SEC Proposes Changes to the U.S. Market Structure

Reading time: 2 min
June 19, 2026
Author: Team Resonance
SEC Proposes Changes to the U.S. Market Structure

The U.S. Securities and Exchange Commission (SEC) proposes to repeal NMS Rule 611 and Rule 610(e), which may significantly impact market structure and competition among alternative trading venues.

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SEC Proposes Changes to the U.S. Market Structure

The U.S. Securities and Exchange Commission (SEC) has presented a proposal to repeal the NMS Rule 611 and Rule 610(e), which could drastically change the country’s market structure and competition among alternative trading venues.

Context and History of Issues

The NMS Rule 611 was introduced to prevent “market fragmentation” and to ensure competition among trading venues by adjusting trades to the best conditions. Rule 610(e) promoted the limitation of discrimination against certain trading participants. These rules were intended to facilitate a more transparent and competitive trading process.

Market Consequences

The repeal of these rules could lead to significant changes in how Alternative Trading Systems (ATS) operate and how transactions are regulated. Increased competition among trading venues could potentially lead to more efficient trading and better service for investors.

Analysis of Possible Impact

Changes could enable Alternative Trading Systems to offer more flexible terms and narrower spreads, as the existing rules no longer limit their competitive capacities. However, critics are concerned that this could lead to the isolation of some market participants and a decrease in the transparency of the trading process.

Comparison with International Practice

Such reforms are rarely seen on the international scene, as many foreign markets rely on strict regulations to maintain fairness and transparency. The U.S. could become a pioneer in this deregulatory approach to boost competition.

Conclusion:

These changes represent a significant step towards deregulating the U.S. financial markets. In the short term, this could lead to increased liquidity and improved trading conditions, but the long-term consequences will depend on the behavior of trading participants and the reaction of international regulators.

  • Strength: Increased competition in trading venues
  • Risk: Potential decrease in transparency
  • Opportunity: More efficient trading
  • Threat: Isolation of some market participants

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