Invinity Energy Systems plc (OTCMKTS:IESVF – Get Free Report) was the recipient of a large growth in short interest in May. As of May 15th, there was short interest totalling 24,000 shares, a growth of 34.1% from the April 30th total of 17,900 shares. Based on an average daily volume of 42,900 shares, the short-interest […]