GREENWICH, Conn.--(BUSINESS WIRE)--Interactive Brokers Group, Inc. (NASDAQ GS: IBKR), an automated global electronic broker and market maker, today reported its Electronic Brokerage monthly performance metrics for June. Highlights for the month included: 600 thousand Daily Average Revenue Trades (DARTs), 21% higher than prior year and 3% lower than prior month. Ending client equity of $66.0 billion, 22% higher than prior year and 1% lower than prior month. Ending client margin loan balances of