Trading Suspended at CME Group Today due to Cooling Issue

On November 28, 2025, global financial markets experienced an unusual disruption when CME Group, the worlds largest futures and derivatives exchange, suddenly came to a standstill. Trading of futures and options on the Chicago Mercantile Exchange (CME) was halted for several hours, affecting stocks, currencies, bonds, and commodities. The pause occurred due to a cooling system issue at a CyrusOne data center in Chicago.

CME Group posted on X (Twitter)

“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.”

A CyrusOne spokesperson added:

“Our engineering teams, along with specialized mechanical contractors, are on-site working to restore full cooling capacity. We have successfully restarted several chillers at limited capacity and deployed temporary cooling equipment to supplement our permanent systems.”

CME Group Provides Update on Market Halt

After This Disruption , CME Group informs its clients and wrote on X

“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.”

Investor‘s Reactions on this disruption

We reviewed comments on CME Group’s official X (Twitter) post, and investors are reacting in various ways.

• Romik Rai wrote: “So they all got cooling issues together at the same time? Please share some proof. Else its just banks (market makers) faking a force majeure event on settlement; to loot their clients as always.”

• Many users are demanding compensation for investors, while others are calling the company liars or accusing CME Group of market manipulation.

• KP asked: “Who will bear my losses?”

• BB Brownie wrote: “You‘re lying. Silver got dangerously close to breaking you and your short bank buddies. It’s game over.”

• Henry commented: “Or just tell us if youre going to take the whole day, or the entire weekend.”

• Andre wrote patiently: “Just keep them halted until Sunday open. Figure things out carefully so this doesnt happen again, please.”

What is CME ?

The Chicago Mercantile Exchange (CME) is one of the worlds largest and most important financial exchanges, where traders buy and sell futures and options contracts on a wide range of assets. These include stocks, currencies, interest rates, commodities like oil, gold, and agricultural products, as well as cryptocurrencies. CME provides a regulated platform for investors and institutions to hedge risks, speculate on price movements, and manage financial exposure. It is known for its advanced electronic trading system, which allows markets to operate globally almost 24/7, making it a key hub in the world of finance and derivatives trading.

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