Taming the Green Swan: How to improve climate-related financial risk assessments

Climate-related financial risks might have the potential to trigger the next systemic financial crisis, as recently stated by the Bank of International Settlements. In consequence, understanding these so-called Green Swan risks should be a key priority in financial decision-making and supervision. However, a systematic approach and a comprehensive theory on climate-adjusted financial risk metrics is still missing. This study is a first step to fill this gap, with a focus on transition risks. Drawing on insights from climate science, economics and finance research, authors derive a set of important criteria to ensure that climate risk tools provide high quality, comparable, and decisionrelevant results. Authors then use a sample of 16 climate transition risk tools and conduct two lines of research: First, by aid of descriptive analysis, we assess the tools’ coverage of risk sources and financial assets, their inputs (i.e. underlying climate scenarios), and their outputs (i.e. climateadjusted financial metrics). Second, auhtors use the previously defined criteria for an in-depth analysis of the quality, comparability and decision-relevance of the tools. The results will be presented at the individual tool level, and at the meta level. Based on the results of a descriptive and criteria-based analysis, authors derive potential next steps for tool provider, conclusions for potential tool users, and guidelines for supervisory authorities.