Hong Kong’s tokenised green bonds saw efficiency gains from blockchain-based trading, HKMA says, but challenges remain
- Project Evergreen, which issued US$102 million in green bonds on a distributed ledger in February, saw ‘significant operational improvement’ in trading
- Challenges to wide adoption remain in the largely paper-based industry, the HKMA concluded, including interoperability issues between platforms

The initiative, called Project Evergreen, showed that the use of distributed ledger technology (DLT) achieved “significant operational improvement”, the HKMA said in a conclusion paper published on Thursday. The authority also highlighted issues that remain to be resolved, including potential problems with interoperability between different systems, which could arise when people buy blockchain-based bonds with fiat currency, for example.
“Despite the increasing number of issuances globally in recent years, bond tokenisation is still at its infancy; multiple challenges would have to be overcome for it to be widely adopted,” Eddie Yue Wai-man, chief executive of the HKMA, wrote in the report.
While a typical bond issuance process involves multiple organisations interacting through different systems to manage issuance, settlement, payment and redemption, DLT improves efficiency by “bringing together all the different parties onto one common platform”, providing “an immutable single source of truth”, the HKMA wrote.
DLT also allowed settlement to be done “instantly and simultaneously”, thus reducing risks and delays from the process, the regulator said.