Facebook shares plunged 19 percent on Thursday (July 26th), costing the company some $119 billion in market value, the biggest single-day loss in stock market history. The drop came after Facebook warned a day earlier that revenue growth would slow as the company focuses on protecting user privacy in the wake of the backlash over the Cambridge Analytica scandal. Facebook is also continuing to deal with the fallout from enabling fake news and election interference during the 2016 presidential campaign. Yesterday’s stock decline cost Facebook founder and CEO Mark Zuckerberg almost $16 billion, dropping him from fourth to sixth on the list of richest people in the world.