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CeBIT Technology Trade Fair 2018
The Facebook logo is displayed at the 2018 CeBIT technology trade fair.
Alexander Koerner—Getty Images

It’s official. Facebook Inc. just had the biggest stock-market wipeout in American history. Shares tumbled 19 percent on Thursday to close at $176.26 after sales and user growth disappointed investors. The drop translates to a $119.4 billion decline in market capitalization, the largest-ever loss of value in one day for a U.S. traded company.