RiverNorth Opportunistic Municipal Income Fund, Inc. (NYSE:RMI – Get Rating) saw a significant increase in short interest in May. As of May 31st, there was short interest totalling 9,700 shares, an increase of 385.0% from the May 15th total of 2,000 shares. Based on an average daily volume of 30,300 shares, the short-interest ratio is […]