Monitors show the value of the Facebook, Inc. stock during morning trading at the NASDAQ Marketsite in New York, May 21, 2012. Facebook shares sank on Monday in the first day of trading without the full support of the company's underwriters, leaving some investors down 25 percent from where they were Friday afternoon. REUTERS/Brendan McDermid (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY)

Facebook's stock fell 11 percent on its second day of trading even as the rest of the stock market rallied.

Facebook's stock fell 11 percent on its second day of trading even as the rest of the stock market rallied.