EDGX Offers Clock Service: Sync Up or Miss the Tick-Tock Trade
Published Date: 3/31/2026
Notice
Summary
Cboe EDGX Exchange is rolling out a new Clock Service that helps traders and firms sync their clocks perfectly with the Exchange’s time. This means everyone can measure trade times more accurately, making the market fairer and faster. The service is optional, open to all members and non-members, and is effective immediately with no extra fees announced yet.
Analyzed Economic Effects
5 provisions identified: 2 benefits, 1 costs, 2 mixed.
Sub‑Nanosecond Time Sync Precision
The Clock Service provides White Rabbit and Precision Time Protocol synchronization that can achieve up to sub-nanosecond alignment and the Exchange will provide timestamps at a nanosecond level by the end of March. Subscribers can synchronize their primary clocks to the Exchange to measure latency more precisely between their systems and the Exchange.
Optional Clock Service for All Firms
If your firm trades on or interacts with Cboe EDGX, the Exchange is offering an optional Clock Service available to Members and non-Members alike. The service is immediately effective (filed March 17, 2026) and subscribers receive a dedicated 1 Gbps Physical Port as part of the offering.
Third‑Party White Rabbit Equipment Required
Firms that do not already have a White Rabbit clock synchronization device must acquire one from a third‑party vendor and procure any applicable licenses themselves. The Exchange does not provide the White Rabbit device or optics; participants are responsible for procuring necessary hardware and licenses.
Dedicated 1 Gbps Port, Single‑Use Only
Subscribers receive a dedicated 1 Gbps Physical Port included with the Clock Service that must be used solely for the Clock Service and cannot be used for other purposes like order routing. One 1 Gbps port will cover the Exchange and its affiliated equities and options exchanges for the Clock Service.
Fees To Be Filed Separately
The Exchange intends to submit a separate filing to propose fees for the Clock Service; no fees are announced in this filing. Firms should expect a future fee filing before final fee amounts are applied.
Your PRIA Score
Personalized for You
How does this regulation affect your finances?
Sign up for a PRIA Policy Scan to see your personalized alignment score for this federal register document and every other regulation we track. We analyze your financial profile against policy provisions to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-10373 — Registered Offering Reform
The SEC wants to make it easier and cheaper for more companies to sell their stocks and bonds to the public. They’re opening up special forms and benefits to more businesses, updating rules to be more modern, and cutting red tape by overriding some state rules. If you’re a company planning to raise money, these changes could speed things up and save you money, with feedback due by July 27, 2026.
2026-10222 — Enhancement of Emerging Growth Company Accommodations and Simplification of Filer Status for Reporting Companies
The SEC is making it easier for companies that report their finances by simplifying their categories into just two groups: big and small filers. Smaller companies, including emerging growth ones, will get more time to file reports and enjoy simpler rules, while big companies keep stricter standards. These changes aim to save time and money, with feedback open until July 20, 2026.
2026-07651 — Concept Release on Consolidated Audit Trail and Other Audit Trails and Data Sources
The SEC wants your thoughts on how it tracks stock market trades using the Consolidated Audit Trail and other data tools. They’re thinking about updating rules to keep up with new tech, privacy, and security needs, and to make sure the system is fair and cost-effective. If you’re involved in the stock market or data tracking, speak up by June 22, 2026!
2026-11479 — Self-Regulatory Organizations; Nasdaq PHLX LLC; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule General 8 Regarding Intrafirm Cabinet Connectivity
Nasdaq PHLX is updating its rules to clearly include non-contiguous intrafirm cabinet connectivity as part of its fiber services and is adjusting the fees for this service. This change affects firms using Nasdaq’s cabinet connections and takes effect immediately, helping them understand costs better and plan accordingly. No big money surprises, just clearer rules and fees starting now!
2026-11483 — Self-Regulatory Organizations; LCH SA; Order Approving Proposed Rule Change Relating to the Extension of Eligible Collateral to U.S. Treasury Securities and Related Changes
LCH SA, a big player in clearing credit swaps, is now accepting more types of U.S. Treasury securities as collateral to keep things safer and smoother. This change helps protect against risks if a member can’t pay up and starts June 9, 2026. Clearing members who provide collateral will have more options, making the whole system stronger and more flexible.
2026-11481 — Self-Regulatory Organizations; Nasdaq ISE, LLC; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Amend Rule General 8 Regarding Intrafirm Cabinet Connectivity
Nasdaq ISE is updating its rules to clearly include non-contiguous intrafirm cabinet connections as part of its fiber connectivity services and is adjusting the fees for this service. This change affects firms using Nasdaq’s cabinet space to connect their equipment and takes effect immediately, so they should review the new fee structure soon. It’s a smooth move to keep things clear and fair for everyone using these connections.
Previous / Next Documents
Previous: 2026-06150 — Self-Regulatory Organizations; Cboe EDGA Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Introduce an Exchange Clock Service
Cboe EDGA Exchange just launched a new Clock Service that helps traders sync their clocks perfectly with the Exchange’s time. This means better accuracy in tracking orders and messages, helping everyone trade smarter and faster. The service is optional, open to all, and already effective as of March 17, 2026—no extra fees or delays announced yet!
Next: 2026-06152 — Self-Regulatory Organizations; Cboe BZX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Amend Rule 11.22 To Introduce the Exchange's Clock Service
Cboe BZX Exchange just launched a cool new Clock Service that helps traders sync their clocks with the Exchange’s time. This means better accuracy when tracking orders and messages, making trading smoother for everyone involved. The service is optional, open to all members and non-members, and is effective immediately—no waiting around!