Trading came to a standstill on the Chicago Mercantile Exchange on Friday following a cooling issue at one of its data centers.

"Due to a cooling issue at CyrusOne data centers, our markets are currently halted," a spokesperson for the CME said in an emailed statement in the early hours of Friday. "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."

The CME trades futures and options across various asset classes, including agricultural commodities, energy, metals and equities.

A spokesperson for Dallas, Texas-headquartered CyrusOne was not immediately available for comment.

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