SEC Proposes Scrapping Reg NMS Trade-Through Rule In Move To Ease Market Complexity

The US Securities and Exchange Commission has opened the door to a major rethink of how American equity markets route trades, proposing to remove the trade-through rule that has shaped market structure since the mid-2000s. The rule was designed to stop trades from executing at worse prices when a better quote was displayed elsewhere. Critics have long argued that it also forced participants into a complex web of routing obligations, protected quotes, and compliance checks.

Rule 611 is often called the trade-through rule. It prevents trading centers from executing orders at prices inferior to protected quotations displayed by other venues. On paper, that sounds like basic investor protection. In a fragmented market, however, it also creates a dense routing system where venues, brokers, and market makers must monitor quotes across the national market system and route around protected prices.

The SEC says its proposal would rescind Rule 611, Rule 610(e), and related defined terms. Rule 610(e) deals with locked and crossed quotations. Together, these changes would reduce a layer of mandatory venue interaction and place more responsibility on competition and execution quality rather than a rigid routing framework.

Tokenized equity platforms have a simple pitch: faster settlement, programmable ownership, fractional access, and trading infrastructure that can operate differently from legacy exchanges. The challenge is that any venue dealing with securities eventually runs into the existing market-structure rulebook. Removing a legacy routing obligation would not automatically legalize or green-light tokenized equities, but it could reduce some of the friction around alternative execution models.

The proposal is not final. Public comments remain part of the process, and market incumbents are likely to push competing views. Large exchanges, brokers, high-frequency firms, and alternative trading systems all have reasons to argue over how much protection Rule 611 still provides and how much complexity it creates.

For crypto markets, the safer takeaway is this: the SEC is not directly handing tokenized equities a green light, but it is challenging one of the assumptions baked into traditional equity trading. If blockchain-based securities venues want to compete, a simpler and more flexible market-structure environment would be a useful starting point.