Healthcare Active Movers: Geron Corporation (NASDAQ:GERN), Merck (NYSE:MRK), Valeant Pharmaceuticals (NYSE:VRX), Johnson & Johnson (NYSE:JNJ), Novavax (NASDAQ:NVAX)

Geron Corporation (NASDAQ:GERN) was one of the Nasdaq’s most active movers, jumping 23 per cent to $3.20 on heavy volume after the US Food and Drug Administration lifted a partial clinical hold on a study testing its blood cancer drug. Geron Corporation (NASDAQ:GERN) stock performance was 21.15% in last session and finished the day at…

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Healthcare Active Movers; Pfizer Inc. (NYSE:PFE), Novavax (NASDAQ:NVAX), Arena Pharmaceuticals (NASDAQ:ARNA), MannKind Corporation (NASDAQ:MNKD)

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…

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