12 words cost Facebook $18 billion in valuation

“We did see a decrease in daily users specifically among younger teens.”

Everything was going so well. Revenue was up. Profit was up. Users were up. The stock was up.

Then Facebook CFO David Ebersman said that the social network was seeing a slight decrease in usage by younger teens on the company’s earnings call. And the stock slid from $57.10 all the way down to $47.40, wiping out billions in stock market valuation:

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