 Northwest Bancshares, Inc. NASDAQ:NWBI was the target of a significant decline in short interest in March. As of March 31st, there was short interest totalling 5,670,000 shares, a decline of 12.8 from the March 15th total of 6,504,300 shares. Based on an average trading volume of 685,200 shares, the short-interest ratio is currently 8.3 days. ... 