Interactive Brokers Group has released its monthly electronic brokerage performance metrics for May 2026. The report indicates significant growth across several key performance indicators for the month.

In May 2026, the daily average revenue trades for Interactive Brokers reached 4.969 million, marking a 47% increase compared to the same period last year and a 17% rise from the previous month. End-of-period client equity climbed to $937.3 billion, up 49% year-over-year and 8% sequentially. End-of-period client margin loan balances grew to $100.9 billion, a 65% increase year-over-year and an 11% increase from April.

End-of-period client credit balances totaled $180.1 billion, which includes $6.4 billion in insured bank deposit sweep balances. This represents a 34% year-over-year increase and a 3% sequential increase. The number of client accounts reached 4.995 million, growing 32% from the prior year and 3% from the prior month. On an annualized basis, cleared average daily trades per account were 216.

Regarding trading costs, the average commission per cleared commissionable order was $2.60, which includes exchange, clearing, and regulatory fees. For stock orders, the average was 664 shares per order with a commission of $2.10. For stock options, the average was 6.4 contracts per order with a commission of $3.77. For futures, the average was 3.0 contracts per order with a commission of $4.15.

As part of its monthly disclosures, Interactive Brokers also published Reg-NMS execution statistics to quantify the total cost of trade execution for its professional clients (IBKR PRO). The data shows that the average trade size for client U.S. Reg-NMS stocks in May was $23,083.

Based on the firm's measurement against the daily volume-weighted average price, the total cost for IBKR PRO clients to execute and clear U.S. Reg-NMS stocks through Interactive Brokers was approximately 3.0 basis points of the trade amount. The rolling 12-month average net cost was 2.2 basis points.

Interactive Brokers continues to maintain a conservative balance sheet strategy. The dollar value of its globally diversified currency basket, GLOBAL, decreased by 0.14% in May. The previously reported first-quarter financial results showed net revenue increased 17% year-over-year to $1.669 billion, and net income rose 21.47% to $1.171 billion.