Short Sellers Move On Amgen, Vertex (AMGN, PCYC, VRTX)

Among leading biotech and emerging pharmaceutical companies, short sellers moved on Amgen (NASDAQ: AMGN ), Pharmacyclics (NASDAQ: PCYC ) and Vertex Pharmaceuticals (NASDAQ: VRTX ) the most strongly in late September. The number of shares sold short in Dendreon (NASDAQ: DNDN ) and Biogen Idec (NASDAQ: