Fibra Danhos (OTCMKTS:GRFFF – Get Free Report) saw a large growth in short interest during the month of May. As of May 15th, there was short interest totalling 31,500 shares, a growth of 370.1% from the April 30th total of 6,700 shares. Based on an average daily trading volume, of 126,900 shares, the short-interest ratio […]