Interactive Brokers Group Reports Brokerage Metrics for December 2011

Interactive Brokers Group, Inc.

today reported its Electronic Brokerage monthly performance metrics for December. Highlights for the month included: * 374 thousand Daily Average Revenue Trades (DARTs), 12% higher than prior year and 22% lower than prior month. * Ending customer equity of $25.1 billion, 14% higher than prior year and 1% lower than prior month. * Ending customer margin loan balances of $7.0 billion, flat to prior year and to prior month. * Ending customer credit balances of $16.6 billion, 16% higher than prior year and 1% higher than prior month. * 189 thousand customer accounts, 20% higher than prior year and 1% higher than prior month. * 459 annualized average cleared DARTs per customer account.