Cboe EDGX Revises Rules for Smoother Trading Halts
Published Date: 3/18/2026
Notice
Summary
Cboe EDGX Exchange is updating its rules to better handle trading pauses and align with new market data standards. These changes affect traders and market participants by making trading halts clearer and rules easier to follow, with no expected costs or delays. The updates took effect right after filing on March 6, 2026, keeping the market smooth and transparent.
Analyzed Economic Effects
4 provisions identified: 4 benefits, 0 costs, 0 mixed.
Primary Listing Market Controls Halts
The Exchange will now honor Regulatory Halts declared by the Primary Listing Market for a security. The official start time of a Regulatory Halt is the time the Primary Listing Market declares it, regardless of when notice is disseminated, and these rule changes took effect on March 6, 2026.
New SIP Halt and Resume Rules
The Exchange adopts the category of a 'SIP Halt' for Regulatory Halts caused by a SIP outage or material SIP latency and uses a SIP Halt Resume Time in restart procedures. During Regular Trading Hours the Exchange may resume trading after the Primary Listing Market resumes or notifies that trading may resume; outside Regular Trading Hours the Exchange may resume trading immediately after the SIP Halt Resume Time.
Operational Halts Apply Only to EDGX
The Exchange formally adds 'Operational Halts' that apply only to trading on EDGX and are discretionary. While a security is under an Operational Halt the Exchange will not accept orders for queuing before resumption and any open orders on the EDGA Book will be cancelled; the Exchange will resume trading when it determines trading may resume in a fair and orderly manner.
Limit Up-Limit Down Clarified for EDGX
The Exchange reorganized the Limit Up-Limit Down (LULD) text into Rule 11.16 and clarifies that, as a non-Primary Listing Market, EDGX does not declare LULD pauses itself but implements pauses declared by Primary Listing Markets. This reorganization and clarification became effective upon filing on March 6, 2026.
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