https://www.cnbc.com/2018/03/21/facebook-shares-slide-as-cambridge-analytica-fallout-continues.html

Facebook shares fell over 2 percent in pre-market trade Wednesday, marking the third straight day of declines for the social media giant as the fallout from the data breach scandal continues.

Nearly $50 billion of market capitalization, or value, has been wiped off Facebook's stock since Monday.