Interactive Brokers Client Assets Reach $907B in July as Trading Volume Slips

Interactive Brokers reported continued growth in client accounts and assets for July, even as trading activity declined from the previous month but remained well above year-earlier levels. 

The broker stated that client accounts reached 5.317 million at the end of July, a 34% increase compared to the same month last year, while ending client equity rose 32% year-over-year to $906.7 billion. 

Daily Average Revenue Trades (DARTs) totaled 4.426 million in July, up 27% from July 2025 but down 16% from June. Client margin loan balances increased to $100.7 billion, up 49% from a year earlier, and client credit balances reached $180.5 billion, a 25% annual increase, though both declined month-over-month. The July operating metrics follow the company’s second-quarter financial results, when Interactive Brokers reported net revenue of $1.9 billion, up 28% from a year earlier, driven by continued growth in customer accounts and trading activity. 

The broker also published execution statistics for its IBKR Pro clients, noting that the average U.S. Reg.-NMS stock trade was valued at $23,449 in July, with an all-in cost of executing and clearing those trades at approximately 4.0 basis points, compared to a rolling 12-month average of 2.5 basis points. 

The latest figures come after Interactive Brokers expanded its prediction markets offering earlier this year, integrating contracts from Kalshi, CME Group and ForecastEx into a single trading interface.