There is a  difference between green bonds and perpetual securities, sustainability bonds and sustinability-linked bonds (SLB). Green bonds and perpetuals are likely to fund only green projects; sustainability bonds fund green and/or social projects;  and the use of proceeds for sustainability bonds are broader versus green bonds and perpetuals, notes OCBC Credit Research in an update on dated July 16.

Blue bonds are a subset of green bonds, where proceeds are generally, likely to be used for marine and ocean related projects.

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