We investigate the long-term performance of firms added to or deleted from the Hang Seng Index from 1986 to 2008. The stocks newly deleted from the Hang Seng Index have abnormal returns over a 5-year holding period and the newly added stocks do not. The deleted stocks outperform the added...

We investigate the long-term effects of S&P 500 index additions and deletions on a sample of stocks from 1962 to 2003 and find a significant long-term price increase for both added and deleted stocks, with deleted stocks outperforming added stocks. The long-term price increase for added stocks...