In this paper, we provide an overview of the concerns surrounding the variations in the calculation of risk-weighted assets (RWAs) across banks and jurisdictions and how this might undermine the Basel III capital adequacy framework. We discuss the key drivers behind the differences in these calculations, drawing upon a sample of systemically important banks from Europe, North America, and Asia Pacific. We then discuss a range of policy options that could be explored to fix the actual and perceived problems with RWAs, and improve the use of risk-sensitive capital ratios.

The turmoil in financial markets that resulted from the 2007 subprime mortgage crisis in the United States indicates the need to dramatically transform regulation and supervision of financial institutions. Would these institutions have been sounder if the 2004 Revised Framework on International Convergence of Capital Measurement and Capital Standards (Basel II accord)—negotiated between 1999 and 2004—had already been fully implemented? Basel II represents a dramatic change in capital regulation of large banks in the countries represented on the Basel Committee on Banking Supervision: Its internal ratings–based approaches to capital regulation will allow large banks to use their own credit risk models to set minimum capital requirements. The Basel Committee itself implicitly acknowledged in spring 2008 that the revised framework would not have been adequate to contain the risks exposed by the subprime crisis and needed strengthening. This crisis has highlighted two more basic questions about Basel II: One, is the method of capital regulation incorporated in the revised framework fundamentally misguided? Two, even if the basic Basel II approach has promise as a paradigm for domestic regulation, is the effort at extensive international harmonization of capital rules and supervisory practice useful and appropriate? This book provides the answers. It evaluates Basel II as a bank regulatory paradigm and as an international arrangement, considers some possible alternatives, and recommends significant changes in the arrangement.

The Basel Committee on Banking Supervision (BCBS) sets the guidelines for world-wide regulation of banks. It is the forum for agreeing international regulation on the conduct of banking. Based on special access to the archives of the BCBS and interviews with many of its key players, this book tells the story of the early years of the Committee from its foundation in 1974/5 right through until 1997 - the year that marks the watershed between the Basel I Accord on Capital Adequacy and the start of work on Basel II. In addition, the book covers the Concordat, the Market Risk Amendment, the Core Principles of Banking and all other facets of the work of the BCBS. While the book is primarily a record of the history of the BCBS, it also provides an assessment of its actions and efficacy. It is a major contribution to the historical record on banking supervision.

Analytical background -- Nature of systemic risk -- Who should be regulated (by whom) -- Counter-cyclical regulation -- Regulation of liquidity and maturity mismatches -- Other regulatory issues -- The structure of regulation -- Conclusions -- Appendix : the boundary problem in financial regulation -- Discussion and roundtables.

Staff Discussion Notes showcase the latest policy-related analysis and research being developed by individual IMF staff and are published to elicit comment and to further debate. These papers are generally brief and written in nontechnical language, and so are aimed at a broad audience interested in economic policy issues. This Web-only series replaced Staff Position Notes in January 2011.