Interactive Brokers enters its third-quarter report with a gap between how the business is running and how the stock is trading. Last quarter, nearly every operating gauge accelerated at once: commissions, net interest income, client equity, trading volume and account growth. Since then the shares have slipped 3.2% while the S&P 500 gained 4.4%, and sentiment has turned from clearly bullish to modestly bearish. The October 15 report, due after the close, will show whether that caution is a sensible pause or a misread of a company still gaining speed.
The Street is looking for earnings of $0.66 per share, up about 16% from $0.57 a year ago but below the $0.69 delivered last quarter. The whisper number sits at $0.69, which suggests the informal bar is simply a repeat of the second quarter rather than a step back. That spread is small, but it matters: a print that only meets consensus would mean a sequential decline that is hard to square with last quarter's momentum. Consensus revenue of $1.85 billion implies a drop of roughly a third from a year ago, but that figure looks inconsistent with both the $3.08 billion reported last quarter and the company's operating trends. Earnings per share are the cleaner signal here. Interactive Brokers does not give numeric guidance, so the second-quarter call is the best guide to what management expects.
The main question is whether commission growth can stay near the 30% pace reached in the second quarter, up from 19% in the first. Daily average revenue trades rose 36% to 4.8 million, and overnight trading nearly tripled. Steady activity, even with commission per order holding near $2.64, would show the jump was not a one-quarter burst. Chairman Thomas Peterffy said he sees no reason for account growth above 30% to slow. New accounts grew 34% last quarter, so a figure at or above 30% would support his view. A clear slowdown would raise doubts about it.
Net interest income is the second test. It topped $1 billion last quarter, up 23%, as margin-loan interest climbed 39% despite lower policy rates. Larger balances cut both ways, though. Each 25 basis point move in rates now affects about $81 million of annual interest income, and margin loans are at record highs. Continued growth in client cash, which reached a record $182 billion, and in securities lending revenue would show balance-sheet growth outrunning rate pressure. Any jump in credit costs tied to margin lending would get close scrutiny. The company has kept pretax margins above 70% for seven straight quarters, and an eighth would confirm that its cost discipline holds.
The pipeline of new products is unusually crowded, and this report is the first real check on several of them. These include first-mover access to Korean stocks, the IBKR Connector integration with AI chatbots, a unified prediction markets hub adding CME and Kalshi, and crypto trading across Europe. Early adoption figures, plus progress on the trust bank charter targeted to be running by year-end, would show these are adding revenue rather than just headlines. Transfers in from Tiger and Futu after China's regulatory clampdown are another flow worth tracking.
Technically, the stock sits at $90.58, comfortably above its 200-day average of $81.46. It trades in the middle of its post-earnings range of $83.60 to $98.75, not near a breakout. That leaves room to move either way. In the end, the story holds up if trading activity and account growth stay above 30% while interest income keeps rising despite rate headwinds. Do that, and the market's recent doubts look misplaced. Show signs that the second quarter was a peak, and the cautious mood will seem justified.