This timely Research Handbook explores the rapidly evolving landscape of climate finance and investment law. Leading experts examine the effectiveness of finance and investment frameworks in achieving climate policy objectives, as well as identifying legal trends and future research topics in the field. Key topics in this Research Handbook include institutional climate finance under the United Nations Framework Convention on Climate Change (UNFCCC) and other international arrangements, the implications of trade and investment treaties, and the mechanics of project finance. By analysing the practical aspects of project implementation and finance, contributors outline developments in international financial institutions, climate risk disclosure, and insurance mechanisms. With a forward-looking approach, the Research Handbook provides critical insights into the future of climate finance and investment from a legal and institutional perspective. The Research Handbook on Climate Finance and Investment Law is an essential resource for scholars and students in the fields of climate law and policy. Bridging legal scholarship with practical insight, it is also of great benefit to policymakers and practitioners working at the intersection of climate change, law, investment, and finance.