What happened
The U.S. Securities and Exchange Commission (SEC) has formally proposed the rescission of Rule 611 of Regulation NMS (National Market System). Known as the "trade-through rule," this regulation has governed Wall Street for two decades, requiring trading venues to ensure that stock trades are not executed at prices inferior to the best-protected quotes available. While intended to protect investors in a fragmented market, the rule has increasingly become a bottleneck for modernizing financial infrastructure through blockchain technology.
Technology context
Traditional stock trading involves a complex web of intermediaries, where execution and settlement are decoupled. Currently, it takes one to two business days (T+1 or T+2) for the legal ownership of a stock to actually change hands. This delay is partly due to the compliance requirements of Regulation NMS, which mandates centralized price checking across various exchanges.
Blockchain technology, or Distributed Ledger Technology (DLT), introduces the concept of "atomic settlement." In a blockchain environment, the trade and the transfer of ownership happen simultaneously. Through smart contracts, the ledger verifies that both parties have the necessary assets and executes the swap instantly. Rule 611, designed for an era of manual and centralized electronic matching, is incompatible with the peer-to-peer, instantaneous nature of blockchain ledgers.
Why it matters
This move by the SEC, currently operating under the administration of President Donald Trump, signals a significant shift toward financial deregulation and technological embrace. Its importance lies in several key areas:
- Capital Efficiency: Instant settlement eliminates the need for collateral held during the clearing period, freeing up billions of dollars for reinvestment.
- Asset Tokenization: By removing the legal hurdles of Rule 611, Wall Street can move toward issuing "tokenized" shares. These digital representations of stocks can be traded 24/7 with much lower overhead costs.
- Market Modernization: This proposal acknowledges that the 20-year-old regulatory framework is no longer fit for the digital age, positioning the U.S. to lead in the integration of DeFi (Decentralized Finance) principles into institutional markets.
Key terms explained
- Rule 611 (Trade-Through Rule): A regulation that prevents stock exchanges from bypassing the best available price in the market when executing a trade.
- Atomic Settlement: A blockchain-based process where the transfer of an asset and its payment occur at the exact same time, ensuring no party is left without their assets.
- Regulation NMS: A set of SEC rules aimed at improving the efficiency and fairness of the U.S. equity markets, adopted in 2005.
- DLT (Distributed Ledger Technology): A digital system for recording the transaction of assets in which the transactions and their details are recorded in multiple places at the same time.
Impact
In the short term, the proposal will face intense scrutiny and debate during the public comment period. Traditional clearing houses may lobby against it, as it threatens their current business models. In the medium term, we expect to see the emergence of hybrid trading platforms that combine the liquidity of traditional markets with the speed and transparency of blockchain rails.
What's next
The potential repeal of Rule 611 paves the way for a "Wall Street on-chain." Future trends include the rise of institutional-grade decentralized exchanges (DEXs) and the possibility for retail investors to hold their stock portfolios in self-custody wallets, similar to how they hold Bitcoin or Ethereum today. This marks the beginning of the end for the T+1 settlement cycle, moving toward a T+0 (instant) reality.
Sources
- CryptoSlate
- SEC Division of Trading and Markets official documentation.
Educational analysis generated with AI and editorially reviewed.