U.S. High-Grade Market Share Rebounds to 17.8%
Select May highlights: Trading volumes across most products, as well as U.S. high-grade estimated market share, rebounded in May from April levels. U.S. high-grade estimated market share increased approximately 100 basis points to 17.8%, driven by improved estimated market share in the client-initiated channel on our platform. The company estimates that duplicate trade reports inflated U.S. high-grade TRACE volumes by up to 8% in May 2026. Adjusting for these duplicates, consistent with FINRA's recent proposal to suppress duplicate reporting, we believe our estimated U.S. high-grade market share would have been approximately 160 basis points higher, or approximately 19.5%, in May 2026. With the improvement in estimated market share in the client-initiated channel in U.S. high-grade compared to April, we also continued to make progress with block trading, portfolio trading and dealer-initiated protocols across the platform. Growth in these protocols was a key driver of the month-over-month decline in total credit FPM.
