Volume surpasses 450,000 contracts since launch OI hits new high of 6,800 contracts representing over $700 million notional value CHICAGO , Sept. 8, 2025 /PRNewswire/ -- CME Group, the world's leading derivatives marketplace, today announced that trading volume in its investment grade and high yield credit futures surpassed 450,000 contracts, as open interest (OI) reached 6,800 contracts on September 4. ...