Western Alliance Bancorporation (NYSE:WAL – Get Free Report) saw a large drop in short interest in September. As of September 15th, there was short interest totalling 7,270,000 shares, a drop of 18.1% from the August 31st total of 8,880,000 shares. Based on an average daily volume of 2,050,000 shares, the short-interest ratio is currently 3.5 […]