Interactive Brokers Grew Its Customer Accounts 34% in a Year. Here's the Bull Case Before Q2 Earnings.

Interactive Brokers reported strong June 2026 metrics with 34% year-over-year growth in customer accounts to 5.185 million, 40% increase in client equity to $930.3 billion, and 53% surge in trading volume. The company also saw margin loan balances jump 67% to $108.5 billion. Q1 2026 revenues grew 17% to $1.67 billion with adjusted earnings up 28% to $0.60 per share. However, the stock trades at valuations roughly twice its five-year averages, suggesting high market expectations that could lead to disappointment if Q2 results don't exceed forecasts.