The London Stock Exchange RFQ functionality will be re-enabled on Monday 12 February 2024.

Let’s recall that LSE confirmed an incident occurred on October 19, 2023. At 15:11 BST on Thursday 19 October, all instruments on Partition 3 (of 3) of the LSE Order Book entered into a Halt state. This affected all instruments except for constituents of the FTSE 100 and FTSE 250 indices and International Order Book securities.

It was identified that the Halts were caused by a matching engine logic issue on Partition 3 as the mirror process did not take over as would be expected in case of a hardware issue. Further investigations identified that the root cause of the issue related to the Request For Quote (RFQ) functionality for Exchange Traded Products (ETPs).

All LSE Order Book securities opened as normal on Friday 20 October. However, as a precaution whilst LSE’s detailed investigation continued into the root cause and remediation, RFQ functionality was temporarily disabled in respect of all ETP securities.