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Data Center Outage Halts Global Trading, CME Shares Drop

12/10/2025

38 3 Full Breakdown

Summary

Story summary

A CyrusOne data center outage began on November 27 due to human error during a cooling system adjustment, disrupting trading across global markets, including Tokyo and London.
The Chicago Mercantile Exchange did not switch to a backup facility, believing the outage would be brief.
The outage caused a trading halt and affected trillions of dollars in transactions.
Trading resumed on November 28.
CME shares fell 3.7% since November 26.

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Story summary

A CyrusOne data center outage began on November 27 due to human error during a cooling system adjustment, disrupting trading across global markets, including Tokyo and London.
The Chicago Mercantile Exchange did not switch to a backup facility, believing the outage would be brief.
The outage caused a trading halt and affected trillions of dollars in transactions.
Trading resumed on November 28.
CME shares fell 3.7% since November 26.