Shares of the online brokerage rose on a solid first-quarter earnings report. Shares of Interactive Brokers (IBKR 1.74%) were climbing today after the discount brokerage platform posted better-than-expected results in its first-quarter earnings report. The company also gave investors a generous dividend hike. As of 1:23 p.m. ET, the stock was up 3.3%. Interactive Brokers delivers solid growth In a competitive environment in the brokerage industry, Interactive Brokers reported solid growth across the board w ...