Bennett, Benjamin; Stulz, René M.; Wang, Zexi - 2020
We investigate the impact on firms of joining the S&P 500 index from 1997 to 2017. We find that the positive … announcement effect on the stock price of index inclusion has disappeared and the long-run impact of index inclusion has become … policies change with index inclusion. For instance, payout policies of firms joining the index become more similar to the …