Delta to join S&P 500 index of stocks

Delta Air Lines Inc. Is scheduled to be listed among the stocks in the Standard & Poor's 500 index next week, a sign of the airline's turnaround since it filed for bankruptcy protection eight years ago.
The S&P index is made up of 500 large US companies whose shares trade on either the New York Stock Exchange or the Nasdaq Stock Market. Companies can benefit from being in the index because investment funds that track the index must buy their stock.
Atlanta-based Delta, the world's second-biggest airline by passenger traffic behind United, will join the index after trading ends Tuesday. It will replace BMC Software Inc., which is being bought by Bain Capital.

Southwest Airlines Co. Is the only carrier now in the S&P index.