Short Interest in Groupon, Twitter On The Rise (GRPN, TWTR, ZNGA) By: Benzinga via Benzinga April 11, 2014 at 11:28 AM EDT While late March saw falling interest by short sellers in a number of social media companies based in the United States, Groupon ... Read More >> Related Stocks: Groupon Cl A Sina Corp Twitter, Inc. YY Inc ADR Yelp Inc Zynga Inc Cl A eBay