The London Stock Exchange's multilateral trading facility, Turquoise, was disrupted for over two hours after human error in potentially suspicious circumstances occurred.
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The migration of the London Stock Exchange to MillenniumIT, planned for next month, will now be put back. An investigation is being carried out into the incident.
The Turquoise trading platform, which was recently hailed the fastest in the world, experienced disruption between 08.23am and 10.30am this morning (02 November).
Turquoise has already migrated to the London Stock Exchange Group's new MillenniumIT trading platform.
Today's problems have led the company to postpone next month's migration of the main London Stock Exchange to the trading system.
"Investigations into this morning's trading disruption on London Stock Exchange's pan-European MTF, Turquoise, have revealed that human error was to blame for the disruption that began at 08.23am this morning. The issue was swiftly isolated, and normal trading resumed at 10.30am," said the London Stock Exchange. "Preliminary investigations indicate that this human error may have occurred in suspicious circumstances."
The company has launched a full investigation and has informed the relevant authorities..
"In light of this incident, coupled with necessary network upgrades to address ultra low latency and high flow inherent in the new platform, the Group has regrettably been forced to postpone its Main Market LSE technology migration for SETS." The company now plans to move its primary trading platform to MillenniumIT as early as possible next year.