Interactive Brokers Group, Inc. IBKR shares are trading lower in Tuesday's after-hours session following the release of the company's fourth-quarter earnings results. Here's an overview of how the company performed. What To Know: Interactive Brokers Group reported quarterly earnings of $1.52 per share, falling short of the analyst consensus estimate of $1.55. Revenue of $1.15 billion topped the Street's expectations of $1.14 billion, a 17.73% increase over revenue of $976.00 million from the same period last year. The company also reported that customer accounts grew 23% to 2.56 million during the quarter. Additionally, commission revenue rose 5% to $348 million with customer trading volume mixed across product types. Options and futures contract volumes were up 21% and 4%, respectively, while stock share volume was down 22%.