Groupon, Zynga Buck Social Media Short Interest (GRPN, LNKD, ZNGA) By: Benzinga via Benzinga March 13, 2014 at 09:44 AM EDT Late February saw declining interest by short sellers in several social media companies based in the United States. However, ... Read More >> Related Stocks: Groupon Cl A Sina Corp YY Inc ADR Yelp Inc Zynga Inc Cl A eBay