Vanda Pharmaceuticals Inc. (NASDAQ:VNDA – Get Free Report) saw a significant growth in short interest during the month of September. As of September 15th, there was short interest totalling 4,210,000 shares, a growth of 50.4% from the August 31st total of 2,800,000 shares. Based on an average trading volume of 1,120,000 shares, the short-interest ratio […]