Twitter growth grinds to a full stop, Wall Street reacts accordingly

"On Wednesday, after many quarters of slowing user growth, Twitter said its monthly visitors in the fourth quarter totaled 320 million - exactly the same as the company reported in the previous quarter," reports Mike Isaac in the New York Times. "While the number was up 9 percent from a year ago, when monthly active users stood at 288 million, the figures showed that Mr. Dorsey's recent moves have made little impact in attracting users."

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