The paper focuses on the case of ‘Use-of-Proceeds Green Bonds’ (UoP GB) that represent 95% of the market in 2016. It discusses the link between increasing investment in UoP-GB on the one hand, and the growth of investments in green projects by issuers on the other hand, suggesting how this approach can be enhanced to achieve further impact. The paper shows that we currently lack evidence to conclude that as currently designed UoP GB contribute – or can without further enhancement contribute – to scaling up the investments in green projects.