Trading restarts at the CME after a 'cooling issue' at a data center prompted a halt

Core Points - Trading across the majority of the Chicago Mercantile Exchange (CME) markets was halted due to a cooling issue at a partner's data center [1][3] - The issue was resolved by around 8:20 a.m. ET, with trading resuming at 7:30 a.m. local time for futures and options [2][3] - The halt had the potential to cause substantial issues across global financial markets, given CME's status as the world's largest exchange operator by market value [2] Summary by Sections Trading Halt - A cooling problem at CyrusOne data centers led to a halt in trading across many CME markets [1][3] - The halt occurred on a Friday, which is typically a thinner trading day due to the holiday season [3] Resolution and Impact - By 8:20 a.m. ET, CME announced that markets were open and trading had resumed [2] - The resumption of trading could lead to greater volatility during the shortened session due to thinner holiday trading conditions [3]