Interactive Brokers' stock has soared, fueled by surging account growth and strong momentum across its entire business.Interactive Brokers (IBKR 1.24%) has quietly outpaced one of the market's most talked-about winners in 2025. As of this writing, Interactive Brokers' stock has risen about 50% in 2025, beating AI (artificial intelligence) chipmaker Nvidia's (NVDA 1.72%) 42% gain.That comparison is useful because it highlights something investors can miss when attention is concentrated in one corner of the m ...