Facebook Shares Tumble on Growth Concerns

Selloff is among the biggest-ever single-day drops in market value

Facebook's current data crisis involving Cambridge Analytica has angered users and prompted government investigations. To understand what's happening now, you have to look back at Facebook's old policies from 2007 to 2014. WSJ's Shelby Holliday explains. Illustration: Laura Kammerman

Akane Otani and

Deepa Seetharaman

Updated July 26, 2018 12:50 p.m. ET

Facebook Inc. shares tumbled Thursday after the social-media company warned that its growth is slowing, knocking down a stock that had been a pillar for the market.

Facebook shares fell 18% to $178.05 in midday trading, erasing about $95 billion in the company’s public market value. The loss in market cap is among the biggest-ever single-day drops. Including all shares outstanding, such as those owned by company officers and controlling interests, the drop represents a more than $110 billion loss in value.

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