Benzinga's Top #PreMarket Losers By: Benzinga via Benzinga October 08, 2015 at 08:18 AM EDT Groupon Inc (NASDAQ: GRPN) shares tumbled 3.40 percent to $3.69 in pre-market trading after surging 8.83 percent on Wednesday. ... Read More >> Related Stocks: Domino's Pizza Inc Groupon Cl A Micron Technology Tesla, Inc. Vodafone Grp Plc ADR