ADB Supports Thailand’s $750 Million First Sovereign Nature-Linked Bond

Thailand has raised 25 billion baht, or about $750 million, through a 15-year sustainability-linked bond that includes a nature-related performance indicator, making it the first sovereign issuance of its kind in Asia and the Pacific. The bond links financing to two national targets: keeping net greenhouse gas emissions below 152 million tonnes of CO₂ equivalent by 2035, a 47% reduction from 2019 levels, and conserving or effectively managing at least 30% of the country’s terrestrial and inland water areas by 2030. Investor subscriptions reached 2.8 times the planned 15 billion baht issue size.

 

Nature Is Being Brought Into Sovereign Performance Targets

 

The inclusion of a nature-related KPI is the main difference between this bond and Thailand’s earlier sustainability-linked issuance in 2024. Instead of focusing only on emissions, the bond also ties performance to the country’s goal of conserving and managing at least 30% of terrestrial and inland water areas.

That broadens the scope of sovereign sustainable finance beyond climate mitigation alone. It also gives investors a measurable biodiversity-linked outcome to track alongside the emissions target, reflecting a wider shift towards including nature in public-sector financing frameworks.

 

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The Bond Links Capital Markets to National Climate Goals

 

The emissions target requires Thailand to keep net greenhouse gas emissions below 152 million tonnes of CO₂ equivalent by 2035. That would represent a 47% reduction from 2019 levels, making the bond’s performance framework directly connected to a national climate outcome rather than to a single project.

The 15-year structure gives investors a longer-term exposure to those targets, while the 25 billion baht raise shows that sustainability-linked sovereign debt can attract capital at scale. Strong demand also allowed the final issuance to exceed the original planned amount of 15 billion baht.

 

Investor Demand Reached 2.8 Times the Planned Issue

 

Subscriptions reached 2.8 times the planned issue amount, indicating strong interest from both domestic and international investors. That level of demand is significant because sovereign sustainability-linked bonds depend on investor confidence not only in the issuer’s credit quality but also in the credibility of the underlying targets and reporting framework.

ADB supported the design of the bond by helping select indicators, coordinating partners and reviewing the framework against international standards. Its involvement came through the GSS+ Finance Initiative and the Nature Solutions Finance Hub, both of which are designed to expand sustainable and nature-positive finance in the region.

 

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Thailand Could Provide a Model for Other Sovereign Issuers

 

ADB described the transaction as a model for countries looking to connect capital-market financing with measurable climate and biodiversity outcomes. The structure is especially relevant for governments that want to use sovereign debt to support broader policy objectives rather than finance one narrowly defined green project.

The bigger test will be whether Thailand can demonstrate progress against both the emissions and conservation targets over the life of the bond. If it does, the transaction could strengthen the case for other sovereign issuers in Asia to include biodiversity and nature indicators alongside climate targets.

 

Source: The Asian Development Bank (ADB)