SEC Moves to Rescind Regulation NMS Rules 611 and 610: A Paradigm Shift for U.S. Equity Markets

WASHINGTON, D.C. — June 11, 2026 — In a move that signals the most significant restructuring of U.S. equity market regulations in over two decades, the Securities and Exchange Commission (SEC) announced today that it has formally proposed the rescission of Rules 611 and 610(e) of Regulation NMS. This historic policy shift, if finalized, would dismantle the "Order Protection Rule" and the "Access Fee Cap," fundamentally altering how stocks are traded, priced, and routed across the American financial landscape.

The announcement marks a decisive pivot under the leadership of SEC Chairman Paul S. Atkins, who has long argued that the regulatory framework established in 2005 has become a relic, stifling competition and burdening market participants with unnecessary complexity.

Main Facts: The End of the "Trade-Through" Era

At the core of the SEC’s proposal is the removal of the two pillars of Regulation National Market System (Reg NMS).

Rule 611, widely known as the "Order Protection Rule," currently mandates that trading centers establish policies and procedures to prevent "trade-throughs"—transactions that occur at a price inferior to the best-displayed quote on another exchange. By requiring brokers to route orders to the venue with the "best" price, the rule intended to foster competition between exchanges. However, critics argue it has led to a fragmented market where liquidity is scattered across dozens of dark pools and exchanges, forcing high-speed technology to dictate execution rather than fundamental supply and demand.

Rule 610(e), meanwhile, serves as the "Access Fee Cap," limiting the fees that trading venues can charge participants for accessing their protected quotations. By proposing the rescission of these rules, the Commission aims to move toward a model where market forces, rather than government mandates, dictate order routing and execution quality.

"After two decades of Rule 611, it is high time that the Commission review its unintended consequences that have hindered—rather than enhanced—the long-term growth of our markets," Chairman Atkins stated during the announcement. "This proposal is intended to simplify market structure and reduce costs for market participants while allowing competition, innovation, and other market forces to shape the continuing evolution of our equity markets."

Chronology: Two Decades of Market Evolution

To understand the weight of this decision, one must look back at the origins of Regulation NMS.

• 2005: The SEC adopts Regulation NMS to modernize and consolidate the national market system. The goal was to ensure investors received the best price for their orders, creating a "level playing field."
• 2007: Implementation of the Order Protection Rule (Rule 611) becomes fully effective. The era of high-frequency trading (HFT) begins to accelerate as firms build sub-millisecond systems to navigate the complexities of "protected" quotes.
• 2010–2015: Market structure debates intensify following the "Flash Crash" of 2010. Scholars and regulators begin to debate whether the fragmentation caused by Reg NMS has actually made markets more volatile and less transparent.
• 2020–2024: The rise of retail-centric trading platforms and the growth of off-exchange trading (dark pools) put unprecedented pressure on the existing framework. Market participants increasingly argue that "protected" quotes are often phantom liquidity that disappears the moment a trader tries to access it.
• June 11, 2026: The SEC formally proposes the rescission of Rules 611 and 610(e), initiating a 60-day public comment period.

Supporting Data: The Case for Deregulation

The SEC’s proposing release highlights several key data points that have driven the Commission to take this drastic step.

1. Market Fragmentation and Complexity

Data indicates that since 2005, the number of trading venues has exploded. While this was intended to increase competition, the SEC’s analysis suggests it has increased the "routing complexity" for brokers. Investors are currently subject to a "spaghetti bowl" of connectivity, where brokers must route orders through dozens of venues to comply with the Order Protection Rule, often at the expense of latency and execution certainty.

2. The Cost of Compliance

The administrative burden of maintaining compliance with Reg NMS is estimated to cost the industry billions of dollars annually. By removing the mandate to chase the "best displayed price," the SEC anticipates a reduction in the "tech arms race" currently dominated by firms with the fastest fiber-optic cables and most sophisticated HFT algorithms.

3. Fee Transparency

The SEC notes that the "Maker-Taker" model—where exchanges pay for liquidity and charge for taking it—has become distorted by the fee caps in 610(e). Many market participants argue that these caps have created a "rebate addiction" that misaligns the interests of brokers and their clients. By removing the cap, the SEC hopes to allow for more transparent, market-driven pricing models.

Official Responses and Industry Sentiment

The proposal has ignited a firestorm of debate across the financial sector.

Proponents: The "Market-Forces" Camp

Many institutional investors and market-neutral firms have welcomed the news. Proponents argue that the removal of Rule 611 will allow brokers to focus on "best execution" rather than just "best price." In modern markets, "best execution" involves factors like price improvement, speed, and the likelihood of filling a large order—all of which are often ignored by the blunt-force mechanics of Rule 611.

Skeptics: The "Investor Protection" Camp

Conversely, some investor advocacy groups have expressed alarm. They worry that without the requirement to trade at the best price, retail investors could be disadvantaged. "The fear is that we return to a ‘Wild West’ scenario where brokers route orders to venues that pay the most for order flow, rather than the venue that offers the best deal for the investor," noted one market analyst.

The SEC’s Stance

Chairman Atkins has remained firm, emphasizing a "careful, deliberative approach." He stated, "I look forward to reviewing public comments as we take a careful, deliberative approach to avoid repeating the same mistakes that brought us here." The Commission is clearly signaling that it views the current regulatory burden as a net negative for the average investor’s long-term returns.

Implications: A New Era for Equity Trading

What will the post-Reg NMS landscape look like? The implications are far-reaching and will likely affect every participant in the equity markets.

Impact on Retail Investors

For the individual investor, the rescission of these rules could mean more stable execution. If brokers are no longer forced to route orders through disparate, unreliable venues just to "check the box" on price protection, they may be able to provide more consistent fills. However, the industry must be vigilant to ensure that the removal of these rules does not lead to a degradation of price quality.

Impact on Exchanges

Traditional exchanges like the NYSE and Nasdaq may face increased pressure to innovate. Without the government-mandated "protection" of their quotes, exchanges will have to compete on the basis of service quality, technology, and transparent pricing. This could lead to a consolidation of liquidity, as trading may naturally flow toward the venues that provide the most genuine value to participants.

The Technological Shift

The "Latency War" may finally cool down. If the regulatory requirement to route to the fastest-moving quote is removed, firms may spend less on expensive, ultra-low-latency infrastructure and more on investment strategy and research. This could shift the focus of market competition back toward fundamental analysis and liquidity provision rather than technological arbitrage.

Moving Forward: The Comment Period

The SEC’s proposal is not yet law. The agency has opened a 60-day public comment period following the publication of the proposing release in the Federal Register. During this window, the Commission expects to receive thousands of letters from hedge funds, retail brokerages, academic institutions, and individual traders.

The Commission has made it clear that it is not rushing the process. "We are committed to a transparent, inclusive process," a Commission spokesperson said. "The goal is not just to rescind a rule, but to build a more robust, efficient, and equitable market structure for the next twenty years."

As the industry prepares for this transition, all eyes will be on Washington. The rescission of Rules 611 and 610(e) is not merely a technical adjustment; it is a fundamental shift in the philosophy of U.S. capital markets—moving away from government-mandated order flow and toward a model of decentralized, competition-driven trading.

For the American financial system, the next 60 days—and the months of rule-making that follow—will determine whether the market moves toward a more efficient future or if the removal of these guardrails introduces new, unforeseen systemic risks. As Chairman Atkins aptly put it, the goal is to "avoid repeating the same mistakes," a sentiment that echoes the caution with which the entire financial world is watching this historic development.