Short Interest in Biotech Remains Mixed (ALXN, AMGN, ARNA, BIIB, CELG, DNDN, GILD, ILMN, ONXX, PCYC, REGN, VRTX, VVUS, IBB)
ThinkstockWe have tracked the key short interest changes in the following biotech and emerging pharma companies: Alexion Pharmaceuticals Inc. (NASDAQ: ALXN), Amgen Inc. (NASDAQ: AMGN), Arena Pharmaceuticals Inc. (NASDAQ: ARNA), Biogen Idec Inc. (NASDAQ:…