Traders work on the floor at the New York Stock Exchange (NYSE) in New York City, U.S., Nov. 26, 2025.
Brendan McDermid | Reuters
Stock futures trading was halted Friday following a “cooling issue” at a data center that caused a disruption in assets traded at the Chicago Mercantile Exchange.
CNBC data shows that Dow Jones Industrial Average futures were up 52 points, or 0.1%, when trading stopped. S&P 500 futures and Nasdaq-100 futures traded 0.1% higher and 0.2%, respectively.
“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. Treasury trading later resumed after the CME’s BrokerTec EU and U.S. markets were open. Metals also later began trading again. Futures will resume trading at 8:30 a.m. ET, per CME.
The disruption could cause even more volatility, as Wall Street comes back from the Thanksgiving holiday for a shortened trading session on Friday. Trading volumes the day after Thanksgiving are historically well below average, meaning moves — to the upside and the downside — could be more extreme.
A losing November
Friday also marks the last trading day of November. A pullback in tech stocks have weighed on the major averages this month, as doubt swirled around the future profitability of AI companies.
Yet some investors are hopeful that this month’s slide will mean a year-end rally is in store for the major averages, as they step into buy stocks that have been unduly punished at more attractive valuations.
As of Wednesday’s close, the Dow and the S&P 500 were slightly lower on the month, each set to snap six straight months of gains. The Nasdaq fell 2%, on track to end a seven month advance.
Stocks are on pace to wrap up a winning week, following a turnaround in tech names. The Dow is up more than 2% week to date, while the S&P 500 and Nasdaq Composite are higher by 3% and 4%, respectively, in the weekly period.
Wall Street headed for big weekly gains, but a losing month
The major averages were headed for strong weekly gains. However, their November performances are another story.
Here’s where the benchmark stand for the week, through Wednesday’s close:
- S&P 500 up 3.2%
- Dow Industrials: up 2.6%
- Nasdaq Composite: up 4.2%
Here’s a look at their month-to-date losses:
- S&P 500: down 0.4%
- Dow Industrials: down 0.3%
- Nasdaq Composite: down 2.2%
— Fred Imbert
CME halts futures trading after ‘cooling issue’ at data center
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 organization said it may take some time for moves in the impacted contracts to be seen once the outage is resolved.
Globex futures and options markets, foreign exchange platform EBS markets and BMD markets were all impacted, the CME added.
— Chloe Taylor