# 2026-11813: Cboe BYX Rolls Out Fee for Trading Clock Sync

2026-11813, Self-Regulatory Organizations; Cboe BYX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Adopt Fees for Its New Clock Service, is a Federal Register notice from Securities and Exchange Commission published 2026-06-12, effective 2026-05-18; PRIA reads it as touching household money (as of 2026-06-19).

- Canonical: https://policyrisk.com/federal-register/2026-11813
- As of: 2026-06-19
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-11813
- Title: Self-Regulatory Organizations; Cboe BYX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Adopt Fees for Its New Clock Service
- Type: Notice
- Agencies: Securities and Exchange Commission
- Citation: 91 FR 35766
- Published: 2026-06-12
- Effective: 2026-05-18
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-06-19

## In one line

Cboe BYX Rolls Out Fee for Trading Clock Sync

## Summary

Cboe BYX Exchange just rolled out a new Clock Service that helps users sync their time systems for better trading accuracy. Starting May 18, 2026, they’re charging fees for this service but also offering a free trial to get everyone on board. This affects both members and non-members who want precise timing in their trading activities.

## Effects PRIA read

- Monthly Clock Service Subscription Fee: cost, high. If your firm subscribes to Cboe BYX’s Clock Service, the Exchange will charge $7,500 per month for the Clock Service itself. That $7,500/month fee includes a single 1 Gbps physical port and the service became effective May 18, 2026.
- Optional Redundant Connection Fee: cost, high. Subscribers may buy an optional redundant Clock Service connection (an additional 1 Gbps physical port) for $2,500 per month. Firms may purchase multiple secondary connections if they choose.
- One-Time HATI Licensing Setup Fee: cost, high. If your firm does not use a Safran White Rabbit-enabled switch, you must pay a one-time High-Accuracy Timing IP Core (HATI) setup license fee of $5,000 for each physical connection. For example, buying the primary and a secondary connection and needing HATI licensing for both would incur $10,000 in…
- 30-Day Free Trial for New Subscribers: benefit, high. First-time subscribers to the Cboe Clock Service receive a free trial for the first 30 days that waives the monthly Clock Service fee. The trial applies only to the Clock Service monthly fee; subscribers remain liable for any one-time HATI setup fees and for any additional connections during the tr…
- Mid-Month Proration and Cancellation Terms: benefit, low. For mid-month subscriptions, monthly Clock Service fees are prorated based on the subscription start date; the proration does not apply to the one-time HATI setup fee. Subscribers may cancel the Clock Service at any time.
- Included 1 Gbps Port Use Restriction and Multi-Exchange Access: mixed, low. The Clock Service’s included 1 Gbps physical port is provided solely to receive the Exchange’s time signal and cannot be used for other purposes (for example, order routing). The Clock Service can be used to access time signals for all eight Cboe affiliated equities and options exchanges.

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- [2026-12163](https://policyrisk.com/federal-register/2026-12163): The Trade-Through Rule and Locked and Crossed Markets Provisions of Regulation NMS, 2026-06-17

## Sources
- [2026-11813 on federalregister.gov](https://www.federalregister.gov/documents/2026/06/12/2026-11813/self-regulatory-organizations-cboe-byx-exchange-inc-notice-of-filing-and-immediate-effectiveness-of)
- [2026-11813 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-06-12/pdf/2026-11813.pdf)

## Related
- [Previous: 2026-11812, Self-Regulatory Organizations; Cboe EDGA Exchange, Inc.; Notice of Filing and I…](https://policyrisk.com/federal-register/2026-11812)
- [Next: 2026-11814, Self-Regulatory Organizations; Cboe BZX Exchange, Inc.; Notice of Filing and Im…](https://policyrisk.com/federal-register/2026-11814)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-11813 (as of 2026-06-19).