If you're interested, the National Bureau of Economic Research has some pretty interesting work on the subject: Stock Price Reactions to Index Inclusion: http:

If you're interested, the National Bureau of Economic Research has some pretty interesting work on the subject: Stock Price Reactions to Index Inclusion: http://www.nber.org/digest/nov13/w19290.html http://www.nber.org/digest/nov13/w19290.html The Mysterious Growing Value of S&P 500 Membership: http://www.nber.org/papers/w8654 http://www.nber.org/papers/w8654 Big Picture: Inclusion in an index does have some +ve effect on price