The Financial Crisis that started in 2007 ushered in new responsibilities for central banks, particularly for what is termed "macro-prudential policy," or MPP. The goal of this policy is to monitor and contain overall risk in the financial sector. Implementing MPP, however, carries the potential for distributional conflict with the largest financial firms and the politicization of central bank policy. In light of this risk, this essay analyses the institutional implications of MPP for a leading central bank, the U.S. Federal Reserve. Specifically, how will MPP affect the autonomy of the Fed to set the policy it thinks right? The analysis is based on interviews with financial regulators, including Fed staffers and policymakers, and with journalists who report on financial regulation. It is also informed by a case study of the "Volcker Revolution" in monetary policy. Based on these sources, I identify the factors that contributed to All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means without the prior permission in writing of the publisher nor be issued to the public or circulated in any form other than that in which it is published.Requests for permission to reproduce any article or part of the Working Paper should be sent to the editor at the above address.