Why Rule 605 Must Be Updated Before Other Rulemaking: A Video Blog

Published on:
October 31, 2023
By:
  • SIFMA Editors

The U.S. equity markets play a critical role in helping companies expand and grow and helping individuals and families achieve their financial goals. Studies show that stock market investors today are younger, increasingly diverse and, importantly, more representative of the broader U.S. population in terms of income.

The structure of our vibrant and liquid equity market benefits investors and issuers alike. Yet, the SEC recently issued several proposals that would dramatically restructure U.S. equity market structure and potentially undermine the recent expansion of market access and the financial benefits that investors enjoy today. The one proposal SIFMA supports is the change to Reg NMS Rule 605, which would update the data that measures market quality for everyday individual investors.

Rule 605 has not been substantively updated since its adoption in 2000. SIFMA believes this is a natural starting point for the path forward.

Instead of rushing to finalize all four rules at the same time, the SEC should first update Rule 605 to obtain the baseline data needed to accurately assess market quality. Then, after analyzing the new data, determine whether more rulemaking is needed and conduct robust economic analysis to ensure any changes benefit all investors.

For more on this important issue, visit https://www.sifma.org/equity.

Related Resources

Details

More Content

  • Press Releases
    Feb 02, 2026

    SIFMA Fixed Income Market Close Recommendation in the US, the UK and Japan for Presidents Day

    SIFMA has confirmed its previous recommendation for a full market close on Monday, February 16, 2026 for the trading of U.S. dollar-denominated fixed income securities in the U.S., the U.K. and Japan in observance of the U.S. Presidents Day Holiday.
  • Pennsylvania + Wall
    Jan 22, 2026

    The Power of Community, A Legacy of Leadership

    As the 2026 SIFMA C&L Annual Seminar approaches, Chair Mark Seffinger emphasizes the importance of leadership and community. He highlights the seminar's focus on inclusivity, continuous learning, and networking opportunities.
  • Press Releases
    Jan 07, 2026

    Todd Klessman Joins SIFMA as Managing Director, Financial Services Cyber & Technology

    SIFMA has appointed Todd Klessman as Managing Director for Financial Services Cyber & Technology, effective January 12, 2026. He will advise on Business Continuity Planning and Cybersecurity, addressing key issues for the financial services industry. Klessman previously worked at CISA and holds a Juris Doctor from The University of Michigan. SIFMA advocates for the financial services sector and promotes market resilience.

Get the latest trends, stats, and research on financial markets and securities.