After BlackRock's GENIUS-Compliant Stablecoin Fund: How Cayman CIMA-Regulated Structures Can Host Stablecoin Reserves

The launch of BlackRock's restructured money market fund for stablecoin reserves has concentrated industry attention on the onshore US reserve management infrastructure that will support payment stablecoin issuance under the GENIUS Act. The equally important question of how non-US stablecoin issuers, non-bank managers, and issuers serving international customer bases can access reserve and collateral vehicles operating at the same institutional standard has received considerably less attention. Cayman CIMA-regulated fund structures, including mutual funds and segregated portfolios on CV5 Digital SPC, can be configured to serve this role, with the operational discipline that the GENIUS Act has codified as the institutional benchmark for stablecoin reserve management.

"The BlackRock announcement is a structural signal rather than a single product launch. It confirms that reserve management for stablecoins is now institutional infrastructure, governed by serious regulation, serious disclosure, and serious asset discipline. For the part of the global stablecoin market that sits outside the US reserve perimeter, whether by issuer domicile, customer geography, or commercial design, the question becomes which jurisdiction offers an equivalent institutional framework. The Cayman Islands offers it. The CV5 Digital SPC platform operationalises it." David Lloyd, Chief Executive Officer of CV5 Capital

What the GENIUS Act Actually Requires of Reserves

The Guiding and Establishing National Innovation for US Stablecoins Act was signed into law on 18 July 2025. It becomes fully effective on 18 January 2027, or 120 days after final implementing regulations are issued, whichever is sooner. Its reserve and operational provisions are specific, and they establish the institutional standard that will govern US dollar payment stablecoins.

The structural thrust is clear. Payment stablecoin reserves must be high quality, liquid, segregated, independently verified, and operated under a regulatory regime that institutional counterparties can accept without recalibration. BSTBL and the small number of analogous vehicles now being assembled are the onshore expression of that standard.

The Gap the GENIUS Act Does Not Fill

The GENIUS Act governs the issuance of US dollar payment stablecoins in the United States and the conditions under which foreign issuers may offer stablecoins to US customers. It does not, and structurally could not, govern the reserve management requirements of stablecoin issuers operating outside the US regulatory perimeter or serving non-US customer bases. The Treasury is authorised to enter reciprocal comparability arrangements with foreign jurisdictions whose regulatory regimes are determined to be substantially similar, but that process is at an early stage and does not displace the need for non-US issuers to operate within their own home jurisdictional framework.

This creates a well-defined structural gap, and it is the gap that most institutional discussion of stablecoin reserves has so far ignored:

• Stablecoin issuers serving customers predominantly outside the United States, whose reserve arrangements must satisfy the expectations of non-US users, counterparties, and regulators.
• Global issuers managing reserve pools denominated outside the US regulatory perimeter for reasons of tax treatment, commercial strategy, or customer domicile distribution.
• Non-bank managers seeking reserve diversification across regulated jurisdictions to reduce single-country dependency risk, particularly in the light of the regional banking stresses of 2023.
• Onshore issuers planning tokenised reserve structures that may interact with non-US regulatory frameworks, where the underlying regulated fund must be domiciled in a jurisdiction with an established tokenisation framework.

Each of these use cases requires institutional reserve infrastructure that operates at GENIUS-equivalent discipline within a credible alternative regulatory regime. The Cayman Islands is the jurisdiction best positioned to deliver that infrastructure.

The Cayman SPC as a Stablecoin Reserve Vehicle

A CIMA-regulated mutual fund, or a segregated portfolio operated as a compartment within CV5 Digital SPC, can be configured as a stablecoin reserve fund with an investment mandate and operational architecture deliberately designed to mirror GENIUS reserve discipline.

In the operational dimensions that matter for stablecoin reserve management (investment discipline, custody segregation, NAV independence, reserve disclosure, AML controls, and governance integrity) the resulting vehicle is structurally equivalent to a BSTBL-style onshore fund. The regulatory perimeter is different. CIMA, under the Mutual Funds Act or the Private Funds Act, provides the regulatory oversight. The jurisdictional profile of the fund makes it available to issuers whose regulatory, tax, or customer geography circumstances favour an offshore-domiciled structure, and whose onshore US options are limited or unavailable.

Tokenising the Reserve Fund Under the Cayman March 2026 Framework

The legislative package that came into force in the Cayman Islands on 24 March 2026, comprising the Mutual Funds (Amendment) Act 2026, the Private Funds (Amendment) Act 2026, and the Virtual Asset (Service Providers) (Amendment) Act 2026, permits the interests in a CIMA-regulated fund to be represented in tokenised form. The fund remains subject to its full existing regulatory framework. The token is the representation of the interest. The legal register of interests remains the authoritative ownership record. The issuance of tokenised fund interests by a regulated fund is expressly carved out of the definition of virtual asset issuance under the VASP Act.

Applied to the stablecoin reserve fund use case, this framework enables a configuration in which a CIMA-regulated Cayman fund holds the stablecoin reserve assets (Treasuries, overnight repo, institutional bank deposits), calculates NAV daily through an independent administrator, publishes monthly reserve composition reports, and issues tokenised fund interests representing pro rata claims on the underlying reserves.

Under the GENIUS Act's express recognition that reserves may be held in tokenised form, such claims may, subject to Treasury rulemaking on the recognition of tokenised reserves, eventually form part of the reserve composition of an onshore PPSI. For issuers operating entirely outside the US regulatory perimeter, the Cayman framework is already operational and self-contained. The fund tokenisation capability on the CV5 platform provides the implementation pathway within the March 2026 statutory framework.

How the CV5 Digital SPC Platform Complements Onshore GENIUS-Aligned Structures

The CV5 Digital SPC platform is configured to provide the institutional infrastructure that a stablecoin reserve fund requires: independent governance, independent administration, institutional custody, institutional audit, an AML and sanctions framework engineered for digital asset activity, and the reporting and attestation machinery necessary to support monthly disclosures. The platform is not a replacement for onshore GENIUS-compliant vehicles. It is the complementary infrastructure that global stablecoin economies will require as the market scales.

The value proposition is specific and structural. A stablecoin issuer whose commercial footprint sits wholly outside the United States can host reserves in a Cayman SP that operates to the operational standard the US has now codified, without attempting to fit within a regulatory regime designed for a different market. A global issuer managing multi-jurisdiction reserve pools can run a parallel Cayman reserve SP for the portion of reserves that sits outside the US perimeter, with consistent cross-jurisdictional operational discipline. An onshore issuer contemplating tokenised reserve structures can use the Cayman framework as the regulated tokenised fund wrapper, subject to the regulatory clarifications that will determine how onshore PPSIs are permitted to hold tokenised reserve claims under final Treasury rulemaking.

The wider CV5 infrastructure, including the digital asset fund platform, the daily NAV capability, the authority architecture for digital asset fund governance, and the FATCA and CRS compliance framework, provides the operational spine for reserve fund structures of this kind at institutional standard from day one.

Key Takeaways

• BlackRock's October 2025 restructuring of BSTBL confirmed that stablecoin reserve management has become institutional infrastructure governed by explicit statute, disclosure, and asset discipline. The operational standard set by the GENIUS Act is now the benchmark for the category globally, not only in the United States.
• The GENIUS Act governs US dollar payment stablecoin issuance within the US regulatory perimeter. It does not govern reserve arrangements for non-US issuers, global issuers, or reserve structures that operate outside that perimeter by design.
• A CIMA-regulated Cayman mutual fund or a segregated portfolio within CV5 Digital SPC can be configured as a stablecoin reserve fund with an investment mandate, custody arrangement, NAV discipline, reserve reporting cadence, and AML framework that mirror the operational standards applied onshore.
• The Cayman legislative framework that came into force on 24 March 2026 permits tokenised fund interests issued by regulated funds, providing a direct implementation pathway for tokenised reserve claims. The GENIUS Act expressly contemplates reserves held in tokenised form, subject to applicable law and regulation.
• The CV5 Digital SPC platform provides the institutional governance, independent administration, institutional custody, audit, and reserve attestation machinery required to operate a stablecoin reserve fund to onshore-equivalent standards within a Cayman regulatory perimeter.
• The positioning is complementary rather than competing. Onshore GENIUS-aligned vehicles serve US dollar payment stablecoin reserves for US customers. The Cayman framework serves non-US issuers, global distribution reserves, jurisdictional diversification, and tokenised reserve wrappers. Both will be required as the stablecoin market scales toward multi-trillion dollar outstanding supply.