Benzinga's Top #PreMarket Losers By: Benzinga via Benzinga March 24, 2015 at 08:20 AM EDT Sonus Networks, Inc. (NASDAQ: SONS) shares declined 33.21% to $8.79 in pre-market trading after the company lowered its outlook and ... Read More >> Related Stocks: Century Aluminum C China Finance Online ADR Freeport-McMoRan