Sustainable Bonds

Within the set of financial instruments that fall under the impact investing umbrella, Green, Social, Sustainability, Transition, Blue, Gender and Sustainability-Linked bonds (often collectively referred to as GSS+, ESG, thematic, labelled or sustainable bonds) have gained prominence in recent years for their potential to help bridge the SDG financing gap. Governments, especially in emerging economies, play a catalytic and pivotal role in scaling these instruments. By issuing sustainable bonds, national, regional, and local public entities mobilise capital for long-term investments with broad social and economic benefits, which often fall outside the scope of conventional, profit-driven financing.

Public issuers are not only large players in terms of volume, representing approximately 50% of sustainable bond issuances annually since 2020, but also critical market enablers. Government-led issuances serve as signals of policy commitment to sustainability, helping to build investor confidence and drive demand from both domestic and international capital markets. Moreover, public sector issuances typically align with international standards and best practices, such as the ICMA principles, thereby setting a benchmark for transparency, impact reporting, and accountability. This leadership lowers the perceived risk for other issuers and facilitates replication by subnational governments, state-owned enterprises, and even private entities. Thanks in part to these public sector efforts, the sustainable bond market continues to grow rapidly. In 2025, issuance of sustainable bonds is projected to reach USD 1 trillion, accounting for 11% of the global bond market, a milestone that reflects both rising investor appetite and the enabling role played by governments in expanding this segment of sustainable finance.

For more information on sustainable bonds and their market trends, visit S&P Ratings “Sustainable Bond Outlook 2025”, Sustainable Fitch “Sustainable Finance Outlook 2025”