TIS Inc. (OTCMKTS:TISNF – Get Rating) was the recipient of a large growth in short interest during the month of May. As of May 31st, there was short interest totalling 1,130,300 shares, a growth of 19.2% from the May 15th total of 948,600 shares. Based on an average daily volume of 0 shares, the days-to-cover […]