Ensco to Replace BellSouth in S&P 500

Standard & Poor's said offshore drilling contractor Ensco International Inc. will replace BellSouth Corp. in its widely followed S&P 500 index after trading ends Wednesday. BellSouth was acquired by rival AT&T Inc. in a deal completed Friday. Replacing Ensco in the S&P MidCap 400 will be oil and gas explorer Cimarex Energy Co. Hornbeck Offshore Services Inc., which supplies vessels to the oil and gas industry, takes Cimarex's spot in the S&P SmallCap 600.(Source: Business Week)