By providing coverage for risks which are new and are not currently covered by financial actors, or are simply too costly for investors, risk mitigants increase the attractiveness and acceptability of sustainable energy projects. These include a range of targeted interventions generally aimed at reducing, re-assigning or re-apportioning different investment risks (e.g. credit enhancements, cornerstone stakes, and tools targeting different challenges across stages of the project lifecycle). As a subset of risk mitigants, techniques facilitate institutional investment in sustainable energy infrastructure projects by reducing the transaction costs associated with these investments while also mitigating risk in some cases (e.g. warehousing, securitisation and supporting co-investment and collaboration among institutional investors).