SEC proposal to scrap key Reg NMS rules could reopen the design space for tokenized stocks

The Securities and Exchange Commission’s latest market-structure proposal is not a crypto rulemaking on its face, but it could still become one of the more consequential U.S. policy developments for tokenized equities this year. On June 11, the agency proposed rescinding Regulation NMS Rules 611 and 610(e), two provisions that have shaped listed-stock execution for roughly two decades. For traditional equity venues that means a new debate over fragmentation, best execution and quote competition. For tokenized-stock builders, it means the SEC is questioning exactly the kind of rigid market assumptions that have made blockchain-native secondary trading so hard to map onto U.S. securities rules.

The official proposal is narrow in form and broad in consequence. Rule 611 is the trade-through rule, which generally bars an execution at a price worse than the best automated quote displayed by another trading venue. Rule 610(e) restricts locked and crossed quotations in national market system stocks. In its press release and fact sheet, the SEC said it also wants to rescind related defined terms and make conforming changes elsewhere in the rulebook. The agency opened a 60-day public comment period after Federal Register publication, signaling that this will be a live policy fight rather than a symbolic discussion paper.

The SEC’s rationale is notable because it is rooted in core equity-market mechanics, not tokenization rhetoric. In the fact sheet accompanying the proposal, the Commission said U.S. markets have become far more competitive, interconnected and automated since 2005, and that the current rules have added costs, increased complexity, limited order-handling choices and contributed to fragmentation. Chairman Paul Atkins put the point more sharply in the agency release, arguing that the long-run effect of Rule 611 has been to hinder rather than enhance market development. That matters because the Commission is not merely offering narrow relief for digital assets. It is challenging whether the post-2005 architecture still fits the market it now oversees.

That challenge is directly relevant to tokenized stocks. Any venue that wants to support secondary trading in representations of listed U.S. equities runs into a fundamental design problem when every execution must be reconciled against an external best bid and offer across the national market system. Central limit order books can be engineered around that requirement, albeit with cost and complexity. Automated market makers, continuous onchain pools and 24-hour blockchain-native trading environments have a much harder time doing so cleanly. The result is that tokenized equities have often been pushed toward highly intermediated, permissioned or economically synthetic structures rather than open market formats.

Rescinding Rules 611 and 610(e) would not suddenly make tokenized U.S. stocks simple or permissionless. Securities issuance, distribution restrictions, broker-dealer obligations, transfer controls, custody arrangements, disclosures and investor-protection standards would still matter. Issuers would still need to decide whether tokenholders receive direct security entitlements, economic exposure only, or some hybrid structure. But removing these two rules could ease one important source of friction: the requirement that a tokenized market mirror the operating logic of an exchange ecosystem built around fragmented, venue-by-venue quote protection.

That is why the proposal deserves attention beyond Washington process coverage. Over the past several months, tokenized stock products have expanded across wallets, offshore exchanges and specialized issuer platforms, but most of that growth has happened under structures designed to avoid the hardest parts of open secondary trading. Some products function more like issuer-controlled wrappers. Others rely on perpetuals or synthetic exposure rather than direct asset-backed tokenization. A softer quote-protection regime would not erase those models, but it could make room for more experimentation in how compliant tokenized stocks are priced, matched and distributed.

There is also an important timing factor. The SEC proposal arrives just as tokenized equities are moving from niche proofs of concept into a more serious distribution phase, with new wallet integrations, cross-chain expansion and growing attention from infrastructure providers. If the rule change advances, builders will have an incentive to revisit designs that were previously too awkward or too expensive under the existing NMS framework. That could include more flexible execution logic, different forms of liquidity aggregation and more credible efforts to bridge regulated securities distribution with blockchain-native market hours and settlement expectations.

For now, the practical takeaway is simple. The SEC has not approved DeFi trading in U.S. stocks, and it has not removed the broader securities-law perimeter around tokenized equities. But it has opened the door to a market-structure rethink that aligns more naturally with how onchain systems are built. The next phase to watch is the comment process, followed by how issuers, brokerages, wallet providers and tokenization platforms respond. If those groups see a path to lower compliance friction without abandoning investor protections, this proposal could end up widening the real design space for tokenized stocks in a way few crypto-specific policy announcements have done.