Cboe Exchange Dumps Fees for Dusty Old Trading Platform
Published Date: 9/23/2025
Notice
Summary
Cboe Exchange is dropping all fees tied to its old Silexx trading platform and ending previous fee waivers for FLEX and Silexx FIX connections. This means users will now pay standard fees as the platform migration wraps up. If you’re trading on Cboe, expect these changes to take effect immediately, so plan your moves accordingly!
Analyzed Economic Effects
3 provisions identified: 1 benefits, 2 costs, 0 mixed.
Legacy Silexx Platform Fees Removed
Cboe completed migration away from the Legacy Silexx platforms as of August 29, 2025 and will no longer offer access to those Legacy Platforms. The Exchange has removed the fees related to the Cboe Legacy Silexx platform from its Fees Schedule effective with the filing on September 10, 2025.
FIX Connection Fee Waiver Ends
The Exchange removed a prior waiver for FLEX and Cboe Silexx FIX Connections as part of its September 10, 2025 filing. Users who had been receiving that waiver will now be subject to the standard fees for those FIX connection services.
Market Data Waiver for New Users Removed
Cboe removed a prior waiver that had waived market data fees for new users of the Cboe Legacy Silexx platform during the migration to the new Silexx platform. With migration completed (as of August 29, 2025) and the September 10, 2025 filing, those market data fee waivers have been removed.
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Key Dates
Department and Agencies
Related Federal Register Documents
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)
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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.
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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
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Previous / Next Documents
Previous: 2025-18366 — Self-Regulatory Organizations; MIAX Sapphire, LLC; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend the MIAX Sapphire Fee Schedule To Establish Non-Transaction Fees Applicable to Floor Participants of the Exchange's Trading Floor
MIAX Sapphire is adding new fees for people who work on its Miami trading floor, like brokers and market makers. These fees include one-time application charges, permits, badges, desk space, remote services, and more. The changes started right away on September 11, 2025, so floor participants should be ready to pay these new costs.
Next: 2025-18368 — Self-Regulatory Organizations; MIAX Sapphire, LLC; Notice of Filing of a Proposed Rule Change To Update the Citations to Rule 600(b) of Regulation NMS
MIAX Sapphire is updating its rulebook to fix some references to a key trading rule called Rule 600(b) of Regulation NMS. This change helps keep their rules clear and up-to-date after the SEC made some updates last year. Traders and market participants will see no cost or delay—just smoother, clearer rules starting soon.
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