Interactive Brokers Reported Rise in September Trading

The brokerage saw DARTs reach 4.111 million, as operators monitor liquidity and client margin trends.

Updated on Oct. 1, 2026 in Economic Indicators

Isometric editorial illustration of a brass scale balancing gold bullion bars against a structural steel lattice, representing financial liquidity. — Interactive Brokers reported a rise in daily average revenue trades to 4.111 million for September 2026, signaling ongoing market participation. AI Illustration. Upload story photo >

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Interactive Brokers recorded 4.111 million daily average revenue trades (DARTs) in September 2026. This performance reflects a 6% increase compared to September 2025, even as trading volume declined 4% from August 2026.

Why it matters

The firm's metrics regarding client equity and margin loans provide a signal of current market participation and leverage levels among active traders. These figures offer context for broader liquidity and capital deployment trends in the financial services sector.

Interactive Brokers registered 5.576 million client accounts, with ending client equity totaling $964.7 billion. The average commission per cleared commissionable order was $2.57, while ending client margin loan balances reached $105.2 billion.

The players

Interactive Brokers

An automated global brokerage firm providing electronic trading and clearing services to individual and institutional investors.

The details

The firm's operating metrics illustrate a snapshot of client activity, including $186.2 billion in ending client credit balances and $6.4 billion in insured bank deposit sweeps. These totals are derived from the firm's monthly trading and account ledger reporting. Operators should note these figures represent the aggregate activity across the firm's global client base.

September 2025: DARTs were 6% lower than in September 2026.
August 2026: DARTs were 4% higher than in September 2026.
September 2026: The firm recorded 4.111 million daily average revenue trades.

Market Landscape

Public brokerages consistently report these monthly metrics to demonstrate scale and shifting investor engagement. This report follows the standard industry pattern for tracking activity against documented historical cycles.

Operators should evaluate how shifts in margin loan balances and trade volumes influence their own cash flow and credit access strategies. Monitor these monthly brokerage filings as a proxy for the broader capital market appetite relevant to your supply chain or financing costs.

The takeaway

The volume of daily revenue trades serves as a primary indicator of market velocity for capital-intensive businesses. Operators should track these metrics monthly to gauge the health of liquidity within the financial services ecosystem.