MIAX Exchange Group reports 25.5% increase in multi-list options ADV YTD. Miami International Holdings, Inc. (MIAX) reported August 2026 trading results for its U.S. exchange subsidiaries — MIAX, MIAX Pearl, MIAX Emerald, and MIAX Sapphire, reaching a record YTD average daily volume of 11.0 million contracts, a 25.5% increase from the same period in 2025. Market share also set a YTD record of 17.1% through August 2026. Additional trading volume and market share information is available on the MIAX website.