 International Bancshares Corp NASDAQ:IBOC saw a significant decrease in short interest in the month of March. As of March 31st, there was short interest totalling 862,100 shares, a decrease of 6.1 from the March 15th total of 918,100 shares. Based on an average daily trading volume, of 325,400 shares, the short-interest ratio is presently 2.6 ... 