Short Sellers Retreat From Biogen Idec, Move On Pharmacyclics (BIIB, BMRN, PCYC)

Among leading biotech and emerging pharmaceutical companies, short sellers retreated from Biogen Idec (NASDAQ: BIIB ) by the largest percentage in early October. Amgen (NASDAQ: AMGN ), Illumina (NASDAQ: ILMN ), Regeneron Pharmaceuticals (NASDAQ: REGN ) and Seattle Genetics (NASDAQ: SGEN ) saw short interest decline