For those non-bankers among you, over-subscription means getting more orders than you can fill - in the case of most climate and green bonds this year, way more.
Kommunalbanken (KBN) had USD840 million of orders from over 40 investors, 58% of which were "socially responsible investment (SRI) portfolios". Given the number of times central banks appearing on green bond buyer lists (see below), everyone's turning into an SRI buyer nowadays. And that's the way it should be.