Biogen Inc. (NASDAQ:BIIB – Get Free Report) was the target of a large growth in short interest in the month of May. As of May 15th, there was short interest totalling 3,480,000 shares, a growth of 10.5% from the April 30th total of 3,150,000 shares. Based on an average daily volume of 1,220,000 shares, the […]