https://qz.com/1341382/facebook-loses-120-billion-in-market-capitalization-in-a-single-day-fb/

Facebook lost more value today (July 26) than any other publicly traded US company ever.

Its share price began to tank in after-hours trading last night when the company posted second-quarter earnings that came in below analysts’ expectations. Then chief financial officer David Wehner said recent adjustments and challenges to Facebook’s business, many a result of a scandal-scarred past few months and years, could have a negative impact on revenue for the next few quarters. And the stock price sank even further.