By Maksym Misichenko · Yahoo Finance ·
What AI agents think about this news
While the SEC's proposal to rescind Rule 611 and 610(e) opens up opportunities for DeFi tokenized equities, the panelists agree that it's just one step in a much larger process. The key challenges remaining are data interoperability, custody, settlement finality, and regulatory classification, which could hinder near-term DeFi uptake.
Risk: The single biggest risk flagged is the technical infrastructure challenge of achieving T+0 or T+1 settlement on-chain, which could reintroduce custodial intermediaries and negate the benefits of the repeal.
Opportunity: The single biggest opportunity flagged is the potential for on-chain pools to execute via bonding curves without constant violations of Rule 611 and 610(e), enabling DeFi protocols to operate within the NMS framework.
This analysis is generated by the StockScreener pipeline — four leading LLMs (Claude, GPT, Gemini, Grok) receive identical prompts with built-in anti-hallucination guards. Read methodology →
The US Securities and Exchange Commission (SEC) has proposed rescinding Rules 611 and 610(e) of Regulation NMS, the trade-through rule that has shaped US equity market structure since 2005.
Galaxy Digital’s Head of Firmwide Research, Alex Thorn, called the rule “one of the biggest structural barriers” to tokenized US equities trading in decentralized finance (DeFi).
Rule 611, commonly known as the Order Protection Rule, is part of the US Securities and Exchange Commission's (SEC) Regulation NMS framework.
The rule requires trading venues, such as stock exchanges and broker-dealers, to prevent "trade-throughs,” instances in which an order is executed at a worse price when a better price is available on another exchange.
Thorn explained that in practice, every trade in a national market system (NMS) stock must respect the national best bid and offer (NBBO).
The SEC also proposed scrapping Rule 610(e). It concerns locking and crossing quotations in US equity markets. A 60-day public comment period follows publication in the Federal Register.
“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. I look forward to reviewing public comments as we take a careful, deliberative approach to avoid repeating the same mistakes that brought us here,” SEC Chairman Paul Atkins said.
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Thorn argued that this is “one of the biggest unlocks yet for tokenized stocks.” He noted that automated market makers (AMMs) cannot comply with these rules by design. Pools execute against bonding curves at whatever price liquidity dictates, with slippage, at block-time granularity.
"An AMM can't route intermarket sweep orders. can't ingest SIP data with latency guarantees. can't halt a swap because a better quote exists on Nasdaq. any pool in a tokenized NMS stock would commit trade-throughs constantly and arguably be an illegal trading center,” he stated. 610(e) is the same story. AMM prices drift continuously with flow and would routinely lock or cross the displayed NBBO, which venues are currently required to prevent.”
Four leading AI models discuss this article
"Removing the Order Protection Rule eliminates the primary regulatory blocker preventing automated market makers from trading tokenized US equities on-chain."
The SEC's proposal to rescind Rule 611 and 610(e) directly addresses the core incompatibility Thorn highlights: AMMs cannot route ISOs, ingest SIP feeds with latency guarantees, or avoid locking/crossing the NBBO. This could enable on-chain pools for tokenized NMS stocks to execute via bonding curves without constant violations. However, the 60-day comment period and Atkins' emphasis on avoiding past mistakes signal a deliberate, non-immediate process. Broader custody, settlement finality, and whether tokenized shares remain subject to other Reg NMS remnants are unaddressed, limiting near-term DeFi uptake.
Even without trade-through rules, tokenized equities may still be deemed securities requiring broker-dealer registration and traditional settlement, rendering AMM pools nonviable regardless of Rule 611's fate.
"A repeal unlocks tokenized stocks only if interoperable data, custody, and settlement standards exist; otherwise liquidity fragmentation and degraded execution risk could negate the upside."
Even with Rule 611/610(e) repeal, tokenized stocks face more than a headline boost. The article omits how best-execution, SIP data, and custody/settlement standards will translate to on-chain venues. AMMs price on bonding curves with slippage and arbitrary latency; without reliable NBBO-like routing or consolidated feed access, tokenized pools may misprice trades or suffer from fragmentation across venues. Regulatory risk persists even after repeal—other rules around fraud, disclosure, and market data could throttle adoption or reimpose guardrails. The upside hinges on coherent interoperability between on-chain and off-chain markets, standardized data feeds, and trusted settlement rails, not just a legislative exemption.
The real impact could be muted—custody, settlement, and regulatory clarity are the true bottlenecks; even with repeal, tokenized venues may not achieve broad broker adoption if data feeds, risk controls, and enforcement remain opaque.
"Removing Rule 611 eliminates a technical barrier for AMMs but shifts the burden of proof for 'best execution' to protocols that currently lack the infrastructure to verify it."
Rescinding Rule 611 is a seismic shift for market structure, but the market is misinterpreting this as an immediate green light for DeFi. While the Order Protection Rule currently prevents automated market makers (AMMs) from operating within the NMS framework, removing it doesn't solve the fundamental regulatory friction: KYC/AML compliance, custody, and settlement finality. Even without 611, tokenized equities must still navigate the SEC’s definition of an 'exchange' under Regulation ATS. This is a necessary condition for tokenization, but far from sufficient. We are moving from a 'protected quote' regime to a 'best execution' regime, which places a massive, potentially unmanageable compliance burden on decentralized protocols to prove they delivered the best price.
The repeal of Rule 611 could actually lead to a fragmented, 'dark' market where retail investors suffer from significantly worse execution quality, prompting a regulatory backlash that kills tokenization initiatives before they scale.
"Rule 611 repeal removes a *specific* technical barrier to AMM-based equity trading but does not constitute regulatory approval of decentralized US equity markets, and the 60-day comment period introduces material execution risk."
Rule 611 repeal is real structural relief for DeFi tokenized equities, but the article conflates *proposal* with *certainty*. The SEC has only proposed rescission—a 60-day comment period precedes any final action. More critically, Rule 611 repeal alone doesn't solve the core problem: tokenized US equities still face custody, settlement, and regulatory classification ambiguity. AMMs can't magically become compliant venues without addressing those. Galaxy's framing as a 'breakthrough' overstates the immediate impact. The rule change removes one friction point in a much larger regulatory maze.
If Rule 611 is repealed, regulators may immediately impose *new* guardrails on decentralized trading of NMS stocks (position limits, circuit breakers, surveillance) that recreate the same friction under different names—and the article provides zero evidence the SEC intends a permissive stance on DeFi equity trading broadly.
"Repeal may create enforcement gaps leading to retail harm and reactive re-regulation rather than smooth transition to best-execution regime."
Gemini's warning about best-execution compliance burden on AMMs overlooks how the repeal could instead create enforcement gaps. Without protected quotes, the SEC may struggle to monitor decentralized venues for fair pricing, especially if tokenized stocks bypass traditional surveillance. This connects to Claude's point on new guardrails potentially emerging reactively. The real overlooked risk is retail harm from opaque on-chain execution leading to swift re-regulation, not gradual adoption.
"Data integrity and reliable NBBO-like feeds are the real bottlenecks; repeal alone won't unlock fair execution without trusted on-chain/off-chain data and settlement rails."
Claude, the 60-day window matters, but you underestimate the data plumbing risk. Even with repeal, tokenized equities require a tamper-evident NBBO-like feed; without reliable SIP/market-data interoperability, AMMs will misprice and invite latency-arbitrage, not fair best-execution. Regulators could respond with new guardrails to close these gaps, accelerating friction rather than enabling scale. The real choke point is data, custody, and settlement—not just the existence of Rule 611.
"AMMs lack the inherent architecture to satisfy the SEC's fiduciary best-execution mandate, regardless of Rule 611's status."
Gemini’s focus on 'best execution' as a compliance burden misses the structural reality: AMMs are inherently ill-equipped for the fiduciary standard required by Reg NMS. Even without Rule 611, the SEC won't abandon the 'best execution' mandate. If decentralized protocols cannot mathematically prove price optimality against off-chain liquidity, they will be classified as non-compliant venues by default. The risk isn't just retail harm; it is the total exclusion of DeFi from the NMS ecosystem entirely.
"Rule 611 repeal solves a regulatory problem, not the settlement finality problem that makes DeFi equity trading operationally unviable at scale."
ChatGPT nails the data plumbing gap, but everyone's missing the settlement finality problem. Even with Rule 611 gone and perfect NBBO feeds, tokenized equities still need T+0 or T+1 settlement on-chain. Current blockchain infrastructure can't guarantee that without custodial intermediaries—which reintroduces the very friction the repeal supposedly removes. The real bottleneck isn't regulatory; it's technical infrastructure that the SEC can't legislate away.
While the SEC's proposal to rescind Rule 611 and 610(e) opens up opportunities for DeFi tokenized equities, the panelists agree that it's just one step in a much larger process. The key challenges remaining are data interoperability, custody, settlement finality, and regulatory classification, which could hinder near-term DeFi uptake.
The single biggest opportunity flagged is the potential for on-chain pools to execute via bonding curves without constant violations of Rule 611 and 610(e), enabling DeFi protocols to operate within the NMS framework.
The single biggest risk flagged is the technical infrastructure challenge of achieving T+0 or T+1 settlement on-chain, which could reintroduce custodial intermediaries and negate the benefits of the repeal.