KEY POINTS
  • Facebook shares fell following a New York Times investigation that revealed previously unreported data sharing practices by the company.
  • Through a review of internal documents, the Times found Facebook shared even more data than previously thought with companies it considered "partners."
  • The data reportedly included access to users private messages.
Facebook founder and CEO Mark Zuckerberg arrives to testify following a break during a Senate Commerce, Science and Transportation Committee and Senate Judiciary Committee joint hearing about Facebook on Capitol Hill in Washington, DC.

Facebook tumbled 7.3 percent Wednesday following a spate of bad news, including revelations that it shared more user data than previously thought and a lawsuit from the Washington, D.C., attorney general.

The drop is the second-steepest this year for Facebook, following a 19 percent drop on July 26 after an earnings report warning of slowing sales. Before Wednesday's Federal Reserve meeting, Facebook had been the only major tech stock in the negative. By the end of the day, it suffered the worst fall among its peers as the Nasdaq Composite Index closed down 2.17 percent.