Vetr Top Raters Upgrade Groupon, Rate As 3.5 Star Stock By: Benzinga via Benzinga January 28, 2016 at 15:19 PM EST Shares of Groupon Inc (NASDAQ: GRPN) have lost nearly 10 percent since the start of 2016 and have fallen around 60 percent over the past ... Read More >> Related Stocks: Groupon Cl A