Benzinga's Top #PreMarket Losers By: Benzinga via Benzinga April 13, 2015 at 08:24 AM EDT SINA Corporation (NASDAQ: SINA) shares declined 5.09% to $35.60 in pre-market trading. China is threatening to shutdown news service ... Read More >> Related Stocks: Extreme Networks Fireeye Inc Shire Plc Ads Sina Corp Symantec Corp