Stock Exchange Clarifies Post-Only Order Rules

2026-06475 — Self-Regulatory Organizations; Cboe Exchange, Inc.; Notice of Filing of Amendment No. 1 and Order Granting Accelerated Approval of a Proposed Rule Change, as Modified by Amendment No. 1, To Amend Cboe Rule 5.4

Cboe Exchange is changing the smallest price step for options on its Mini Bitcoin ETF Index to make trading smoother and clearer. This change affects traders using these options and kicks in quickly after approval, with no extra costs involved. The SEC gave this update a fast green light, so expect the new rules to start soon!

2026-06469 — Self-Regulatory Organizations; BOX Exchange LLC; Notice of Filing of Proposed Rule Change To Amend BOX Rules 5055 (FLEX Equity Options) and 3120 (Position Limits)

BOX Exchange wants to update its rules for special options tied to popular Bitcoin and Ethereum ETFs and trusts. These changes affect traders using FLEX equity options and position limits, aiming to keep things fair and clear. The new rules could impact how much traders can hold and trade, with the proposal open for public comments starting April 2026.

2026-06473 — Self-Regulatory Organizations; Nasdaq PHLX LLC; Notice of Filing and Immediate Effectiveness of a Proposal To Amend the Exchange's Anti-Internalization Functionality in Equity 4, Rule 3307, and To Extend the Implementation Date of the CORE FIX Order Entry Protocol

Nasdaq PHLX is updating a rule that helps stop trades from accidentally happening within the same firm, which keeps trading costs down. They’re also pushing back the start date for a new order entry system called CORE FIX. These changes affect traders using Nasdaq PHLX and aim to make trading smoother without extra costs, with the new system launch delayed to give everyone more time to get ready.

2026-06462 — Self-Regulatory Organizations; 24X National Exchange LLC; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Adopt a Monthly Enterprise Fee for Its Depth of Book Proprietary Market Data Feed

24X National Exchange is starting a new monthly fee for companies using its special market data feed that shows detailed order info. This change affects businesses that rely on this data and kicks in right away, meaning they’ll pay a set monthly charge to access it. It’s a clear move to keep the data service running smoothly and fairly.

2026-06466 — Self-Regulatory Organizations; The Nasdaq Stock Market LLC; Notice of Filing and Immediate Effectiveness of a Proposal To Amend the Exchange's Anti-Internalization Functionality in Equity 4, Rule 4757, and To Extend the Implementation Date of the CORE FIX Order Entry Protocol

Nasdaq is updating a rule that helps stop trades from accidentally happening within the same firm, which keeps trading fair and lowers costs. They’re also pushing back the start date for a new order entry system called CORE FIX to give everyone more time to get ready. These changes affect traders using Nasdaq and aim to make trading smoother without extra fees or delays.

2026-06463 — Joint Industry Plan; Notice of Filing of Amendment No. 1, and Order Instituting Proceedings To Determine Whether To Approve or Disapprove an Amendment to the National Market System Plan Regarding Consolidated Equity Market Data, as Modified by Amendment No. 1, To Adopt a Fee Schedule

Big stock market players like exchanges and trading groups want to start charging fees for sharing important stock data. They updated their plan after hearing feedback, and now the SEC is deciding if these new fees are fair and should go live. If approved, this could change how much it costs to get stock info starting soon.

Previous: 2026-05944 — Self-Regulatory Organizations; Investors Exchange LLC; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend IEX Rules To Reflect the Name Change of Nasdaq BX to Nasdaq Texas

IEX is updating its rules to swap out the old name Nasdaq BX for the new name Nasdaq Texas. This change keeps everything clear and current for traders and investors using IEX. The update is effective immediately and won’t cost anyone extra—it’s just a name switch to keep things tidy.

Next: 2026-05946 — Self-Regulatory Organizations; NYSEArca, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Adopt a New Methodology for Assessment and Collection of the Options Regulatory Fee (ORF)

NYSE Arca is changing how it charges the Options Regulatory Fee (ORF). Starting after June 30, 2026, they’ll only charge fees on options trades done on their exchange and cleared in the Customer range at the Options Clearing Corporation. This update matches what other options exchanges are doing and could affect traders’ costs.