Sovereign green bonds have emerged as a prominent policy instrument to mobilize climate finance, yet evidence on their pricing implications, especially across development levels and relative to unlabeled sustainability bonds, remains limited. This study provides the first global, bond-level analysis of sovereign green and sustainability bond pricing in secondary markets across advanced and emerging economies. Using Bloomberg data on 168 sovereign sustainability bonds issued between 2017 and 2023 across 44 countries, the analysis employs coarsened exact matching to estimate the greenium for green-labeled as well as unlabeled bonds. […]