Copper Mountain Mining Co. (OTCMKTS:CPPMF – Get Rating) was the recipient of a significant increase in short interest in May. As of May 31st, there was short interest totalling 904,200 shares, an increase of 59.7% from the May 15th total of 566,200 shares. Based on an average trading volume of 171,100 shares, the days-to-cover ratio […]