Mark Zuckerberg Headlines

Breakingviews - Facebook’s user black box is cause for concern

Facebook shareholders risk focusing on the wrong problem. They punished Chief Executive Mark Zuckerberg’s $636 billion company in after-hours trading on Wednesday, sending the stock down as much as 7% on the back of fourth-quarter earnings that showed rising costs and slowing sales. A bigger issue, though, is the decision by Zuckerberg’s company to lump together the metrics for its various social-media platforms.

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