 Arizona State Retirement System lessened its stake in International Bancshares Corp NASDAQ:IBOC by 9.7 during the fourth quarter, HoldingsChannel.com reports. The firm owned 32,534 shares of the banks stock after selling 3,476 shares during the period. Arizona State Retirement Systems holdings in International Bancshares were worth 1,401,000 as of its most recent SEC filing. Several ... 