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Can IBKR's Strong September Metrics Support Further Growth?
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Key Takeaways
Interactive Brokers' client accounts rose 35% year over year to 5.6 million in September 2026.
IBKR's margin loans climbed 36% year over year to $105.2 billion, supporting interest income.
IBKR's automated platform and competitive execution costs provide a foundation for scalable growth.
Interactive Brokers Group, Inc. (IBKR - Free Report) reported solid brokerage metrics for September 2026, with client accounts, equity and margin balances posting strong year-over-year growth. Although Daily Average Revenue Trades (DARTs) declined sequentially, trading activity remained above the prior-year level, highlighting continued client engagement.
IBKR’s Client and Margin Growth Strengthen Revenue Outlook
Interactive Brokers ended September with 5.6 million client accounts, up 35% year over year. Client accounts also increased 2% from August. Ending client equity increased 27% year over year to $964.7 billion. Client credit balances rose 20% year over year to $186.2 billion, including $6.4 billion in insured bank deposit sweeps.
Ending client margin loan balances grew 36% year over year to $105.2 billion. The increase in margin loans was the strongest growth among the major balance-sheet-related brokerage metrics, providing a favorable backdrop for interest income, while rising client assets and accounts create a larger base for future trading activity.
September DARTs rose 6% year over year to 4.1 million despite a 4% decline from August 2026. The company recorded 159 annualized average cleared DARTs per client account, while the average commission per cleared commissionable order was $2.57.
IBKR’s execution statistics also highlight its competitive positioning. The average U.S. Reg.-NMS stock trade was approximately $23,713 in September, while the total cost of executing and clearing such trades for IBKR PRO clients was about 1.2 basis points of trade value, compared with 2.5 basis points for the rolling 12 months. Competitive execution costs will likely help support client retention and trading activity.
Interactive Brokers’ highly automated operating model enables it to expand across products and geographies without a proportionate increase in operating costs. Its platform provides access to stocks, options, futures, currencies, bonds, funds and digital assets across more than 170 market centers in 40 countries and 29 currencies.
Continued investments in cryptocurrencies, prediction markets, artificial intelligence and international market access are expanding IBKR’s product reach and could further increase client engagement. The scalability of its technology-led model is reflected in compensation expense, which represented just 9.8% of net revenues in the first half of 2026. As client accounts, assets and margin balances expand, IBKR should be able to leverage its existing technology infrastructure to support revenue growth and operating efficiency.
Similarly, Interactive Brokers’ peers, Robinhood Markets (HOOD - Free Report) and The Charles Schwab Corporation (SCHW - Free Report) , are leveraging technology and scalable platforms to drive client and asset growth.
Robinhood is expanding across equities, options, cryptocurrencies, retirement accounts, and prediction markets, while investments in Robinhood Gold, crypto, and prediction markets are expected to boost activity and revenue opportunities. HOOD’s technology infrastructure will likely support growth while maintaining efficiency.
Meanwhile, Schwab spans brokerage, banking, wealth management and advisory services, generating revenues from trading, net interest income and asset management. Digital, wealth, and advisor investments are expected to support client acquisition and asset gathering at SCHW, while scale should improve efficiency.
Our Take on Interactive Brokers
Interactive Brokers’ September metrics data remain encouraging, led by strong growth in client accounts, equity and margin balances. The company’s automated platform and competitive execution costs provide a strong foundation for scalable growth. However, earnings remain sensitive to interest rates, while ongoing investments in technology and expansion could keep expenses elevated. Overall, the latest operating trends support a favorable long-term outlook for IBKR, although its premium valuation and interest-rate sensitivity remain key considerations.
Over the past year, shares of Interactive Brokers have rallied 28.4% compared with the industry’s 8.8% growth.
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Can IBKR's Strong September Metrics Support Further Growth?
Key Takeaways
Interactive Brokers Group, Inc. (IBKR - Free Report) reported solid brokerage metrics for September 2026, with client accounts, equity and margin balances posting strong year-over-year growth. Although Daily Average Revenue Trades (DARTs) declined sequentially, trading activity remained above the prior-year level, highlighting continued client engagement.
IBKR’s Client and Margin Growth Strengthen Revenue Outlook
Interactive Brokers ended September with 5.6 million client accounts, up 35% year over year. Client accounts also increased 2% from August. Ending client equity increased 27% year over year to $964.7 billion. Client credit balances rose 20% year over year to $186.2 billion, including $6.4 billion in insured bank deposit sweeps.
Ending client margin loan balances grew 36% year over year to $105.2 billion. The increase in margin loans was the strongest growth among the major balance-sheet-related brokerage metrics, providing a favorable backdrop for interest income, while rising client assets and accounts create a larger base for future trading activity.
September DARTs rose 6% year over year to 4.1 million despite a 4% decline from August 2026. The company recorded 159 annualized average cleared DARTs per client account, while the average commission per cleared commissionable order was $2.57.
IBKR’s execution statistics also highlight its competitive positioning. The average U.S. Reg.-NMS stock trade was approximately $23,713 in September, while the total cost of executing and clearing such trades for IBKR PRO clients was about 1.2 basis points of trade value, compared with 2.5 basis points for the rolling 12 months. Competitive execution costs will likely help support client retention and trading activity.
IBKR’s Automated Platform Supports Scalable Growth
Interactive Brokers’ highly automated operating model enables it to expand across products and geographies without a proportionate increase in operating costs. Its platform provides access to stocks, options, futures, currencies, bonds, funds and digital assets across more than 170 market centers in 40 countries and 29 currencies.
Continued investments in cryptocurrencies, prediction markets, artificial intelligence and international market access are expanding IBKR’s product reach and could further increase client engagement. The scalability of its technology-led model is reflected in compensation expense, which represented just 9.8% of net revenues in the first half of 2026. As client accounts, assets and margin balances expand, IBKR should be able to leverage its existing technology infrastructure to support revenue growth and operating efficiency.
Similarly, Interactive Brokers’ peers, Robinhood Markets (HOOD - Free Report) and The Charles Schwab Corporation (SCHW - Free Report) , are leveraging technology and scalable platforms to drive client and asset growth.
Robinhood is expanding across equities, options, cryptocurrencies, retirement accounts, and prediction markets, while investments in Robinhood Gold, crypto, and prediction markets are expected to boost activity and revenue opportunities. HOOD’s technology infrastructure will likely support growth while maintaining efficiency.
Meanwhile, Schwab spans brokerage, banking, wealth management and advisory services, generating revenues from trading, net interest income and asset management. Digital, wealth, and advisor investments are expected to support client acquisition and asset gathering at SCHW, while scale should improve efficiency.
Our Take on Interactive Brokers
Interactive Brokers’ September metrics data remain encouraging, led by strong growth in client accounts, equity and margin balances. The company’s automated platform and competitive execution costs provide a strong foundation for scalable growth. However, earnings remain sensitive to interest rates, while ongoing investments in technology and expansion could keep expenses elevated. Overall, the latest operating trends support a favorable long-term outlook for IBKR, although its premium valuation and interest-rate sensitivity remain key considerations.
Over the past year, shares of Interactive Brokers have rallied 28.4% compared with the industry’s 8.8% growth.
One-Year Price Performance
Image Source: Zacks Investment Research
IBKR currently carries a Zacks Rank #2 (Buy). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here..