ECB Wholesale CBDC and Fund Settlement Trials

ECB Wholesale CBDC Trials for Fund Settlement

The European Central Bank initiated its wholesale CBDC exploratory phase in May 2024, conducting trials with over 60 financial institutions across multiple use cases including bond settlement, foreign exchange, and — critically for tokenized fund products — fund share creation, redemption, and secondary market settlement. These trials explore whether central bank digital currency can serve as the settlement asset for tokenized financial instruments, replacing commercial bank money and potentially eliminating settlement risk for tokenized ETF transactions.

Trial Structure and Fund-Specific Use Cases

The ECB’s exploratory phase encompasses three technical approaches: full DLT (settlement entirely on distributed ledgers); interoperability (connecting existing systems with DLT platforms); and the Eurosystem’s own trigger solution (connecting DLT platforms to TARGET2/T2S for cash settlement in central bank money).

Fund-specific trials have focused on:

UCITS creation and redemption settlement: Simulating the cash leg of fund creation/redemption transactions using wholesale CBDC, enabling atomic delivery-versus-payment where fund shares and cash settle simultaneously on DLT. Participants include BNP Paribas, Societe Generale, and Deutsche Borse’s Clearstream.

Money market fund transactions: Testing real-time settlement of tokenized money market fund purchases and redemptions using wholesale CBDC, eliminating the T+1 settlement delay that currently characterizes fund transactions.

Cross-border fund distribution: Exploring multi-currency settlement for cross-border fund transactions, where investors purchase fund shares denominated in one currency using wholesale CBDC denominated in another.

Implications for Tokenized ETF Settlement

Wholesale CBDC settlement for tokenized ETFs would address several structural inefficiencies in current ETF operations:

Settlement risk elimination: Current ETF creation and redemption involves settlement risk — the risk that one party delivers its obligations while the other defaults. Atomic settlement using wholesale CBDC eliminates this risk by ensuring simultaneous delivery of fund shares and cash.

Authorized participant capital efficiency: Authorized participants currently commit capital during the settlement cycle, as they deliver baskets of securities before receiving ETF shares (or vice versa). Atomic settlement reduces capital requirements by compressing the settlement cycle to near-instantaneous execution.

24/7 settlement capability: Wholesale CBDC on DLT infrastructure could operate continuously, unlike TARGET2’s business-hours-only schedule. This would enable tokenized ETF settlement outside traditional market hours — particularly valuable for ETFs tracking global indices across multiple time zones.

Coordination with EU Regulatory Framework

The ECB’s wholesale CBDC trials operate within the regulatory framework established by MiCA, the DLT Pilot Regime, and ESMA technical standards. The Eurosystem’s trigger solution — which connects DLT platforms to existing central bank infrastructure — is designed to complement rather than replace the regulatory requirements for tokenized fund operations.

The ECB’s eventual decision on whether to issue a wholesale CBDC (separate from the retail digital euro project) will depend on the outcomes of these trials and on a legislative proposal from the European Commission. No formal legislative proposal for wholesale CBDC has been published as of March 2026, though the Commission has indicated that a proposal could come in 2027 following the trial results assessment.

For tokenized ETF sponsors, wholesale CBDC represents a potential settlement infrastructure upgrade that would reduce costs, eliminate settlement risk, and enable operational efficiencies. However, the technology’s availability depends on ECB decisions and European legislative processes with multi-year timelines.

The comparison between wholesale CBDC and stablecoin settlement for tokenized fund products examines the trade-offs between central bank money and private stablecoin settlement for tokenized ETF operations.

Participating Financial Institutions and Trial Results

The ECB’s exploratory phase has engaged over 60 financial institutions across the eurozone, representing the full spectrum of European fund market participants:

Central securities depositories: Euroclear and Clearstream (Deutsche Borse Group) have both participated in wholesale CBDC settlement trials, testing integration between their existing settlement infrastructure and DLT-based CBDC payment rails. Euroclear’s D-FMI platform has demonstrated delivery-versus-payment settlement of tokenized bonds against wholesale CBDC, achieving atomic settlement in under 30 seconds — compared to the standard T+2 settlement cycle for traditional European securities.

Commercial banks: BNP Paribas, Societe Generale (through SG-FORGE), Deutsche Bank, Commerzbank, and Intesa Sanpaolo have participated in CBDC settlement trials. These banks have tested wholesale CBDC settlement for tokenized bonds, structured products, and — in specific trial workstreams — fund share transactions.

Fund managers and administrators: Several European asset managers have participated in trials testing CBDC settlement for fund creation and redemption. The trials simulated creation unit transactions where authorized participants deliver tokenized basket securities and receive tokenized fund shares, with the cash component settling in wholesale CBDC rather than commercial bank deposits.

DLT infrastructure providers: SDX, Fnality International, and SETL have provided DLT platforms for the trials, testing interoperability between different blockchain networks and the ECB’s settlement infrastructure.

Technical Architecture: Three Settlement Approaches

The ECB’s three technical approaches represent different visions for how wholesale CBDC could integrate with tokenized fund settlement:

Full DLT approach: Both the securities leg and the cash leg settle on a single DLT platform. Wholesale CBDC is represented as a token on the same blockchain as the tokenized fund shares, enabling atomic settlement through a single smart contract transaction. This approach offers maximum efficiency (single-chain settlement) but requires central bank money to exist as a blockchain token — a significant architectural decision that the ECB has not committed to permanently.

Interoperability approach: The securities leg settles on a DLT platform while the cash leg settles through existing central bank infrastructure (TARGET2/T2S), with interoperability protocols ensuring synchronization between the two legs. This approach preserves the existing central bank payment infrastructure while adding DLT capabilities for the securities leg. For tokenized fund products, this means fund shares settle on-chain while cash settles through TARGET2 — a hybrid architecture that leverages existing regulatory comfort with central bank payment systems.

Trigger solution: The Eurosystem’s trigger solution connects DLT platforms to TARGET2 through an automated trigger mechanism: when the DLT platform confirms that a tokenized securities transaction is ready for settlement, it triggers a corresponding cash payment through TARGET2. The trigger solution has been developed by the Deutsche Bundesbank and tested with multiple DLT platforms.

For tokenized ETF settlement, the trigger solution is particularly relevant because it enables on-chain NAV calculation and creation-redemption transactions to trigger settlement through the existing eurozone payment infrastructure — maintaining regulatory compliance while adding DLT efficiency.

Relationship to the Digital Euro Retail Project

The ECB’s wholesale CBDC exploratory phase is separate from the digital euro retail project, which the ECB has been developing since October 2021. The retail digital euro targets person-to-person and person-to-merchant payments, while wholesale CBDC targets interbank and securities settlement. For tokenized fund products, wholesale CBDC is the relevant initiative — retail investors would not typically settle fund transactions in CBDC directly.

However, the two projects share underlying design decisions: the choice of DLT platform, privacy architecture, programmability features, and legal framework. If the ECB decides to proceed with both retail and wholesale digital euro issuance, the combined infrastructure could enable end-to-end tokenized fund operations — from retail investor purchase (using digital euro) through fund creation (using wholesale CBDC for the AP transaction) to portfolio settlement (using wholesale CBDC for underlying asset transactions).

Comparison with Global CBDC Initiatives for Fund Settlement

The ECB’s wholesale CBDC trials represent the most advanced central bank initiative specifically targeting fund settlement, but they operate alongside similar programs globally:

Hong Kong mBridge: The HKMA’s participation in Project mBridge tests cross-border CBDC settlement for tokenized assets, including fund shares distributed across Asia-Pacific markets. The mBridge initiative has achieved production-ready transaction processing for cross-border payment settlement. The Hong Kong SFC’s tokenized fund framework — which enabled the ChinaAMC HKD Digital Money Market Fund to become APAC’s first retail tokenized fund (launched February 28, 2025, now $546.1 million AUM) — could leverage mBridge for cross-border fund settlement.

Singapore Project Ubin+ and Project Guardian: MAS’s Project Guardian has enrolled 40+ financial institutions — including Ant Group, Apollo, DBS, Franklin Templeton, Hamilton Lane, OCBC, UBS, JPMorgan, and Standard Chartered — in tokenized fund and bond trials. In 2026, MAS plans a CBDC pilot settling tokenized government bills using wholesale CBDC with DBS, JPMorgan, and Standard Chartered. IMAS (Singapore) and the UK Investment Association joined Project Guardian in August 2025 as the first asset management industry groups to participate.

Brazil Drex: The Central Bank of Brazil’s Drex platform has tested tokenized fund settlement as a priority use case, with Phase 2 pilots involving major Brazilian financial institutions.

Switzerland: The Swiss National Bank has conducted CBDC trials on SIX Digital Exchange (SDX), testing wholesale CBDC settlement for tokenized bonds. These trials could extend to tokenized fund products listed on SDX.

The ECB’s advantage over these competing initiatives is scale: the eurozone’s fund market manages EUR 21 trillion in assets, and wholesale CBDC settlement of even a fraction of this market would represent the largest institutional deployment of central bank digital currency globally. For context, Broadridge’s Distributed Ledger Repo (DLR) platform already processes $385 billion in average daily repo transactions, and JPMorgan’s Kinexys platform has processed $2 trillion in total DLT-based transactions — demonstrating that institutional-scale settlement on distributed ledgers is operationally proven.

Eurosystem Interoperability and Multi-Platform Settlement

The ECB’s exploratory phase has tested settlement across multiple DLT platforms, addressing a critical infrastructure question: how wholesale CBDC settlement can function across the heterogeneous DLT landscape where tokenized fund products are deployed on different blockchain networks (Ethereum, Polygon, Canton Network, and proprietary platforms).

The interoperability trials have demonstrated three connectivity models for cross-platform fund settlement. First, hash time-locked contracts (HTLCs) enable atomic cross-chain settlement where the fund share delivery on one DLT platform is cryptographically linked to the CBDC payment on another, ensuring either both legs settle or neither does. Second, relay-based interoperability uses trusted relay nodes operated by Eurosystem participants to bridge settlement instructions between platforms. Third, the ECB’s trigger solution itself serves as a universal connector, enabling any DLT platform to settle against central bank money through TARGET2 without requiring direct platform-to-platform interoperability.

For fund sponsors operating tokenized products on multiple blockchain networks — as BlackRock’s BUIDL does across Ethereum, Polygon, Arbitrum, Optimism, and Avalanche — the ECB’s multi-platform settlement capabilities ensure that wholesale CBDC settlement is not restricted to a single DLT ecosystem. This platform neutrality is essential for the scalability of CBDC-based fund settlement in the eurozone’s diverse DLT landscape.

Timeline and Decision Framework

The ECB’s decision on whether to proceed from exploratory phase to production wholesale CBDC issuance depends on several factors:

1. Trial outcomes: The Governing Council will evaluate the technical performance, operational reliability, and financial stability implications of the trials conducted through 2025-2026.
2. Legislative authority: The European Commission must propose legislation authorizing wholesale CBDC issuance. No formal legislative proposal has been published, though Commission staff have indicated that a proposal could come in 2027.
3. Political consensus: The European Parliament and Council must agree on the legislative framework, a process that typically takes 18-24 months.
4. Implementation timeline: From legislative adoption to production deployment, an additional 12-18 months would be required for ECB infrastructure development and market participant readiness.

5. Market participant readiness: Fund managers, authorized participants, custodians, and transfer agents must develop DLT integration capabilities to interact with wholesale CBDC infrastructure. The current exploratory phase provides these participants with operational experience, but production readiness requires investment in permanent infrastructure rather than pilot-phase workarounds.

6. Financial stability assessment: The Governing Council must assess whether wholesale CBDC issuance could create financial stability risks, including potential bank disintermediation (where deposits migrate to CBDC), liquidity fragmentation across settlement systems, and concentration risk in DLT infrastructure providers.

This timeline suggests that production wholesale CBDC settlement for tokenized fund products is unlikely before 2029-2030 in the eurozone. In the interim, tokenized fund products will continue to settle using regulated stablecoins (EURC), tokenized bank deposits, or hybrid arrangements connecting DLT platforms to existing central bank infrastructure.

The CBDC vs. stablecoin settlement comparison provides guidance for fund sponsors designing settlement architectures that can accommodate the transition from stablecoin to CBDC settlement. The SEC vs. ESMA comparison examines how the ECB’s CBDC initiative positions the EU relative to the US (where the Federal Reserve has not committed to wholesale CBDC). The institutional investor guide covers settlement infrastructure evaluation as a component of operational due diligence. The ECB publishes trial results at ecb.europa.eu.

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