The United Nations’ sustainable development goals provide an ambitious blueprint for addressing global economic, environmental, social and governance challenges by 2030. Yet, traditional sources of finance are insufficient to close the SDG financing gap, estimated at between $2.5tn and $4tn annually. Closing this gap requires the exploration of bold but necessary financing solutions. Among these, bonds have emerged as a promising blended finance instrument to attract both public and private sector investment in projects that contribute to the SDGs, particularly in developing countries. Blended finance structures often involve the use of concessional capital to absorb some of the risk, thereby encouraging private investor participation. By de-risking investments, bonds can unlock significant private sector resources that might otherwise remain untapped due to concerns about returns or stability. […]