BIS Collaborates with Singapore’s MAS, Bringing CBDC Pilot to a Close
The Bank for International Settlements (BIS) has recently signified the culmination of Project Mariana, a pilot initiative centered on exploring the cross-border trading and settlement of wholesale central bank digital currencies (CBDCs).

Updating financial market infrastructure
The bank of central banks published the findings of the project on Thursday. Conceived in partnership with the Monetary Authority of Singapore (MAS) alongside the central banks of France and Switzerland, the endeavor could have profound implications for the future landscape of financial market infrastructure.
Project Mariana, conducted under the patronage of the BIS, harnessed principles gathered from the emerging world of DeFi to probe the viability of employing automated market makers (AMMs) for CBDC trading and settlement.
The project involved three key facets:
DeFi Ingenuity: Project Mariana took inspiration and cues from the DeFi universe, particularly AAMs, to streamline foreign exchange trading and settlement. This approach was designed to bolster market efficiency while curtailing settlement risks.
Cross-Border CBDC Transactions: Hypothetical wholesale versions of the Swiss franc, euro, and Singapore dollar in CBDC form were tested for cross-border trading and settlement. The central banks of France, Singapore, and Switzerland orchestrated simulated transactions via AAMs to gauge feasibility.
Interoperability and Token Standards: The project showcased the practical application of a standardized technical token format offered by a public blockchain, enabling seamless interoperability across various currencies. This interoperability element played a pivotal role in facilitating cross-border CBDC transactions.
While the project represents a significant move forward for the BIS in its consideration of decentralized technology, the organization is still mindful that these decentralized tools are in their infancy and in need of further scrutiny and experimentation.
With that, the BIS Innovation Hub has outlined its intent to further explore the prospective advantages and obstacles associated with DeFi-infused solutions within pertinent use cases going forward.
Proof of concept
While the BIS and participating central banks were happy with the outcome of the project, the exercise was still a proof of concept and doesn’t mean there will be any immediate adoption of CBDCs by the participating nations.
Rather, it spotlights the potentials of CBDCs and DeFi in streamlining financial transactions and enhancing efficiency. Central banks can oversee wholesale CBDCs without necessarily exerting control over the underlying infrastructure, thereby furnishing commercial banks with a potent tool for instantaneous FX trading and settlement while simultaneously mitigating credit and settlement risks.
The project also shone a spotlight on certain challenges, including the logistical intricacies arising from the 24/7 availability of wholesale CBDCs. Nevertheless, the manifold advantages of instant foreign exchange trading and settlement appear to outweigh these hurdles.
Central bankers are likely to want a different outcome from the use of this technology by comparison with those who are currently knee-deep in building out DeFi. One commentator on X had a cynical take on the project, stating: “Intermediaries attempting to justify their existence in an age with bitcoin.”
Notwithstanding that, FX is the largest financial market in the world, where $7.5 trillion in value is traded every day. To utilize DeFi technology in that context would likely be profound, regardless of the nature of the application of the technology.


