Pressure BioSciences, Inc. (OTCMKTS:PBIO – Get Free Report) saw a large drop in short interest in the month of May. As of May 15th, there was short interest totalling 4,300 shares, a drop of 50.6% from the April 30th total of 8,700 shares. Based on an average daily trading volume, of 56,600 shares, the short-interest […]