Interactive Brokers' Margin Loans Grew 49% in a Year to $100.7 Billion

Interactive Brokers reported a 49% year-over-year surge in customer margin loans to $100.7 billion in July, with customer count growing 34% to 5.3 million. This growth is expected to significantly boost the company's net interest income in Q3, though future performance depends on interest rate trends and continued customer acquisition. The stock trades at a P/E ratio of 36, reflecting investor confidence in sustained growth.