Abstract The financial crisis of 2007–9 revealed serious failings in the regulation of financial institutions and markets. Prompting a fundamental reconsideration of the design of financial regulation, the financial system has become ever more complex and interconnected, and the pace of evolution continues to accelerate. It is now clear that regulation must focus on the financial system as a whole, but this poses significant challenges for regulators. This book describes how to address those challenges. Examining the subject from a holistic and multidisciplinary perspective, the book considers the underlying policies and the objectives of regulation by drawing on economics, finance, and law methodologies. The volume examines regulation in a purposive and dynamic way by framing the book in terms of what the financial system does, rather than what financial regulation is. By analysing specific regulatory measures, the book provides readers with the opportunity to assess regulatory choices on specific policy issues and encourages critical reflection on the design of regulation.