IEX Locks In Rules for Stock Trading Pauses
Published Date: 12/31/2025
Notice
Summary
Investors Exchange LLC (IEX) is updating its rules to create clear, shared steps for pausing and restarting stock trading when problems pop up. This change helps everyone know exactly what to expect during trading halts, making the market smoother and safer. The new rules take effect right away and don’t impact fees or costs.
Analyzed Economic Effects
4 provisions identified: 3 benefits, 0 costs, 1 mixed.
Harmonized halt/resume rules across exchanges
IEX adopted common, harmonized criteria and procedures (matching amendments to the SIP Plans) for pausing and restarting trading in U.S.-listed equity securities so that multiple exchanges handle cross-market events consistently. The change is intended to make outcomes more predictable across trading venues during regulatory or operational issues.
Primary Listing Market sets halt start time
The Exchange will honor Regulatory Halts declared by the Primary Listing Market and treats the official start time of a Regulatory Halt as the time the Primary Listing Market declares it, regardless of when notice is disseminated. That fixed start time lets SROs revisit trades later to determine whether specific trades should stand.
IEX may call Operational Halts for its market only
IEX adopted rules defining Operational Halts as halts that apply only to IEX (not a Regulatory Halt) and authorizes IEX to implement an Operational Halt if it is experiencing Extraordinary Market Activity on the Exchange or when necessary to maintain a fair and orderly market. During an Operational Halt the Exchange will cancel all outstanding orders in its system, will not accept orders while the halt is in effect, and will resume trading at a time the Exchange specifies in a notice.
Specific resumption rules for SIP Halts
For a SIP Halt (a Regulatory Halt declared by the Primary Listing Market due to a SIP outage or material SIP latency), IEX will resume trading in a security during Regular Trading Hours after trading resumes on the Primary Listing Market or upon notice from the Primary Listing Market; if the Primary Listing Market does not open the security within the time its rules specify after the SIP Halt Resume Time, IEX may resume trading. Outside Regular Trading Hours, IEX may resume trading immediately after the SIP Halt Resume Time.
Personalized for You
How does this regulation affect your finances?
Personalize government policy and PRIA will tell you what this federal register document means for your household, plus every other regulation we track. PRIA reads each provision against your financial profile to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-20466, Adviser and Regulated Fund Custody Rules; Crypto Custody Rules
The SEC is updating rules for how investment advisers and funds handle crypto assets, making sure they keep these digital investments safe and properly reported. These changes affect advisers, funds, and anyone managing crypto securities, aiming to modernize rules and improve transparency. Comments on the proposal are open until December 7, 2026, so get ready to weigh in!
2026-19260, Rescission of Rule 14a-8's Federal Regulation of Shareholder Proposals and Amendments to Rule 14a-4
The SEC wants to stop its federal rule that controls how shareholders can make proposals at company meetings, letting state laws and company rules take over instead. They’re also changing rules so companies can sometimes vote on proposals not in their official materials—but shareholders can opt out if they want. This affects investors and companies, with comments open until November 20, 2026, and could shake up how shareholder voices are heard and counted.
2026-18424, Political Contributions by Certain Investment Advisers
The Securities and Exchange Commission (the "Commission" or the "SEC") is proposing to rescind the political contribution rule under the Investment Advisers Act of 1940 (the "Advisers Act"), which prohibits investment advisers from providing investment advisory services for compensation to a government client for two years after an adviser or any covered associate of the adviser makes a contribution to certain categories of elected officials or candidates, among other prohibitions. In the more than fifteen years since the rule was adopted, implementation challenges associated with the political contribution rule have resulted in a range of significant unintended consequences, including compliance practices among some investment advisers that may have had the effect of restricting all political contributions by the investment advisers and their employees. Market participants also have stated that the political contribution rule is burdensome, complex, and both lacks clarity and creates a de facto strict liability standard. The Commission is of the view that other existing requirements of the Advisers Act and its associated rules, including prohibitions on fraud, fiduciary duty requirements, the compliance rule, and the code of ethics rule (defined below), are likely sufficient to address pay-to-play practices while allowing an adviser the flexibility to implement an approach that is more appropriately tailored to its particular risks, rendering the political contribution rule unnecessary. The Commission also is proposing to amend the rule under the Advisers Act pertaining to books and records consistent with the proposed rescission.
2026-18190, Transfer Agent Rules
The U.S. Securities and Exchange Commission ("SEC" or "Commission") is proposing to adopt new rules, amend existing rules, amend the existing form for registration with the Commission as a transfer agent (Form TA-1) and the existing form for reporting activities of transfer agents (Form TA-2), and rescind an existing rule governing registered transfer agents. The proposals are designed to modernize the rules governing registered transfer agents.
2026-17183, Regulation Crypto Assets
The Securities and Exchange Commission ("Commission") is proposing new rules to create a tailored offering regime for certain investment contracts involving crypto assets. The proposed offering regime is intended to facilitate capital formation and accommodate innovation within the crypto asset markets while, at the same time, ensuring that investors are adequately protected and provided with the information they need to make informed investment decisions. The proposed rules would be set forth in a new regulation titled "Regulation Crypto Assets" and would include two exemptions from the registration requirements of section 5 of the Securities Act of 1933. The first exemption would permit offerings of up to $5 million during a four-year period. The second exemption would permit offerings of up to $75 million during each 12-month period. Under both exemptions, issuers would be required to make certain principles-based narrative disclosures available to their investors. In addition, issuers under the second exemption would be required to provide financial statements and would be subject to ongoing reporting requirements. Issuers that rely on these exemptions would remain subject to the antifraud and antimanipulation provisions of the Federal securities laws. The proposed rules also would include a conditional safe harbor from the term "investment contract" in the definitions of "security" in the Securities Act of 1933 and the Securities Exchange Act of 1934. If the conditions of that proposed safe harbor are satisfied, then a crypto asset would be deemed not to be subject to an investment contract for purposes of those definitions of "security."
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!
Previous / Next Documents
Previous: 2025-24044, Determination of Rates and Terms for Making and Distributing Phonorecords (Phonorecords V)
The Copyright Royalty Board is kicking off a new process to set fair prices and rules for making and sharing music recordings from 2028 to 2032. Musicians, record labels, and streaming services can join by filing a petition and paying a $150 fee by January 30, 2026. This means fresh rates are coming, so everyone involved should get ready to have their say and plan for possible changes in payments.
Next: 2025-24047, Self-Regulatory Organizations; Cboe BZX Exchange, Inc.; Notice of Filing of a Proposed Rule Change To Amend Exchange Rule 11.23(d)(2)(B) (Extending the Quote-Only Period for Initial Public Offering (“IPO”) Auctions)
Cboe BZX Exchange wants to give more time for quote-only periods during IPO auctions, especially for exchange-traded products (ETPs). This change helps traders get a better feel for new listings before trading fully starts. It mainly affects companies going public on BZX and could improve market fairness without changing costs or timing for investors.