This report from Chartis and Moody’s ESG Solutions Group considers how climate stress tests are developed, and assesses the data, technology and modeling requirements and challenges involved. It starts by outlining the regulatory context, considering at a high level the trajectory of different supervisory bodies involved in stress testing climate change. Then we consider climate risk models, assessing the data foundation for building effective stress-testing frameworks, before examining the modeling and technology infrastructure FIs require to quantify the financial impacts of climate change.