Short Interest Swings in Biotech Stocks (CELG, GILD, REGN)

The short interest in biotech and emerging pharmaceutical companies was mixed again in the first two weeks of December. The number of shares sold short in Amgen (NASDAQ: AMGN ), Arena Pharmaceuticals (NASDAQ: ARNA ), Dendreon (NASDAQ: DNDN ) and Illumina (NASDAQ: ILMN ) grew