Report: the Bank for International Settlements and French, Swiss, and Singaporean central banks successfully tested cross-border trading of wholesale CBDCs
Check out our project Mariana interim update foreign exchange … Forums: r/CryptoCurrency : Project Mariana: Bank of International Settlements, France, Switzerland, and Singapore Successfully Test Wholesale CBDC
Context & Ripple Effects
This result extends a 2021 France–Switzerland wholesale digital-currency trial and a subsequent Banque de France blockchain experiment involving major market participants. The coverage shows central banks moving from bilateral and domestic proofs of concept toward multi-jurisdictional market infrastructure.
It also follows work on shared CBDC APIs across online, offline, and in-store use cases, suggesting that interoperability—not merely issuing a digital currency—is becoming the central implementation question.
First-order effects
- The BIS and the French, Swiss, and Singaporean central banks have validated a cross-border wholesale-CBDC trading workflow in a test setting, giving their technical teams a common reference point for further design work.
- The test raises the profile of Project Mariana’s approach to handling foreign-exchange activity between wholesale central-bank money; it does not establish a production rollout or public-facing CBDC.
Second-order effects
- Other central-bank CBDC projects gain a more concrete interoperability benchmark, increasing pressure to test whether domestic designs can connect across borders rather than operate as isolated systems.
- Banks and financial-market participants involved in wholesale settlement may need to track competing technical standards as central banks explore how cross-border FX and settlement functions could be represented digitally.
Third-order effects
- If multi-country experiments continue to converge, wholesale CBDCs could develop as a cross-border market-infrastructure layer before any broad retail use case is settled.
- The pattern could narrow the gap between crypto-native trading concepts and regulated monetary infrastructure, while leaving governance, legal treatment, and operational adoption as the deciding constraints.
The trend: Central banks are shifting CBDC research from domestic issuance experiments toward interoperable wholesale rails for cross-border payments and foreign exchange.