MKS Instruments, Inc. (NASDAQ:MKSI – Get Free Report) saw a significant drop in short interest during the month of July. As of July 31st, there was short interest totalling 1,470,000 shares, a drop of 23.4% from the July 15th total of 1,920,000 shares. Based on an average trading volume of 685,500 shares, the days-to-cover ratio […]