PharmChem, Inc. (OTCMKTS:PCHM – Get Free Report) saw a significant drop in short interest in the month of November. As of November 30th, there was short interest totalling 100 shares, a drop of 66.7% from the November 15th total of 300 shares. Based on an average trading volume of 28,100 shares, the days-to-cover ratio is […]