 MacroGenics, Inc. NASDAQ:MGNX was the recipient of a significant growth in short interest during the month of September. As of September 30th, there was short interest totalling 4,000,000 shares, a growth of 18.0 from the September 15th total of 3,390,000 shares. Based on an average daily volume of 500,500 shares, the short-interest ratio is presently ... 