Cardinal Energy Ltd. (OTCMKTS:CRLFF – Get Rating) was the recipient of a large growth in short interest in May. As of May 15th, there was short interest totalling 4,753,200 shares, a growth of 20.5% from the April 30th total of 3,943,300 shares. Based on an average trading volume of 41,800 shares, the days-to-cover ratio is […]