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