On June 11, 2026, the U.S. Securities and Exchange Commission voted to propose rescinding Rules 611 and 610(e) of Regulation NMS — the Order Protection Rule and the locked/crossed markets prohibition that have governed U.S. equity market structure since 2005. The proposal opens a 60-day public co...
"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." — Paul S. Atkins, Chairman, U.S. Securities and Exchange Commission
On June 11, 2026, the U.S. Securities and Exchange Commission voted to propose rescinding Rules 611 and 610(e) of Regulation NMS — the Order Protection Rule and the locked/crossed markets prohibition that have governed U.S. equity market structure since 2005. The proposal opens a 60-day public comment period, with a final rule expected by Q1 2027 according to policy analysts at TD Cowen's Washington Research Group.
The immediate effect on traditional markets is a shift from per-trade order protection to a principles-based best execution standard under FINRA Rule 5310. The secondary effect — and arguably the more consequential one — is the removal of what Galaxy Digital's head of research Alex Thorn described as "one of the biggest structural barriers to tokenized US equities trading in DeFi." Automated market makers, which execute against algorithmic bonding curves at block time, cannot query the National Best Bid and Offer (NBBO) or pause a swap because a better quote exists on the New York Stock Exchange. Under Rule 611, any broker interfacing with a DeFi pool trading tokenized equities would be in near-constant violation. That constraint now has a defined expiration date.
The proposal lands amid a broader convergence: DTCC will begin limited production trades of tokenized Russell 1000 equities and U.S. Treasuries in July 2026. Tokenized stock market capitalization grew approximately 2,878% year-over-year to $963 million as of January 2026, and daily trading volume reached an all-time high of $3.57 billion by May. The regulatory and infrastructure pipelines are aligning simultaneously for the first time.
Rule 611, adopted April 6, 2005 as part of Regulation NMS, prohibits "trade-throughs" — executions at prices inferior to protected quotations displayed on other trading venues. The SEC's original intent was to ensure that investors' limit orders on one exchange would not be ignored while worse-priced trades executed elsewhere. Rule 610(e) complements this by prohibiting market venues from displaying quotations that lock or cross against quotes on competing platforms.
For two decades, these rules formed the backbone of U.S. equity market structure. They ensured price continuity across 16 registered exchanges and dozens of alternative trading systems. They also, according to critics, incentivized exchange proliferation — the U.S. now has 16 stock exchanges compared to seven when Regulation NMS was adopted — and created a complex web of routing obligations that added latency and cost.
The SEC's June 11 proposal (Release No. 34-103585) argues that technological advances in order routing, market data distribution, and competitive dynamics among exchanges have rendered the trade-by-trade order protection mandate obsolete. The core claim: brokers already pursue best execution as a competitive necessity, and the per-trade compliance burden of Rule 611 imposes costs without commensurate investor benefit.
The rescission proposal has implications well beyond traditional equity markets. Automated market makers — the algorithmic systems that power decentralized exchanges — operate fundamentally differently from order-book exchanges.
An AMM executes transactions against a liquidity pool at a price determined by a mathematical bonding curve at the moment of block confirmation. It does not query external price feeds. It does not route orders to competing venues. It cannot pause a swap mid-execution because a better quote appeared on Nasdaq 200 milliseconds earlier.
Under Rule 611's framework, every transaction on an AMM offering tokenized U.S. equities would constitute a regulatory violation. As Thorn noted, any AMM pool trading tokenized stocks "would commit trade-throughs constantly and arguably be an illegal trading center." Rule 610(e) compounds this: AMMs inherently produce prices that may lock or cross quotes on registered exchanges, placing them in continuous violation of the locked/crossed markets prohibition.
This created a hard regulatory ceiling on tokenized equity trading. Platforms could offer synthetic exposure to stock prices — and several did — but could not offer tokenized versions of actual registered securities through AMM-based trading without running afoul of Regulation NMS.
The SEC proposes replacing the per-trade order protection mandate with reliance on existing best execution obligations at the broker-dealer level, primarily governed by FINRA Rule 5310.
Under 5310, broker-dealers must use "reasonable diligence" to ascertain the best market for a security and execute so the resultant price is "as favorable as possible under prevailing market conditions." This is a principles-based standard assessed across a firm's overall execution quality, not a trade-by-trade compliance test.
The practical difference is significant. A broker routing orders to an on-chain venue would need to demonstrate policies reasonably designed to achieve best execution overall — periodic reviews of execution quality, documentation of venue selection rationale, and regular compliance assessments. It would not need to prove NBBO compliance on every individual swap.
The comment period runs 60 days from publication in the Federal Register (published June 17, 2026). Policy analysts at TD Cowen expect a final SEC vote by Q1 2027.
The June 11 vote reflected broad support among the current commission:
Chairman Paul S. Atkins framed the proposal as correcting a 20-year-old policy error, noting that Rule 611's "unintended consequences" had "hindered — rather than enhanced — the long-term growth of our markets." Atkins was a commissioner in 2005 and voted against Regulation NMS at its adoption.
Commissioner Mark T. Uyeda stated that "market participants have repeatedly said that in today's evolving technology-driven trading environment, these provisions often introduce unnecessary complexities, burdens, and inefficiencies."
Commissioner Hester Peirce argued in her supporting statement that the Order Protection Rule had "helped fuel disorder" by encouraging exchange proliferation and suppressing innovation within exchanges, rather than protecting investors. She titled her statement "Disorder Protection Rule" — a pointed inversion of the rule's formal name.
The alignment among three commissioners suggests the final rule has sufficient support to pass, barring a significant shift during the comment period.
The tokenized equities market remains small in absolute terms but is growing at an exceptional rate:
The quoted sector market cap varies by methodology: $5.5 billion according to The Block/Binance Research (June 2026), versus approximately $1.08 billion in live circulating value on CoinGecko — reflecting differences between represented asset value and actual circulating token supply.
The regulatory proposal coincides with infrastructure buildout by the primary U.S. equities clearing house. The Depository Trust and Clearing Corporation (DTCC) received a No-Action Letter from the SEC on December 11, 2025, authorizing a three-year pilot program for tokenizing securities held at The Depository Trust Company.
Key milestones:
Separately, both Nasdaq and the New York Stock Exchange are building blockchain settlement infrastructure. The convergence of clearing house tokenization, exchange infrastructure development, and regulatory rule changes represents the most coordinated institutional move toward on-chain equities to date.
Several platforms are building or expanding tokenized equity offerings:
Kraken operates xStocks with more than $30 billion in total transaction volume and $6 billion settled on-chain as of early June 2026. It reported 125,000+ unique holders globally.
Robinhood launched the public testnet for Robinhood Chain — an Ethereum Layer 2 built on Arbitrum Orbit technology — on February 10, 2026. CEO Vlad Tenev announced four million testnet transactions by February 19. Partners include Alchemy, Chainlink, LayerZero, and TRM Labs. Mainnet launch is planned for later in 2026.
Coinbase launched traditional stock and ETF trading within its app (via Apex Fintech Solutions partnership) and is developing its Coinbase Tokenize platform for institutional asset tokenization.
tZERO, backed by Intercontinental Exchange, is preparing for an IPO.
The Rule 611 rescission, if finalized, would allow these platforms to offer AMM-based trading of tokenized registered securities — a structural shift from the current framework where they operate under various exemptions or offer synthetic products rather than direct equity tokens.
Comment period outcomes. The 60-day comment period will surface opposition from traditional exchange operators who benefit from current routing mandates. The NYSE and Cboe have historically defended Rule 611 as essential to investor protection. Whether their objections slow or modify the final rule remains uncertain.
Best execution adequacy. Critics argue that removing Rule 611 without strengthening best execution oversight could harm retail investors whose orders are routed to venues offering inferior prices. The SEC's 2022 Regulation Best Execution proposal was never finalized; the current approach relies on FINRA Rule 5310, which some legal scholars consider less prescriptive.
Tokenized equity legal classification. The January 2026 SEC guidance distinguished genuine issuer-sponsored equity tokens from synthetic derivatives, but the boundaries remain untested in enforcement. Whether AMM-traded tokenized equities qualify under the exemption framework has not been adjudicated.
Settlement finality. On-chain settlement is near-instantaneous, but reconciliation with off-chain ownership records, corporate actions (dividends, voting rights), and tax reporting systems remains technically complex. The DTCC pilot will be the first large-scale test of this integration.
Liquidity fragmentation. Removing Rule 611 could fragment liquidity across on-chain and off-chain venues. The counterargument — that competition will improve execution quality — is theoretically sound but empirically unproven for equity markets.
The SEC's proposed rescission of Rule 611 represents the most significant U.S. equity market structure change in two decades. Its primary stated purpose — eliminating an outdated per-trade compliance burden — is a traditional market structure reform. Its secondary effect — clearing the path for AMM-based tokenized equity trading — connects directly to the $963 million (and growing) tokenized equities market and the institutional infrastructure being built by DTCC, Kraken, Robinhood, and others.
The economic question is whether the value currently captured by the inter-exchange routing complex — speed advantages, data fees, co-location revenues — will migrate partially to on-chain venues where settlement is faster and intermediary layers are fewer. The DTCC pilot beginning in July 2026 will provide the first production data on that question.
The proposal is not final. A comment period, potential reproposal, and implementation timeline mean tokenized equities will not trade on fully legal AMM rails until 2027 at the earliest. But the regulatory intent is now explicit, the infrastructure is under construction, and the institutional participants are committed. The structural barriers are being removed in sequence.