When Financial Services Go Down: 3 MAJOR DATA CENTER OUTAGES

EXECUTIVE SUMMARY

• Data centers are critical for the operations of financial services, including everyday transactions and high-value day trading activities.
• Three high-profile recent cases highlight the consequences of data center downtime for financial services.
• Data centers supporting financial services can help mitigate the effects of outages by strengthening backup power infrastructure.

WHY DATA CENTERS ARE CRITICAL FOR FINANCIAL SERVICES

From everyday card payments and mobile banking to high-value day trading, modern financial services depend on data centers.

Data centers help process payments, store account information, run banking applications, support insurance platforms and connect traders to global exchanges. Some facilities underpin routine transactions completed in seconds; others support financial operations worth millions of dollars.

How are changing regulations affecting financial services in the UK and EU? Click HERE to read our insights.

WHEN DATA CENTER OUTAGES IMPACT FINANCIAL SERVICES:
3 RECENT CASES

When the infrastructure behind financial services is disrupted, the effects can spread quickly, affecting customers, institutions and the wider market. Three recent incidents illustrate the potential consequences.

1. BARCLAYS: DISRUPTION AT THE WORST POSSIBLE TIME

The case

In early 2025, a technical failure disrupted several Barclays banking services in the UK. Customers reported difficulties accessing digital banking, viewing updated balances and making payments.

The consequences

The timing amplified the impact. The disruption coincided with salary payments for many UK workers and the deadline for self-assessment tax returns. Barclays subsequently estimated that customer compensation associated with the outage was between £5 million and £7.5 million.¹

The incident demonstrates how quickly a technology failure can become a customer, financial and reputational issue. It also shows that the impact of an outage depends not only on its duration, but also on which services are affected and when the disruption occurs.

2. TARGET SERVICES: DISRUPTION AT THE CENTER OF EUROPEAN FINANCE

The case

In February 2025, an infrastructure fault disrupted European Central Bank TARGET Services, which supports the movement of funds, securities and collateral across Europe.

The consequences

The incident interrupted payment processing and securities settlement, delaying transactions.² The scale of this infrastructure makes even a temporary interruption significant. T2 — one of the services affected — processes more than €3 trillion in transactions on an average day. Further interruptions during 2026 renewed concerns about the resilience of this critical financial platform.³

Unlike an outage affecting a single bank’s customer-facing services, disruption to shared financial infrastructure can affect multiple markets and institutions simultaneously. The TARGET incident highlights how deeply interconnected the financial system has become and how failures in one part of the infrastructure chain can have consequences far beyond their point of origin.

3. CME GROUP: A COOLING FAILURE HALTS FUTURES TRADING

The case

In November 2025, CME Group was forced to halt trading across several markets following a cooling-system issue at a Chicago-area data center. The disruption affected futures linked to major financial benchmarks and assets, including US Treasury bonds, the S&P 500, Nasdaq 100, crude oil and gold.

The consequences

The incident was traced to a failure affecting multiple cooling units. While engineering teams worked to restore capacity and deploy temporary cooling equipment, traders were left without current pricing for several important products. One market participant described it as the most widespread outage of its kind he had encountered in 20 years.⁴

REFERENCES
1. Sarah Taaffe-Maguire, “Millions in compensation expected for customers hit by Barclays outages,” Sky News, 6 March 2025, https://news.sky.com/story/millions-in-compensation-expected-for-those-impacted-by-barclays-outages-13322482.
2. European Central Bank, TARGET Services incident of 27th February 2025: Post-mortem Report, November 2025, https://www.ecb.europa.eu/press/intro/publications/pdf/ecb.miptopical251107.en.pdf.
3. Tom Sims, Francesco Canepa and John O’Donnell, “ECB’s multi-trillion payments breakdown sends shudders through Europe,” Reuters, 28 February 2025, https://www.reuters.com/markets/europe/deutsche-boerses-clearstream-deals-withresidual-impact-ecb-outage-2025-02-28/.
4. Georgia Butler, “Cooling issue at data center halts futures trading for CME Group,” Data Center Dynamics, 28 November 2025, https://www.datacenterdynamics.com/en/news/cooling-issue-at-data-center-halts-futures-trading-for-cme-group/.

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