CME Group Suspends Trading for 10 Hours Following Data Center Cooling Failure
Chicago Mercantile Exchange suspended trading for approximately 10 hours on November 28, 2025, after a cooling system malfunction at a CyrusOne data center in Aurora, Illinois. The outage affected futures markets across equities, rates, commodities, and cryptocurrencies. Full functionality was restored at 1:30 p.m. UTC, though delays persisted in some products.