Developing tonight: the United States Securities and Exchange Commission has approved a groundbreaking framework for real-time settlement of institutional digital asset transactions. The decision, announced minutes ago, marks a seismic shift in the regulation of cryptocurrencies, effectively granting legitimacy to a system that allows trades to settle instantly rather than over the standard two-day period.

The SEC’s vote was 3-2, with Republican commissioners favouring the move and Democrats opposing. Gary Gensler, the SEC chair, said in a statement that the approval "reflects a careful balance between innovation and investor protection." He stressed that the new rules apply only to institutional investors, defined as entities with at least $50 million in assets under management. Retail investors are not affected.

Sources close to the matter say the decision was driven by pressure from major Wall Street banks and asset managers who have long argued that the current T+2 settlement cycle is inefficient for digital assets, exposing parties to counterparty risk and price volatility. Under the new system, known as "Continuous Linked Settlement" for digital assets, transactions will be settled atomically: the transfer of digital assets and payment occur simultaneously, eliminating the risk that one party defaults.

The SEC’s approval is conditional. Firms must meet strict capital requirements and maintain real-time surveillance systems to detect market manipulation. The agency has also mandated that all settlement activity be recorded on a permissioned blockchain, not a public one, to ensure compliance with anti-money laundering laws.

Leaked documents obtained by The British Wire reveal that the SEC consulted with the Bank of England and the Financial Conduct Authority before making its decision. Whitehall sources confirm that UK regulators are closely monitoring the development, with a view to introducing similar measures within the next six months.

Industry reaction has been swift. Brian Brooks, the former acting Comptroller of the Currency and now CEO of BitFury, called it "the most important regulatory development in crypto since the launch of Bitcoin." He told our correspondent: "This changes everything. Real-time settlement is the holy grail for institutional adoption. It reduces risk, lowers costs, and opens the door for trillions of dollars in mainstream capital."

But critics warn of unintended consequences. Senator Elizabeth Warren, a long-time crypto sceptic, issued a statement saying the SEC had "opened the floodgates to a casino-like system that could destabilise our financial markets." Consumer advocacy groups have also voiced concern, arguing that the speed of settlement could increase the risk of flash crashes and make it harder to reverse fraudulent transactions.

The decision took effect immediately, but full implementation is expected to take up to twelve months. The SEC has granted a temporary exemption for existing settlement systems, allowing them to phase in the new requirements gradually.

Market reaction has been muted so far, with Bitcoin trading flat at $67,500. Analysts say this reflects uncertainty about the practical impact. "The devil is in the detail," said Carol Alexander, professor of finance at the University of Sussex. "Real-time settlement on a permissioned blockchain is not the same as decentralised crypto. It's more like a central bank digital currency for institutional use. The question is whether it will satisfy the crypto industry's demand for true decentralisation."

The announcement comes amid a broader push by the Biden administration to regulate digital assets. Earlier this week, the Treasury Department proposed new rules requiring crypto exchanges to report transactions over $10,000 to the Internal Revenue Service. The SEC’s move is seen as an olive branch to an industry that has felt under siege.

For London, the stakes are high. The UK has positioned itself as a global hub for crypto innovation, and the FCA is expected to unveil its own digital asset settlement regime next spring. If the US experiment succeeds, it could set a global standard. If it fails, the reputational damage could be severe.

Our analysis suggests that the real test will come when the first major default occurs. Real-time settlement does not eliminate credit risk entirely; it merely shifts it. In the event of a sudden market crash, the speed of settlement could amplify losses, creating a cascade of simultaneous defaults that a central counterparty would struggle to manage.

For now, the crypto industry is celebrating. But as one veteran trader told us: "This is not the end of the beginning. It is the beginning of the beginning."