed results. A more recent research suggests that managers are under greater scrutiny once they are added to the S&P …500, and work harder to improve firm performance. They examine the earnings performance of the firms included in the S&P …