Common Equity Tier 1

Common Equity Tier 1
Name	Common Equity Tier 1
Type	Regulatory capital component
Introduced	Basel III
Regulated by	Basel Committee on Banking Supervision
Primary use	Bank capital adequacy

Common Equity Tier 1 is the principal measure of a bank's core equity capital, consisting of common shares and retained earnings that absorb losses. It underpins regulatory assessments by international standards bodies like the Basel Committee on Banking Supervision, national supervisors such as the Federal Reserve (United States), the European Central Bank, and market participants including Moody's Investors Service. The metric influences actions by institutions like Goldman Sachs, Deutsche Bank, and HSBC and affects regulatory events such as the 2008 financial crisis and policy responses like the Dodd–Frank Wall Street Reform and Consumer Protection Act.

Definition and Components

Common Equity Tier 1 comprises instruments considered the highest-quality capital: common shares, stock surplus, retained earnings, and accumulated other comprehensive income. Core components trace to corporate instruments issued by firms such as Apple Inc., Toyota, and Royal Dutch Shell whose equity structures resemble capital elements in banks like JPMorgan Chase, Bank of America, and Barclays. Deductions and adjustments reference items recognized by standards bodies including the International Monetary Fund, the European Banking Authority, and the Financial Stability Board and interact with accounting frameworks like International Financial Reporting Standards and U.S. Generally Accepted Accounting Principles.

Regulatory Framework and Basel Standards

Basel III set minimum CET1 requirements and conservation buffers, building on prior accords such as Basel I and Basel II and guided by the Basel Committee on Banking Supervision housed at the Bank for International Settlements. National implementations involve regulators like the Prudential Regulation Authority, the Swiss Financial Market Supervisory Authority, and the Monetary Authority of Singapore, and legislative frameworks such as the Banking Act of 2009 in national contexts including United Kingdom, Switzerland, and Singapore. Stress testing regimes by agencies like the Federal Deposit Insurance Corporation, the European Banking Authority, and the Office of the Comptroller of the Currency operationalize CET1 thresholds through scenarios influenced by events like the European sovereign debt crisis.

Calculation and Risk-Weighted Assets

The CET1 ratio equals CET1 capital divided by risk-weighted assets, where risk weights are assigned to exposures by categories exemplified in portfolios of Citigroup, UBS, and Credit Suisse. Methods involve standardized approaches and internal ratings-based models overseen by supervisors such as the Bank of England and the People's Bank of China. Adjustments reference securitizations, derivatives, and off-balance-sheet items tied to transactions like those by Lehman Brothers and instruments referenced in frameworks from IOSCO and the International Accounting Standards Board. Calibration of risk-weighted assets interacts with capital floors, exposure measures, and regulatory items influenced by rulings like decisions from the European Court of Justice.

Role in Bank Capital Adequacy and Supervision

CET1 serves as the primary buffer to absorb losses, informing supervisory actions by authorities such as the European Central Bank, the Federal Reserve (United States), and the Bank of Japan. It determines capital conservation and countercyclical buffers applied by bodies including the Financial Stability Board and national entities like the Australian Prudential Regulation Authority. Resolution regimes exemplified by frameworks in Ireland, Canada, and Italy use CET1 for loss-absorption assessments, while market discipline mechanisms involve ratings by Standard & Poor's, Fitch Ratings, and Moody's Investors Service.

Historical Evolution and Reforms

The CET1 concept evolved from earlier capital measures in accords like Basel I and Basel II after crises including the 1997 Asian financial crisis and the 2008 financial crisis. Reforms spurred international responses featuring the G20 summits and initiatives by the Financial Stability Board and led to legislative outcomes such as the Dodd–Frank Wall Street Reform and Consumer Protection Act and regulatory packages in the European Union like the Capital Requirements Directive. Prominent bank failures including Lehman Brothers and restructurings at RBS influenced revisions to CET1 definitions and supervisory expectations.

Market Implications and Capital Management

Banks manage CET1 through retained earnings, equity issuances, and asset disposals, as seen in actions by Banco Santander, ING Group, and Societe Generale. Market reactions to CET1 metrics affect equity valuations tracked on exchanges like the New York Stock Exchange, the London Stock Exchange, and Euronext and drive investor behavior among institutions such as BlackRock, Vanguard Group, and Goldman Sachs. Capital planning links CET1 targets to liquidity frameworks like Basel III Liquidity Coverage Ratio and macroprudential tools applied by central banks during episodes akin to the COVID-19 pandemic.

Criticisms and Limitations

Critiques of CET1 focus on risk-weighted asset complexities, comparability issues across jurisdictions, and potential incentives for regulatory arbitrage exploited by banks such as BNP Paribas, HSBC, and Banco Santander. Academics and policymakers at institutions including London School of Economics, Harvard University, and the Brookings Institution question dependence on internal models and propose alternatives like leverage ratios inspired by proposals from the International Monetary Fund and think tanks such as the Peterson Institute for International Economics. Legal and political debates in forums like the European Parliament and national legislatures reflect tensions between financial stability goals and competitive dynamics among multinational banks.

Category:Banking