Central bank digital currencies (CBDCs) and tokenized assets are reshaping the global financial landscape. At the European Central Bank (ECB) Forum on Central Banking in Sintra, Portugal, Bank of Korea Governor Hyun Song Shin articulated a forward-looking vision: tokenized government bonds could simplify debt management and pave the way for a unified ledger that seamlessly links tokenized securities, wholesale CBDCs, and commercial bank deposits.

The governor emphasized that tokenizing government bonds would streamline processes such as collateral verification, credit to asset providers&8217; accounts, and transaction reversals at the appropriate time. &8220;The big prize is tokenizing government bonds,&8221; Shin stated, adding that &8220;it is much easier, much less prone to mistakes if you have everything tokenized.&8221; His remarks underscored a growing belief among central bankers that distributed ledger technology (DLT) can make debt issuance and management more efficient, reducing operational risks and costs.

Tokenized bonds and the RWA market

The concept of tokenized real-world assets (RWAs) has gained significant traction. According to data provider RWA.xyz, U.S. Treasury debt constitutes the largest tokenized RWA category, representing approximately $14.6 billion, or about 46% of the $31.7 billion RWA market. This trend reflects a broader institutional push toward digital representations of traditional securities, aiming to benefit from programmable features, atomic settlement, and enhanced transparency.

Governor Shin&8217;s vision extends beyond simply digitizing bonds. He proposed that tokenized government bonds, a wholesale CBDC, and tokenized commercial bank deposits all reside on a unified ledger. This concept would enable near-instantaneous settlement of securities transactions while minimizing counterparty risk. The Bank of Korea has already been testing such possibilities through &8220;Project Hangang,&8221; a pilot exploring a blockchain-based wholesale CBDC system. The plan described by Shin represents a natural extension of that initiative.

BIS support for tokenization

The Bank for International Settlements (BIS), the global central bank hub, published a report in July 2025 that examined the potential of government bond tokenization. The report analyzed 39 tokenized bonds, including 24 corporate and 15 government issuances. It found &8220;suggestive evidence&8221; that tokenized bonds had lower bid-ask spreads compared with conventional bonds, with comparable issuance costs and yields. The BIS concluded that tokenization could improve market efficiency, reduce settlement risk, broaden investment access, and spur the creation of new financial services, provided that regulatory and infrastructure challenges are addressed.

Government securities play a critical role in financial systems, serving as safe-haven assets for households and firms as well as essential collateral in a wide range of transactions. By enabling contingent execution of actions, tokenization can enhance market efficiency, reduce settlement risk, broaden investment access, and spur the creation of new financial services.

Historical context and South Korea&8217;s digital currency journey

South Korea has been at the forefront of central bank digital currency research. The Bank of Korea initiated a CBDC pilot program in 2021, testing a wholesale CBDC for interbank settlements and a retail CBDC for general public use. The pilot, named Project Hangang (after the river that flows through Seoul), explored the use of blockchain technology to improve payment efficiency and financial inclusion. Governor Shin&8217;s latest comments indicate a strategic shift toward integrating tokenized securities into the CBDC infrastructure, creating a comprehensive digital ecosystem.

This approach mirrors similar experiments in other jurisdictions. The European Central Bank has been testing a digital euro, while the People&8217;s Bank of China has already launched a digital yuan for retail use. However, few central banks have explicitly proposed linking wholesale CBDCs with tokenized bonds and bank deposits on a single ledger. If successfully implemented, South Korea&8217;s unified ledger could become a model for how sovereign debt markets and payment systems seamlessly interact in a tokenized economy.

Technical and regulatory considerations

Implementing a unified ledger for tokenized bonds and CBDCs requires addressing several technical and regulatory hurdles. Firstly, interoperability between different blockchain networks must be ensured, as legacy systems and various proprietary blockchains are currently isolated. The BIS report highlighted the importance of standardizing protocols for tokenizing securities and settling them against central bank money. Secondly, legal frameworks need to be updated to recognize tokenized instruments as valid legal assets with the same rights as traditional bonds. Thirdly, robust cybersecurity measures are essential to protect against hacks and systemic risks.

Governor Shin acknowledged these challenges during the ECB Forum session. He noted that regulatory sandbox approaches and phased rollouts could help mitigate risks while allowing innovation to flourish. The Bank of Korea aims to share its findings with international bodies like the BIS and the International Monetary Fund to foster global standards.

Implications for global finance

If the Bank of Korea succeeds in its tokenized bond and unified ledger ambition, it could transform how governments manage debt. Issuance costs could decrease, settlement times could shrink from days to minutes, and the need for intermediaries may be substantially reduced. Moreover, tokenized bonds could democratize access to sovereign debt, allowing smaller institutional investors and even retail participants to hold fractionalized government securities with lower minimum investment barriers.

The broader impact on financial stability is still being debated. Proponents argue that programmable money and smart contracts reduce human error and enhance transparency. Critics worry about the potential for disintermediation, the concentration of risk in blockchain infrastructure, and the challenge of monetary policy transmission when central bank money coexists with commercial bank money on the same ledger. Governor Shin&8217;s emphasis on a unified ledger suggests a compromise: central banks would retain control over the issuance and settlement of wholesale CBDCs, while commercial banks could tokenize deposits under regulatory oversight.

Related developments include the work of the BIS Innovation Hub, which has been exploring various use cases for tokenized assets through projects such as Project Mariana (automated market makers for FX) and Project Promissa (tokenized securities). These initiatives provide a proof of concept that central bankers across the globe are actively preparing for a tokenized future.

In the meantime, the tokenized bond market continues to grow. Private sector efforts, such as the tokenization of U.S. Treasury bonds on Ethereum and other blockchains, have already demonstrated demand. However, the involvement of a major central bank like the Bank of Korea could accelerate official sector adoption and pave the way for interoperability between sovereign digital currencies and tokenized assets.

As Governor Shin concluded in his remarks, the value of tokenization extends beyond efficiency to include improved transparency and auditability. By moving to a unified ledger, central banks can create an integrated financial infrastructure that reduces fragmentation and enhances the security of the global financial system. The Bank of Korea&8217;s forward-looking approach is a significant step toward turning that vision into reality.

Source: Cointelegraph News