Cboe Speeds Up Auction Responses: Faster Trades, Same Old Rules
Published Date: 3/30/2026
Notice
Summary
Cboe Exchange is updating how it handles auction responses to speed things up and make trading smoother for investors and traders. The Securities and Exchange Commission quickly approved these changes, which will take effect soon and could help markets work better without extra costs. This update mainly affects people using Cboe’s auction system for certain types of trades.
Analyzed Economic Effects
4 provisions identified: 3 benefits, 1 costs, 0 mixed.
Non‑FLEX auctions: 1‑second processing cap
If you submit responses to Cboe non‑FLEX option auctions, the Exchange may now allow the auction exposure period plus post‑auction processing to run up to 1000 milliseconds (1,000 ms) total. The change lets the system continue processing messages received before the auction end for a longer buffer so more timely responses may be included in the auction.
SPX non‑FLEX: 900 ms buffer made permanent
For non‑FLEX SPX options, the longer auction response processing time that had been set to 900 milliseconds will be preserved on a permanent basis. Previously that 900 ms setting was in place under a temporary/sunset schedule (noted in the filing as in place until June 30, 2026).
Potential for more price improvement and liquidity
The Exchange says the longer processing buffer may let more auction responses participate, which could increase execution opportunities and price improvement for auctioned orders and may encourage liquidity providers to submit more responses, deepening auction liquidity. The filing ties these benefits to times of high message traffic and volatility.
FLEX auctions excluded from increase
FLEX auctions (FLEX Auction Process, FLEX AIM, and FLEX SAM) are excluded from the longer auction response processing time and will continue to operate under their existing longer exposure periods. The Exchange said FLEX auctions did not show missed responses and have different liquidity and timing needs.
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
2026-12163 — The Trade-Through Rule and Locked and Crossed Markets Provisions of Regulation NMS
The SEC wants to scrap some old rules that stop stocks from being traded at worse prices and prevent confusing market quotes. This change affects stock traders and exchanges, aiming to simplify trading and possibly speed things up. If you want to share your thoughts, you’ve got until August 17, 2026, so don’t miss out!
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!
2026-13638 — Goehring & Rozencwajg Investment Funds and Goehring & Rozencwajg Associates, LLC
Goehring & Rozencwajg want to offer a new kind of investment fund that mixes exchange-traded shares (like ETFs) with regular mutual fund shares all in one fund. This change could make investing more flexible and easier for their customers. If no one asks for a hearing by July 27, 2026, the SEC will likely approve this new setup soon.
2026-13648 — Self-Regulatory Organizations; Financial Industry Regulatory Authority, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change to Except Accounts Pursuant to Section 530A of the Internal Revenue Code From the Requirements of FINRA Rule 3210 (Accounts At Other Broker-Dealers and Financial Institutions)
FINRA is updating its rules to exclude certain accounts protected under a new tax law (Section 530A) from extra paperwork and approval steps. This change helps financial pros handle these special accounts more easily, starting right away with no extra costs. If you work with broker-dealers or financial institutions, this means smoother account management from now on!
Previous / Next Documents
Previous: 2026-06043 — Self-Regulatory Organizations; National Securities Clearing Corporation; Notice of Filing of Proposed Rule Change Concerning a New Customer Net Margin Account Option for Agent Clearing Members in the Securities Financing Transaction Clearing Service
The National Securities Clearing Corporation (NSCC) wants to add a new net margin account option for agent clearing members using its securities financing transaction service. This change aims to make margin management smoother and more flexible for these members, potentially affecting how they handle money and risk. The proposal is open for public comments starting March 30, 2026, so interested folks can weigh in before it moves forward.
Next: 2026-06045 — Self-Regulatory Organizations; Nasdaq Texas, LLC; Notice of Filing and Immediate Effectiveness of Proposed Rule Change To Establish Dual Listing Fees for the Exchange
Nasdaq Texas is rolling out new fees for companies that list their stocks on both Nasdaq Texas and another exchange at the same time. This change affects businesses with dual listings and starts immediately, helping Nasdaq Texas cover costs while keeping things fair. If you’re a company thinking about listing, get ready to pay these new fees starting now!