Greystone Logistics, Inc. (OTCMKTS:GLGI – Get Rating) saw a significant increase in short interest in May. As of May 15th, there was short interest totalling 1,400 shares, an increase of 600.0% from the April 30th total of 200 shares. Based on an average daily volume of 6,500 shares, the days-to-cover ratio is currently 0.2 days. […]