Stock Exchange Clarifies Post-Only Order Rules
Published Date: 3/27/2026
Notice
Summary
24X National Exchange is updating its rules to make it clearer how certain special orders are handled and to fix some references to current trading regulations. This change affects traders using Post Only orders and helps the Exchange follow the latest rules without causing delays or extra costs. The update took effect right away on March 16, 2026, so everyone trading on 24X should be aware of the new clarifications now.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Clarified Post Only Order Handling
If you trade on 24X and use a Post Only instruction, the Exchange clarified that such orders may remove liquidity when the order is to buy or sell a security priced below $1.00 or when removing liquidity is economically beneficial to the firm. The rule makes this handling apply regardless of whether the order also includes a Display-Price Sliding instruction, a Cancel Back instruction, or no additional instruction, and the change became effective March 16, 2026.
Updated Regulation NMS Cross-References
24X updated references in Rule 11.6 to reflect that former Rule 610(d) of Regulation NMS was renumbered as Rule 610(e). The Exchange amended rule text in 11.6(a), (b), (e), and (j) to refer to Rule 610(e); the Regulation NMS amendments became effective February 2, 2026 and 24X made its changes effective March 16, 2026.
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