With the recent news of Delta joining the S&P 500, I was thinking, looking at market caps for various U.S. airlines, presently United Continental Holdings (NYSE: UAL) has a higher market capitalization at $11.46B than Southwest Airlines at $9.7B. It is a bit surprising that United Continental Holdings wasn't added to the index. Perhaps they will be added in the next selection.
So, is there a chance of United possibly booting Southwest from the S&P 500?
[Edited 2013-09-10 10:14:16]