英国FCAが一気に暗号資産の新規制を打ち出す、ステーブルコインの資本規制引き下げの背景にあるシグナル

On June 30, the UK FCA (Financial Conduct Authority) released its landmark final rules for cryptoasset regulation, reducing stablecoin capital requirements to 1% and establishing the first framework against market manipulation and insider trading. This article breaks down the details of the FCA's new regulations and compares them with MiCA, which will be fully implemented on July 1, interpreting the industry impact of the institutionalized compliance era.

Key Takeaways

The UK Financial Conduct Authority (FCA) officially published its final policy statement on cryptoasset regulation on June 30, covering three pillars: prudential capital requirements, market abuse rules, and stablecoin standards.

The capital coefficient (K-SII) for non-systemic stablecoin issuers has been significantly reduced from 2% to 1%, a key concession driven by industry feedback.

The new rules introduce a regulatory framework for insider trading and market manipulation in the crypto industry, benchmarked against traditional finance for the first time.

The application window for authorization will open on September 30, 2026, and close on February 28, 2027; the new regime is expected to take effect on October 25, 2027.

This aligns with the full implementation of the EU's MiCA on July 1, marking the second half of 2026 as the global institutionalization phase for crypto regulation, characterized by "strong compliance and license competition."

Traders and institutional investors should assess their compliance pathways early to capitalize on the market window created by regulatory clarity.

Overview: The Shoe Finally Drops, But This is Just the Beginning

If the biggest anxiety for the UK crypto industry over the past two years stemmed from "uncertainty," that anxiety was partially dispelled on June 30. According to a report from The Block, the FCA published a series of policy statements that day, establishing the prudential capital, market abuse controls, and stablecoin standards required for cryptoasset companies operating in the UK, marking the finalization of several rounds of consultations and discussion papers that have been ongoing since late 2025.

This is not an isolated regulatory action. In the same week, the transition period for the EU's MiCA will also fully end on July 1 – after which cryptoasset service providers without MiCA authorization can no longer rely on transitional arrangements to operate in the EU. The coincidental synchronization of regulatory timelines between the UK and the EU is not accidental, but rather a shared commitment by major global jurisdictions to make the second half of 2026 the watershed moment for the crypto industry's shift from "wild growth" to "licensed operations."

For exchanges, stablecoin issuers, custodians, and market makers, this means that previously uncertain compliance cost calculations now have concrete figures to work with. For ordinary investors, it means that in the future, when trading on regulated platforms, the transparency of assets and the compliance background of issuers will become unavoidable considerations.

Four Key Highlights of the FCA's New Rules

1. Stablecoin Capital Requirements Significantly Simplified: K-SII Coefficient Reduced from 2% to 1%

This is perhaps the most direct "positive" for the industry in these new rules. According to The Block's report, the FCA reduced the K-SII capital coefficient for stablecoin issuance from the previously proposed 2% to 1%. Simultaneously, qualifying cryptoassets on UK Qualifying Crypto Asset Trading Platforms (QCATPs) will uniformly be subject to a 40% net risk position requirement and a 40% counterparty default volatility adjustment, replacing the previously proposed two-tier classification system.

This adjustment is a direct result of industry consultation feedback. Analysis from law firm Skadden noted that the FCA conducted multiple rounds of consultation on the prudential regime from late 2025 to early 2026. The industry broadly reflected that the original two-tier classification was overly complex and capital-intensive, potentially undermining the UK's competitiveness as a jurisdiction for stablecoin issuance. The simplified final version, to some extent, addresses these concerns.

However, simplification does not mean leniency. It's worth noting a detail easily overlooked, as highlighted in legal analysis from Freshfields: UK-qualifying stablecoin issuers will be prohibited from distributing interest income generated from reserve assets to holders. This means that, compared to some offshore stablecoin issuers who can share reserve asset yields with users, UK-issued stablecoins may have a natural competitive disadvantage in product appeal. The regulatory intent is clearly to strictly distinguish stablecoins from fund-type investment products.

2. First Introduction of "Anti-Market Manipulation and Insider Trading" Framework Benchmarked Against Traditional Finance

If the adjustment to capital requirements is about "relieving burdens," then the introduction of market abuse rules is the most significant "ballast stone" in these new regulations. The Block's report explicitly states that the new rules establish a market abuse framework covering insider trading and market manipulation, requiring UK Qualifying Crypto Asset Trading Platforms (QCATP) to conduct due diligence, meet asset admission criteria, and publish qualifying disclosure documents for assets approved for trading. The FCA also removed the previous exemption that allowed fungible cryptoassets to be listed without a disclosure document.

The design philosophy of these rules is not created from scratch but heavily draws upon the Market Abuse Regulation (MAR) system that has operated in UK traditional financial markets for years. Analysis from Latham & Watkins points out that the relevant statutory instruments have already provided the legislative framework for the cryptoasset market abuse regime, which will be further detailed by FCA-specific rules. The overall design remains largely consistent with the existing traditional financial market abuse framework.

Specifically, regulatory requirements mandate that operators of large trading platforms bear the responsibility for cross-platform monitoring and reporting suspicious market abuse activities. Detailed requirements are also set for insider information disclosure and intermediary notification obligations. In other words, the gray operational models of the past – such as project teams creating hype in groups or insiders trading on advance knowledge – will face substantial compliance and legal risks on regulated UK platforms.

3. Authorization Timeline Set: Application Window Opens September 30, 2026; Effective Date October 25, 2027

After the regulatory details are finalized, the most closely watched aspect is the specific timeline. According to a report by cryptoadventure, the authorization application window will open on September 30, 2026, and close on February 28, 2027. The new regime is expected to take effect on October 25, 2027. The FCA has also clearly stated that entities currently registered under the Money Laundering Regulations (MLRs) will not automatically have their authorization status transferred under the new regime. All companies conducting cryptoasset activities within the scope of the new framework must apply for FCA authorization anew.

To help companies prepare in advance, the FCA's official website also mentions that the regulator will offer pre-application support meetings starting in July to help companies prepare their authorization application materials. This provides the industry with an approximately 15-month window to build internal compliance systems. However, for smaller and medium-sized projects, this period may not be ample, as the authorization threshold involves a comprehensive overhaul of multiple dimensions including capital adequacy, market abuse monitoring systems, and client asset segregation.

4. Broad Regulatory Scope, DeFi Remains in a Gray Area

The scope of the new rules is quite extensive. cryptoadventure's report notes that the framework brings exchanges, wallets, custodians, staking services, and qualifying stablecoin issuers all under a comprehensive authorization regime, covering multiple layers including mandatory licensing, custody standards, market abuse protection, disclosure rules, and prudential requirements.

However, it is worth noting that, as Latham's analysis also mentions, decentralized finance (DeFi) is currently excluded from the new regime's regulatory scope. The FCA will subsequently issue specific guidance to define what constitutes "genuine decentralization." This means that for purely on-chain protocols, some flexibility outside the compliance framework might persist in the short term. However, as the regulatory criteria for identifying "identifiable controlling entities" become clearer, this gray area is expected to be gradually compressed.

Comparison with MiCA: UK and EU Regulatory Rhythms are Synchronizing

Looking across the English Channel, the full implementation milestone for the EU's MiCA coincides almost perfectly with the FCA's new rules. Analysis from Hacken indicates that the MiCA transition period within the EU will end on July 1, 2026. After this date, any entity without MiCA authorization can no longer rely on transitional arrangements to provide cryptoasset services within the EU.

The two regulatory systems share highly similar core logic, but there are significant differences in specific implementation details:

At the capital requirement level, a comparative analysis by Cyfrin previously noted that, compared to similar rules in the US and UK, MiCA's standards for prudential and asset custody are more stringent. This is one reason some issuers are considering shifting to more flexible jurisdictions. By reducing the stablecoin capital coefficient to 1%, the FCA is, in a way, seeking a balance between "strict regulation" and "maintaining competitiveness."

At the market structure level, an analysis piece from KuCoin offers a striking prediction: industry sources estimate that up to 80% of crypto exchanges currently operating in the EU may fail to obtain a MiCA license before July 1, ultimately being forced to exit the EU market. Although this judgment is debated, it reflects the fact that the threshold for full compliance is much higher than it appears. It involves not only significant capital investment but also requires companies to undertake structural changes such as establishing local entities, upgrading AML/KYC systems, and implementing the travel rule.

At the stablecoin reserve level, there are also considerable disagreements between the two systems. According to research from SpotedCrypto, MiCA requires "systemically important" stablecoin issuers to hold approximately 60% of their reserve assets in credit institutions located within the EU. In contrast, the US GENIUS Act does not mandate a minimum floor for bank deposit ratios. These structural differences in reserve requirements force global stablecoin issuers like Circle to maintain separate reserve pools for different jurisdictions, implicitly increasing operational costs.

Overall, while the UK's FCA and the EU's MiCA have different emphases in specific clauses, the direction they convey is highly consistent: starting from the second half of 2026, "holding a license to operate" will become a hard requirement for the crypto industry to establish itself in major developed markets. Business models relying solely on gray-area arbitrage are being systematically squeezed.

What This Means for Traders and Institutional Investors

For ordinary traders, regulatory clarity often brings changes on two fronts. On one hand, the review standards for assets listed on regulated platforms will become stricter, compressing the survival space for poorly-vetted tokens lacking fundamental support and relying purely on marketing hype. On the other hand, the introduction of rules against market manipulation and insider trading should, in theory, help improve the fairness of market pricing, reducing the likelihood of retail investors suffering losses due to information asymmetry.

For institutional investors and large capital holders, a clear regulatory framework is actually a positive signal. It means funds can be deployed more confidently into compliant assets within regulated markets, without the fear of compliance risks stemming from sudden policy changes. Historical experience shows that the window period following the implementation of every major regulatory framework is often a stage where high-quality compliant assets regain a valuation premium.

If you are monitoring the market opportunities stemming from this round of regulatory change, now may be an opportune time to reorganize your trading strategy and choose compliant and reliable platforms.

Against the backdrop of increasing regulation, choosing a trading platform that has long prioritized compliance building and offers a wide range of products becomes particularly important. Whether you focus on stable allocation in mainstream assets or hope to position in sectors that might benefit from regulated trends, MEXC provides a relatively complete spot and derivatives trading system, allowing users to flexibly adjust their position strategies amidst changing regulatory environments.

Exclusive Insights from the MEXC Crypto Pulse Research Team

Our team believes that the temporal overlap between the FCA's new rules and the conclusion of the MiCA transition period is not a simple coincidence. It reflects that the attitude of major global regulators towards the crypto industry has shifted from "observation and experimentation" to "systematic integration into the financial regulatory framework." Two noteworthy details merit particular attention from industry participants:

First, the FCA's simultaneous reduction of the stablecoin capital coefficient from 2% to 1% and its prohibition of UK stablecoin issuers from sharing reserve yields represent a "one loosen, one tighten" strategy. This essentially controls industry entry costs while preventing stablecoins from evolving into disguised wealth management products. We believe this regulatory approach is likely to be emulated by other jurisdictions in the future, especially against the backdrop of increasingly blurred boundaries between stablecoins and money market funds.

Second, the introduction of market abuse rules means that the "information transparency premium" in the crypto asset market will gradually become apparent. Projects and trading platforms that proactively establish compliant disclosure mechanisms and cooperate with regulatory requirements are more likely to attract institutional capital in the long run. Conversely, projects that profit from information asymmetry will see their survival space continually compressed. We recommend that traders during this regulatory transition period prioritize asset fundamentals and the compliance background of platforms over short-term speculative hype.

Frequently Asked Questions

Q: When will the UK FCA's new rules officially take effect?

A: According to the official timeline, the authorization application window will open on September 30, 2026, and close on February 28, 2027. The new regulatory regime is expected to take effect on October 25, 2027. The current publication is the final policy statement, giving companies approximately a 15-month window to complete compliance preparations.

Q: By how much are the stablecoin capital requirements specifically reduced?

A: The K-SII capital coefficient for non-systemic stablecoin issuance has been reduced from the previously proposed 2% to 1%. Additionally, qualifying cryptoassets on trading platforms uniformly face a 40% net risk position requirement and a 40% counterparty default volatility adjustment.

Q: What is the difference between the FCA's new rules and the EU's MiCA?

A: Both have a similar core objective but differ in implementation details. MiCA has stricter bank deposit ratio requirements for stablecoin reserve assets (approximately 60% held in EU credit institutions), and its overall prudential and asset custody standards are considered more stringent than comparable US and UK rules. The FCA adopts a relatively simplified capital coefficient system but similarly prohibits stablecoin issuers from distributing interest income to holders.

Q: Do these new rules cover DeFi protocols?

A: Currently, DeFi remains excluded from the scope of the new regime. The FCA will subsequently issue specific guidance to clarify what constitutes "genuine decentralization" to define the regulatory boundary.

Q: How should ordinary investors respond to this wave of regulatory changes?

A: It is recommended to prioritize trading platforms with a long-term focus on compliance building and information transparency. Pay attention to asset fundamentals rather than short-term hype, and closely monitor the authorization progress of various jurisdictions to adjust asset allocation