Rock Tech Lithium Inc. (OTCMKTS:RCKTF – Get Rating) was the target of a significant increase in short interest in April. As of April 15th, there was short interest totalling 13,700 shares, an increase of 48.9% from the March 31st total of 9,200 shares. Based on an average daily volume of 7,900 shares, the short-interest ratio […]