The brokerage platform is growing like a weed.Financial technology investors are all over hot names like Robinhood Markets and Coinbase Global, which dominate media conversations. But there is one financial player in the brokerage space flying under the radar, and it may present an opportunity for huge long-term returns: Interactive Brokers (IBKR 2.22%). This institutional brokerage platform that has turned into a global retail powerhouse is convincing investors to switch to its platform in droves, leading ...