Ocean Thermal Energy Co. (OTCMKTS:CPWR – Get Rating) saw a large decrease in short interest during the month of May. As of May 15th, there was short interest totalling 9,800 shares, a decrease of 51.0% from the April 30th total of 20,000 shares. Based on an average daily trading volume, of 149,900 shares, the days-to-cover […]