IEX Patches Rule Glitches Before Options Debut
Published Date: 9/21/2026
Notice
Summary
IEX is fixing confusing parts of its Rule 22.260 to get ready for launching IEX Options. This change helps traders by making the rules clearer and easier to follow, with no extra costs or delays. The update is effective immediately, so everyone can trade smoothly when IEX Options go live.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
Market Orders Will Be Canceled, Not Converted
IEX deleted Rule 22.260(b) so a sell or buy Market order with a Time-in-Force of IOC will be canceled (not converted into a Limit order) when there is no contra-side interest. This change is effective upon filing (filed September 8, 2026) and is intended to be operative by October 2, 2026 when IEX Options begins trading.
Drill-Through Protection Excludes Post Only Orders
IEX amended Rule 22.260(e) so Drill-Through Protection will not apply to Post Only orders (in addition to bulk messages and ISOs). This means Post Only interest, which by rule cannot remove liquidity, will not be subject to the drill-through iterations that limit how far aggressive orders can execute.
Rule Changes Effective Immediately for IEX Options Launch
The Exchange filed the amendments on September 8, 2026 and requested, and the Commission designated, that the proposed rule change be operative upon filing so the rules will be in effect for the October 2, 2026 IEX Options launch. The immediate effectiveness is intended to prevent confusion when trading begins.
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