Zynga said it will cut about 520 jobs, or roughly one-fifth of its work force, and close some offices in the United States.
Analysts said the latest warning on quarterly bookings, a measure of sales, boded poorly for the “FarmVille” developer, which began trimming staff late last year.
Zynga’s shares slid as much as 15 percent in frantic trade before closing down 12 percent at $2.99, near its four-month low.
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