Regeneron Is Now A Sell For Chardan By: Benzinga via Benzinga January 25, 2016 at 08:40 AM EST Regeneron Pharmaceuticals Inc. (NASDAQ: REGN) shares have been trending south so far in 2016 and are down 11 percent since ... Read More >> Related Stocks: Amgen Novartis Ag ADR Ophthotech Corp Regeneron Pharmaceuticals Sanofi-Aventis S.A. ADR