Responsible Investing serves as a holistic resource on Environmental, Social, and Governance (ESG) investing for undergraduate and graduate programs. It provides a thorough background and history of ESG investing, as well as cutting-edge industry developments, introducing the reader to the rapidly evolving field of responsible investing. Building on the first edition, this second edition provides updates where appropriate, as well as new emphasis on the development of standards in terminology and metrics. Opening with the background of ESG investing, the book discusses the development of ESG risks and provides an overview of ESG rating systems. It outlines the current position of ESG investing in portfolio management through granular analysis, offers insight into common investor concerns about ESG investments, presents qualitative theories, and reviews literature modeling ESG investment performance. Finally, the authors provide readers with a foundation on the development of financial models measuring risk and return, which can be used to evaluate the performance of ESG investments. This edition features updated statistics and a new chapter on regulation, reporting, and taxonomy in ESG investing, as well as new international case studies. Following a summary approach, Responsible Investing is a valuable textbook, providing a context in which upper-level students of ESG investment and sustainable finance can specialize.