Interactive Brokers Group posted stronger-than-expected second-quarter results, buoyed by robust customer trading activity and higher interest income. Revenue rose 15% from a year earlier to $1.48 billion, outpacing the $1.36 billion analysts projected, while adjusted earnings came in at $0.51 a share versus the $0.46 consensus. Net income climbed to $1.01 billion, and the electronic brokerage declared an $0.08 quarterly dividend. The stock gained more than 5% in after-hours and pre-market trading following the release. Commission revenue increased 27% to $516 million as client volumes in stocks and options remained elevated. Net interest income, a growing contributor thanks to higher rates, reached $860 million, topping forecasts of $794.7 million. Average customer margin loans were broadly steady at $60.93 billion, while total customer accounts expanded 32% year-on-year to 3.87 million, underscoring continued user growth on the platform. Management highlighted the combination of active retail and institutional trading and a favorable rate environment as key drivers of performance. With account growth still outpacing industry averages and interest revenue continuing to rise, Interactive Brokers enters the second half of the year positioned to capitalize on both market volatility and elevated cash yields.