Facebook has a new friend: the S&P 500. Standard & Poor's announced Wednesday that the social networking giant will be added to the benchmark index after the market closes on December 20 ...

Fortune Magazine is out with its annual list of America's top 500 companies and "CBS This Morning ... that's had a market cap that large," he said. Facebook has a similar story.

Facebook (FB) exceeded $500 billion in market value for the first time ever Thursday morning as Mark Zuckerberg's company continued its rapid ascent. Amazon (AMZN) hit the $500 billion milestone ...