(Bloomberg) -- Apple Inc. suffered its worst stock decline in a month following a report that Chinese government agencies have barred staff from using the iPhone and other foreign-branded devices at work.Most Read from BloombergIndia’s Moment Has Arrived, and Modi Wants a New Global OrderFed Set to Double Its Economic Growth Forecast After Strong US DataSoaring US Dollar Raises Alarm as China, Japan Escalate FX PushbackChina Slowdown Means It May Never Overtake US Economy, Forecast ShowsHuawei T