Finance

LME electronic trading hit by technical halt

Published by Global Banking & Finance Review

Posted on March 16, 2026

2 min read

· Last updated: April 1, 2026

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LME electronic trading hit by technical halt
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March 16 (Reuters) - The London Metal Exchange said on Monday its electronic market LME Select had been hit by a technical halt and that trading was unavailable as it worked to resolve the problem.

LME electronic trading resumes after nearly 3-hour outage

London Metal Exchange Trading Outage and Recovery

Timeline of the Outage

March 16 (Reuters) - Electronic trading on the London Metal Exchange's LME Select platform resumed at 1730 GMT on Monday after an outage of nearly three hours caused by a technical issue.

Impact on Metal Contract Prices

Prices for the LME's metal contracts, including copper, aluminium, lead, zinc, nickel and tin stopped updating on LSEG's Workspace platform shortly before 1500 GMT.

Cause of the Outage

The LME, the world's oldest and largest market for industrial metals, said its primary electronic matching engine encountered an issue, causing electronic trading to enter a technical halt. The inter-office market remained open throughout, it said.

Official Statement and Disruption Event

"Although all closing prices were produced per the LME's usual process, a Disruption Event was declared, because the system issue affected the ability of market participants to hedge at the relevant prices," the LME said in a statement.

Backup Procedures

The exchange had earlier said it expected to have to resort to a backup approach to produce closing prices.

Previous Technical Issues

On January 30, the LME delayed the start of electronic trading by one hour due to a technical issue.

Resumption of Trading

The electronic market was restarted on the secondary matching engine at 1730 GMT on Monday and trading is scheduled to continue as normal until 1900 GMT, the LME said.

(Reporting by Tom Daly; Editing by Hugh Lawson and Tomasz Janowski)

Key Takeaways

  • LME Select platform suffered a technical outage, suspending electronic updates for copper, aluminium, lead, zinc, nickel and tin prices around 15:00 GMT on March 16 2026 (investing.com).
  • Inter-office (phone-based) trading remained operational while LME worked to restore the electronic market and prepare fallback pricing via its backup waterfall approach for the 16:00–17:00 GMT closing window (prismnews.com).
  • This incident is part of a pattern of LME platform disruptions in 2026—including a prior one-hour delay and a five-hour outage—underscoring structural vulnerabilities in its electronic infrastructure (investing.com)

References

Frequently Asked Questions

What caused the trading halt on the London Metal Exchange?
The LME’s electronic trading platform, LME Select, was hit by a technical issue, resulting in a temporary trading halt.
Which metal contracts were affected by the LME outage?
Prices for contracts including copper, aluminium, lead, zinc, nickel and tin were impacted.
How did the LME plan to manage closing prices during the outage?
The LME used a backup pricing waterfall approach to determine closing prices, leading to a pricing disruption event.
Was any form of trading still available during the LME electronic halt?
Yes, inter-office trading continued as normal despite the outage on the electronic platform.
When did LME Select experience the technical halt?
The halt occurred around 1500 GMT on March 16, with prices stopping updates on LSEG’s Workspace.

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