Interactive Brokers Reports Y/Y Increase in May Client DARTs

Interactive Brokers (IBKR) reported a 43% year-over-year increase in May client DARTs to 3.38 million, although this represents an 11% decrease from April 2025. Customer accounts grew 32% year-over-year to 3.79 million, while client equity reached $628.2 billion, up 29% from the prior year; margin loans and credit balances also saw gains, rising 15% and 26% year-over-year, respectively. IBKR shares have outperformed the industry over the past six months, rising 12%.

Analysis

Interactive Brokers (IBKR) reported robust year-over-year growth in its May 2025 performance metrics for its Electronic Brokerage segment, indicating continued business expansion. Total client Daily Average Revenue Trades (DARTs) surged 43% year-over-year to 3.384 million, and customer accounts increased by 32% to 3.79 million, with net new accounts up 31% YoY to 74,800. Financially, client equity grew 29% YoY to $628.2 billion, client credit balances rose 26% YoY to $134.7 billion, and customer margin loan balances increased 15% YoY to $61.2 billion. Trading volumes also showed strength, with total options contracts up 23% YoY to 128.3 million and futures contracts increasing 12% YoY to 19.8 million. However, these strong annual gains were tempered by sequential declines from April 2025: total DARTs fell 11%, cleared average DARTs per account dropped 14%, net new accounts decreased 21%, options contracts were down 7%, and futures contracts saw a significant 26% decline. Despite these monthly fluctuations, IBKR's shares have risen 12% in the past six months, outperforming the industry's 3.5% growth and Charles Schwab's (SCHW) 8.1% rise, though trailing LPL Financial's (LPLA) 17.3% rally. The company currently holds a Zacks Rank #3 (Hold).

Key Decisions for Investors

• Investors should acknowledge Interactive Brokers' significant year-over-year growth in key operational and financial metrics, which signals strong underlying business momentum and client acquisition.
• The reported month-over-month declines in DARTs, net new accounts, and trading volumes across options and futures warrant close attention in subsequent reports to determine if this represents a normalization of activity or an emerging trend of slowing growth.
• Given the stock's outperformance and the current Zacks Rank #3 (Hold), investors might maintain existing positions, but should carefully weigh the robust annual growth against the recent sequential deceleration and await further data before significantly increasing exposure.