The world's biggest online social network knocked the world's largest retailer out of the top 10 list of the highest-valued companies in the Standard & Poor's 500 index on Monday and the gap widened on Tuesday.
Facebook Inc. was valued at $242.7 billion as of late morning trading, its share price up more than 2 percent at $86.59. Wal-Mart Stores Inc., meanwhile, was valued at $233.8 billion, its stock price down 21 cents at $72.58.
Facebook has been on a roll this past year, its shares up about 32 percent in the past year compared with just 8.2 percent for the S&P 500 index. Its quarterly results have consistently surpassed expectations.