 Aclaris Therapeutics Inc NASDAQ:ACRS saw a significant decrease in short interest in the month of July. As of July 15th, there was short interest totalling 1,240,000 shares, a decrease of 9.5 from the June 30th total of 1,370,000 shares. Approximately 4.0 of the companys stock are sold short. Based on an average trading volume of ... 