 Ensign Energy Services Inc. OTCMKTS:ESVIF was the target of a large decline in short interest during the month of September. As of September 30th, there was short interest totalling 1,551,700 shares, a decline of 18.3 from the September 15th total of 1,899,700 shares. Based on an average trading volume of 9,000 shares, the days-to-cover ratio ... 