 Gabelli Healthcare WellnessRx Trust Closed-Ended Fund NYSE:GRX saw a large drop in short interest during the month of August. As of August 31st, there was short interest totalling 6,900 shares, a drop of 33.0 from the August 15th total of 10,300 shares. Based on an average daily trading volume, of 52,400 shares, the days-to-cover ... 