The Bank was set up to address market failures and fill gaps in financing for infrastructure investment.41 The Bank told us that it can do this by taking risk that the market is just not willing to take, for example in “first-of-a-kind” technology. It also told us that it can take policy risks in areas that the market might not be comfortable with, developing an understanding of the direction of policy and working to amplify interventions in those policy areas.42 In general, equity investments are more suitable for higher-risk projects and are more complex transactions to undertake. In due course the Bank plans to build a portfolio of different financial instruments covering a range of different technologies and risk.43 The Treasury has specified the five sectors it wants the Bank to prioritise – clean energy, transport, digital, water and waste.44