

** FILE ** In this Oct. 10, 2011, file photo, a magnifying glass is posed over a monitor displaying a Facebook page in Munich. Regulators are examining whether Morgan Stanley, the investment bank that shepherded Facebook through its highly publicized stock offering last week, selectively informed clients of an analyst's negative report about the company before the stock started trading. (AP Photo/dapd, Joerg Koch)

** FILE ** In this Oct. 10, 2011, file photo, a magnifying glass is posed over a monitor displaying a Facebook page in Munich. Regulators are examining whether Morgan Stanley, the investment bank that shepherded Facebook through its highly publicized stock offering last week, selectively informed clients of an analyst's negative report about the company before the stock started trading. (AP Photo/dapd, Joerg Koch)

Television correspondent Sabrina Quagliozzi reports from inside the Nasdaq MarketSite in New York's Times Square on Monday. Facebook's stock fell below its $38 IPO price in the social network's second day of trading as a public company on Monday. (Associated Press)

Television correspondent Sabrina Quagliozzi reports from inside the Nasdaq MarketSite in New York's Times Square on Monday. Facebook's stock fell below its $38 IPO price in the social network's second day of trading as a public company on Monday. (Associated Press)

Facebook founder and CEO Mark Zuckerberg and Priscilla Chan, his longtime girlfriend, were married in Palo Alto, Calif., on Saturday, May 19, 2012. (AP Photo/Facebook, Allyson Magda Photography)

Facebook founder and CEO Mark Zuckerberg and Priscilla Chan, his longtime girlfriend, were married in Palo Alto, Calif., on Saturday, May 19, 2012. (AP Photo/Facebook, Allyson Magda Photography)

In this image provided by Facebook, Facebook founder, chairman and CEO Mark Zuckerberg, center, applauds at the opening bell of the Nasdaq stock market, Friday, May 18, 2012, from Facebook headquarters in Menlo Park, Calif. (AP Photo/Nasdaq via Facebook, Zef Nikolla)

In this image provided by Facebook, Facebook founder, chairman and CEO Mark Zuckerberg, center, applauds at the opening bell of the Nasdaq stock market, Friday, May 18, 2012, from Facebook headquarters in Menlo Park, Calif. (AP Photo/Nasdaq via Facebook, Zef Nikolla)

In this image provided by Facebook, Facebook founder, chairman and CEO Mark Zuckerberg, center, applauds at the opening bell of the Nasdaq stock market, Friday, May 18, 2012, from Facebook headquarters in Menlo Park, Calif. (AP Photo/Nasdaq via Facebook, Zef Nikolla)