Aqua Metals, Inc. (NASDAQ:AQMS – Get Rating) saw a large increase in short interest during the month of May. As of May 15th, there was short interest totalling 4,820,000 shares, an increase of 5.7% from the April 30th total of 4,560,000 shares. Based on an average daily volume of 261,500 shares, the short-interest ratio is […]