Powertap Hydrogen Capital Corp. (OTCMKTS:MOTNF – Get Rating) was the target of a large growth in short interest in the month of May. As of May 31st, there was short interest totalling 62,300 shares, a growth of 183.2% from the May 15th total of 22,000 shares. Based on an average daily volume of 104,300 shares, […]