Catenaa, Thursday, June 18, 2026- The US Securities and Exchange Commission may have quietly taken one of the most important steps yet toward integrating traditional stock markets with blockchain technology after proposing the removal of a two-decade-old trading rule that many industry experts believe has prevented tokenized US equities from operating effectively on decentralized finance networks.
The proposal targets Rule 611 of Regulation NMS, a cornerstone of US market structure since 2005 that requires stock orders to be executed at the best available price across registered exchanges.
While originally designed to protect investors, blockchain advocates argue the rule has become one of the largest regulatory obstacles preventing tokenized stocks from functioning at scale on decentralized platforms.
If finalized, the change could unlock a new phase in the tokenization of traditional financial assets and potentially accelerate Wall Street’s migration toward blockchain-based infrastructure.
Rule 611, often referred to as the Order Protection Rule, requires brokers and trading venues to ensure stock trades receive the best available price across all registered exchanges.
The regulation forms the foundation of the National Best Bid and Offer system, commonly known as NBBO.
For traditional stock exchanges, compliance is straightforward.
For decentralized finance platforms, however, the requirement creates a fundamental conflict.
Most DeFi systems use automated market makers, or AMMs, which determine prices through mathematical formulas rather than routing orders to external exchanges.
As a result, a tokenized stock traded through an AMM could theoretically violate Rule 611 with nearly every transaction.
Industry participants have long argued that this makes large-scale decentralized trading of tokenized US equities practically impossible under existing regulations.
The SEC now appears ready to rethink that framework.
Instead of requiring every trade to match the best quote available elsewhere, the agency has proposed a broader best-execution model focused on broker responsibilities.
Under this approach, brokers would need to demonstrate that their overall execution policies serve clients’ interests without necessarily guaranteeing NBBO compliance on every individual transaction.
The shift may sound technical, but its implications are enormous.
It effectively removes a structural incompatibility that has limited the development of blockchain-based stock markets.
The proposal is currently subject to a 60-day public consultation period before regulators decide whether to proceed with a final rule.
The timing is significant.
Tokenization has emerged as one of the fastest-growing sectors in digital finance.
The process involves representing traditional assets such as stocks, bonds and funds as blockchain-based tokens that can be traded digitally.
Supporters argue tokenization can reduce settlement times, lower costs, increase market access and support around-the-clock trading.
Major financial institutions including Citigroup, JPMorgan, BlackRock, Franklin Templeton and the Depository Trust & Clearing Corporation have all invested heavily in tokenization initiatives.
Many analysts now view tokenization as blockchain technology’s most commercially important use case beyond cryptocurrencies.
The SEC proposal could accelerate a convergence between decentralized finance and traditional capital markets.
Platforms such as Robinhood, Kraken and several emerging financial technology firms have been exploring tokenized stock products for years.
Regulatory uncertainty has remained one of the biggest obstacles.
Without a workable legal framework, tokenized equities risked existing in a gray area between securities regulation and blockchain innovation.
Removing Rule 611 would not automatically create a tokenized stock market.
However, it could eliminate one of the largest legal hurdles preventing that market from developing.
Industry observers increasingly believe the next generation of financial infrastructure will blend traditional securities with blockchain-based settlement systems.
The United States is not acting in isolation.
Regulators worldwide are racing to establish frameworks for tokenized assets.
Japan recently moved toward treating tokenized stocks as securities under existing financial laws.
Hong Kong, Singapore and the European Union have also advanced policies supporting digital asset innovation.
The growing competition has increased pressure on US regulators to modernize market rules originally designed long before blockchain technology existed.
Failure to adapt could risk pushing financial innovation toward more accommodating jurisdictions.
The proposal arrives amid explosive growth in the real-world asset sector.
Tokenized treasuries, money market funds, private credit products and equities have collectively attracted billions of dollars in capital over the past year.
Investors increasingly view blockchain infrastructure as a way to modernize financial markets rather than replace them.
Tokenized equities represent one of the most anticipated segments because they offer direct exposure to traditional assets while benefiting from blockchain efficiency.
Many industry forecasts suggest tokenized assets could eventually represent trillions of dollars in value.
The SEC’s proposal remains subject to review and public feedback.
Analysts expect the rulemaking process to continue through late 2026 before a final vote potentially occurs in early 2027.
If adopted, the changes could pave the way for broader experimentation with blockchain-based securities trading.
Market participants will also be watching whether regulators introduce additional exemptions and guidance for tokenized assets.
Those decisions could determine how quickly tokenized stock markets evolve from niche products into mainstream financial infrastructure.
The SEC’s proposal to repeal Rule 611 may appear technical, but its impact could extend far beyond traditional stock trading. By removing a key obstacle that has constrained decentralized trading systems, regulators may be opening the door for tokenized US equities to operate at scale on blockchain networks. If the proposal becomes law, it could become one of the most important regulatory developments in the evolution of tokenized finance and the future convergence of Wall Street and decentralized markets.
Regulation NMS was introduced in 2005 to modernize US equity markets and ensure investors received the best available prices when trading stocks. Rule 611 became a central component of that framework by enforcing the National Best Bid and Offer system across exchanges. However, decentralized finance platforms developed years later using automated market maker technology that does not naturally fit within the rule’s structure. As tokenization gained momentum, industry participants increasingly argued that the regulation unintentionally prevented blockchain-based securities markets from developing. The SEC’s proposal forms part of a broader modernization effort known as Project Crypto, launched in 2025 to adapt financial regulations for digital asset technologies and emerging blockchain-based markets.
