CME Group Halts Trading, Cites Cooling System Failure at Data Centres

CME Group has halted trading across its Globex platform, affecting a wide range of contracts tied to stocks and crypto. The temporary suspension is due to “a cooling issue at CyrusOne data centres,” a statement on its website read.

“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 team wrote.

JUST IN: 🇺🇸 CME Globex Futures and Options markets halted due to technical issues. pic.twitter.com/u478A23oCD

— Whale Insider (@WhaleInsider) November 28, 2025

CyrusOne operates over 55 data centres across the US, Europe and Japan, Reuters noted. The outage has impacted all futures and options contracts on its Globex platform.

Traders React to CME Outage, Says It’s a “Nightmare”

One trader, who declined to identify, told Reuters that the halt is a “nightmare.”

The CME Group informed traders just before the outage, affecting all futures and options contracts, including major currency pairs.

One user posted on X, asking the firm to cancel losses for any stuck trades.

Further, traders reported that crude oil and palm oil contracts stopped moving during the interruption. Meanwhile, crypto traders took the brunt too as Bitcoin and Ethereum futures on CME went offline during the halt.

The trading halt interrupted active sessions in Asia, especially when liquidity was already thin due to the U.S. Thanksgiving holiday.

“It’s been a very slow day here in Asia after the Thanksgiving holiday and this hasn’t helped at all, more so given there is interest to transact at the end of what has been a volatile month,” market analyst Tony Sycamore told Reuters.

Bitcoin Slumps Below $91K, Contrasts With 8.32% Weekly Gain

Meanwhile, Bitcoin fell 0.55% to $90,896 over 24h, contrasting with an 8.32% weekly gain. The slight decrease is attributed to $13.4 billion BTC options expiry squeeze.

Approximately 147,000 BTC options expired on November 28, favoring bearish bets.

Besides, BTC tested $91,800 resistance three times in 24h but failed to hold, triggering automated sell orders. The largest crypto is currently trading at $91,24, at press time, per CoinMarketCap data.