http://www.washingtonpost.com/blogs/the-switch/wp/2018/03/26/facebooks-stock-falls-as-the-federal-trade-commission-confirms-its-investigating-the-company/

The Federal Trade Commission confirmed Monday that it has opened an investigation of Facebook after reports that a data analysis firm used by Donald Trump's campaign improperly accessed the names, “likes” and other personal information from at least 30 million users on the social site.

The rare announcement sent Facebook’s stock tumbling — at one point Monday morning down more than 6 percent — as the company faced potential new punishment by the U.S. government, including fines that could reach well into the millions of dollars.