Pfizer Inc (NYSE:PFE) was the target of a large growth in short interest in the month of May. As of May 15th, there was short interest totalling 59,856,772 shares, a growth of 14.0% from the April 30th total of 52,494,773 shares, StockRatingsNetwork.com reports. Currently, 0.9% of the shares of the company are sold short. Pfizer Inc. (NYSE:PFE) stock performance was -1.14% in last session and … Continue reading Healthcare Active Movers; Pfizer Inc. (NYSE:PFE), Novavax (NASDAQ:NVAX), Arena Pharmaceuticals (NASDAQ:ARNA), MannKind Corporation (NASDAQ:MNKD)