https://www.cnbc.com/2018/07/26/heres-what-every-major-wall-street-analyst-had-to-say-about-facebook.html

Facebook shares tanked after the social media giant's report on daily active users fell short of expectations and the company warned revenue growth would slow the rest of the year.

As of Thursday morning, the Facebook's stock was set for its worst day ever, with shares down nearly 20 percent in premarket trading.