- The CME Group EBS market suspension ended; trading resumes at 12:00 GMT.
- Trading halt caused by cooling failure at CyrusOne Chicago data center.
- Market disruption affected futures/options, highlighting infrastructure vulnerabilities.
The CME Group’s EBS platform will reopen on November 28, 2025, at 12:00 GMT, after a severe cooling failure at the CyrusOne CHI1 data center caused trading disruptions.
This outage underscores vulnerabilities in financial infrastructures, affecting futures and forex markets globally, with potential repercussions on market liquidity and volatility levels due to halted trading operations.
Data Center Cooling Malfunction Halts CME Trading
A cooling failure at the CyrusOne CHI1 data center led to a significant trading suspension on November 28, lasting several hours. The outage halted trading across the CME Group’s major platforms, including futures and options markets alongside the EBS foreign exchange network.
The suspension caused challenges for various market participants due to paused liquidity and volatility. Trading resumed once cooling systems were restored, but the event highlighted the critical role of data center reliability in financial markets. The halt coincided with a critical S&P 500 expiration, posing potential hedging difficulties. “The halt in trading comes at a critical time with substantial options on key indices expiring today,” noted a financial expert from Moneycontrol.
The market response was significant, with WTI crude futures rising 0.7% and Brent crude by 0.4% during the outage, reflecting prices reacting strongly to the suspension. Though no executives gave statements, CME Group confirmed its commitment to resolving technical disruptions swiftly.
CME Group’s EBS Market Resumption Raises Resilience Concerns
Did you know? The CME Group’s outage in 2025 marks a longer disruption than their 2019 event, emphasizing the size and scale of data center dependencies in global markets.
Ethereum (ETH) holds a market cap of $366.88 billion and a current price of $3,039.71, according to CoinMarketCap data, as of November 28, 2025. ETH’s 24-hour trading volume fell by 21.26%, with a 0.63% price gain in the same period. Over 90 days, ETH has seen a -30.67% shift.
Ethereum(ETH), daily chart, screenshot on CoinMarketCap at 12:21 UTC on November 28, 2025. Source: CoinMarketCapInsights from the Coincu research team suggest that while the CME Group controls platforms like EBS, the broader reliance on digital infrastructures means further financial and regulatory evaluations could follow such incidents to engage technological resilience strategies with a focus on data integrity and operational oversight.
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Source: https://coincu.com/analysis/cme-ebs-market-reopens/
