https://finance.yahoo.com/news/ftc-investigating-facebooks-privacy-practices-145741554--finance.html

Facebook shares briefly dipped below $150 on Monday for the first time since July 2017, before recouping some losses. They were down 3.1 percent at $154.37 in afternoon trading.

At the day's session low the company had lost $100 billion in market value since March 17, when newspapers first reported that Facebook member data was improperly used by consultants Cambridge Analytica to target U.S. and British voters in close-run elections.