
Mark Zuckerberg (center), Facebook founder, chairman and CEO, applauds at the opening bell of the Nasdaq stock market on May 18, 2012, from Facebook headquarters in Menlo Park, Calif. (Associated Press/Nasdaq via Facebook, Zef Nikolla)

Mark Zuckerberg (center), Facebook founder, chairman and CEO, applauds at the opening bell of the Nasdaq stock market on May 18, 2012, from Facebook headquarters in Menlo Park, Calif. (Associated Press/Nasdaq via Facebook, Zef Nikolla)

Mark Zuckerberg (center), Facebook founder, chairman and CEO, applauds at the opening bell of the Nasdaq stock market on May 18, 2012, from Facebook headquarters in Menlo Park, Calif. (Associated Press/Nasdaq via Facebook, Zef Nikolla)

Passers-by are reflected in the window of the Nasdaq media center as they view reports of trading activity on Facebook's stock on the Nasdaq stock market in New York. The botched offering of Facebook stock has raised several troubling questions. The stock fell $3.07 to close at $28.84 on Tuesday. (Associated Press)

Passers-by are reflected in the window of the Nasdaq media center as they view reports of trading activity on Facebook's stock on the Nasdaq stock market in New York. The botched offering of Facebook stock has raised several troubling questions. The stock fell $3.07 to close at $28.84 on Tuesday. (Associated Press)

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)

A favorable report on jobless claims was a bit of good news in a gloomy economic picture that led to gains on Wall Street on Thursday. The Dow, Standard & Poor's and Nasdaq all closed in positive territory. (Associated Press)