Trading grinds to a halt across many CME markets after a 'cooling issue' at a data centerNEWS | 28 November 2025This story is available exclusively to Business Insider subscribers. Become an Insider and start reading now.
Trading across the majority of the Chicago Mercantile Exchange's markets ground to a halt on Friday after a cooling problem at one of its data centers.
"Due to a cooling issue at CyrusOne data centers, our markets are currently halted," CME Group posted on X, adding that it was "working to resolve" the problem.
Due to a cooling issue at CyrusOne data centers, our markets are currently halted. Support is working to resolve the issue in the near term and will advise clients of Pre-Open details as soon as they are available. — CME Group (@CMEGroup) November 28, 2025
The CME is the world's largest exchange operator by market value, powering the trade of stocks, commodities, currencies, and other assets. The group posted later Friday that "BrokerTec EU markets are open and trading," but all of its other markets "remain halted."
BrokerTec EU markets are open and trading. All other CME Group markets remain halted due to a data center cooling issue at CyrusOne. We will provide updates as they are available. — CME Group (@CMEGroup) November 28, 2025
The halt could result in greater volatility during the shortened trading session later on Friday, as even thinner holiday trading than usual could lead to steeper price swings.
This is a developing story.Author: Theron Mohamed. Source
