Interactive Brokers reports September 2026 brokerage metrics

Interactive Brokers Group (NASDAQ: IBKR) reported its electronic brokerage performance metrics for September 2026, according to a company press release.

The firm recorded 4.111 million Daily Average Revenue Trades (DARTs) for the month, a 6% increase from the prior year but 4% lower than the previous month. Client accounts totaled 5.576 million, up 35% year-over-year and 2% from the prior month.

Ending client equity reached $964.7 billion, 27% higher than a year earlier and roughly flat compared to August 2026. Client margin loan balances rose to $105.2 billion, up 36% year-over-year and 4% from the prior month. Ending client credit balances, including $6.4 billion in insured bank deposit sweeps, stood at $186.2 billion, a 20% increase from the prior year.

The average commission per cleared commissionable order was $2.57, inclusive of exchange, clearing, and regulatory fees. By product, the average commission was $1.94 for stocks, $3.67 for equity options, and $4.36 for futures.

For IBKR PRO clients, the total cost of executing and clearing U.S. Reg.-NMS stocks through Interactive Brokers was approximately 1.2 basis points of trade money in September, measured against a daily volume-weighted average price benchmark. The rolling twelve-month net cost was 2.5 basis points.

On other financial items, the mark-to-market on the company's U.S. government securities portfolio was a loss of $307,000 for the quarter ended September 30. The value of the company's GLOBAL currency basket, reported in U.S. dollars, decreased 0.45% in September and fell 0.08% for the quarter.

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