Short positions as of end Sept 80 This may explode the other way with a simple positive trigger.....hold it won't be long now!!!!! Sept 30th, there was short interest totaling 20,480,000 shares, a drop of 16.4% from the previous total of 24,510,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.