Groupon Inc Up, Yelp Inc Down: Competition At Issue? By: Benzinga via Benzinga September 03, 2014 at 15:33 PM EDT Groupon Inc (NASDAQ: GRPN) shares rose slightly, possibly at the expense of Yelp Inc(NYSE: YELP) shares, which were ... Read More >> Related Stocks: Groupon Cl A The Priceline Group Yelp Inc