Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH – Get Rating) saw a significant decline in short interest in the month of March. As of March 15th, there was short interest totalling 1,460,000 shares, a decline of 16.6% from the February 28th total of 1,750,000 shares. Currently, 4.1% of the shares of the company are sold short. Based on […]