Interactive Brokers' lean, high-margin brokerage is generating rising net interest income. It is the 'big boy' broker, not Robinhood: its clients have real money on the line. In Q3 FY26, net revenue rose 16% to $1.914 billion and net interest income 19% to $1.154 billion year over year; basic EPS rose 17% to $0.69. Net income to common was $314 million of $1.348 billion total, with most going to noncontrolling partnership interests by design. Grade: A. x.comÂ