First Trust Nasdaq Oil & Gas ETF (NASDAQ:FTXN - Get Rating) was the target of a large decline in short interest in September. As of September 30th, there was short interest totalling 40,100 shares, a decline of 65.4% from the September 15th total of 115,900 shares. Based on an average trading volume of 171,600 shares, the days-to-cover ratio is presently 0.2 days.