U.S. options trading growth raises systemic risk concerns due to reliance on a few banks for trade guarantees.

The U.S. options market, on track for a record sixth year of high trading volume, is raising concerns over concentration risk in its clearing system. The Options Clearing Corp. relies heavily on a small group of banks—like Bank of America, Goldman Sachs, and ABN AMRO—to guarantee trades and fund default protections, with the top five members contributing nearly half of the default fund in Q2 2025. Industry leaders warn that a failure at one of these major institutions could trigger widespread losses, despite low odds. Growing trading volumes, including a 52% rise in October 2025, are straining the system, while regulatory fragmentation and limited cross-margining access add complexity. Some market makers are shifting to self-clearing, but this increases risk due to lower capital. The OCC is exploring changes to its default fund model to better withstand extreme market events, aiming to strengthen stability amid rising volume and complexity.