Mark Zuckerberg loses $16.8 billion in a snap as Facebook plunges
His fortune tumbled as shares of Facebook slid 20% in post-market trading on disappointing results.

The social media company has contended for years with criticism about its content policies, its failure to safeguard private data and its changing rules for advertisers. Those problems hadn’t mattered to the success of the business -- until now.
Facebook on Wednesday reported second-quarter sales and user growth that fell short of analysts’ projections. And the company told Wall Street the numbers won’t get any better this year.
Shares plunged as much as 24 percent after Chief Financial Officer David Wehner said revenue growth rates would decline in the third and fourth quarters. Analysts who follow Facebook were blindsided, asking frequently on a conference call with executives for more information on exactly how the company’s financial future had changed so dramatically.
Zuckerberg's fortune tumbled by $16.8 billion . If that holds through Thursday’s close, he will slide to sixth place from third on the Bloomberg Billionaires Index. It would also wipe his $13.7 billion of gains for the year, leaving him with just less than $70 billion.
For many of the world’s richest people, losing $16.8 billion in a day would be a wipeout.
For Mark Zuckerberg, it’s just about a fifth of his net worth.

It’s an evaporation of wealth so big it would have left the following multi-billionaires without a cent to their name:
In fact, it would have wiped out 87 percent of the billionaires in Bloomberg’s index.
All of those problems are hitting amid a harsh truth for the company: Facebook, the social network with 2.23 billion active monthly users, can’t grow forever. “The core Facebook platform is declining,” said Brian Wieser, an analyst at Pivotal Research Group.
Facebook said it had 1.47 billion daily active users in June, compared with the 1.48 billion average of analysts’ estimates compiled by Bloomberg. The company’s user base flatlined in its biggest market, the U.S. and Canada, at 185 million daily users, while declining 1 percent in Europe to 279 million daily users. Overall, average daily users increased 11 percent from the period a year earlier.
Revenue increased 42 percent to $13.2 billion in the quarter. Analysts projected $13.3 billion. The social network still holds one of the world’s most valuable sets of data on what people are interested in, and makes that audience easily available to advertisers. The company remains in a dominant position in mobile advertising alongside Alphabet Inc.’s Google.
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