Basel III

What Is Basel III?

Basel III is a set of international banking standards agreed by the Basel Committee on Banking Supervision, a group of banking regulators that meets at the Bank for International Settlements in Basel, Switzerland. It was developed in response to the 2007–2009 global financial crisis, which exposed banks that held too little loss-absorbing capital and depended heavily on short-term funding. Basel III builds on earlier Basel frameworks. It is not a law by itself. Each country's regulators adopt it into their own rules, often with local adjustments and different timelines.

Main Components

Basel III strengthens bank rules in several areas:

• Capital: banks must hold more common equity, the most loss-absorbing form of capital, measured against risk-weighted assets. Additional buffers can be built up in good times and drawn down during stress.
• Leverage: a simple leverage ratio limits how much a bank can borrow relative to its total exposures, without relying on risk weightings.
• Liquidity: the liquidity coverage ratio requires banks to hold enough high-quality liquid assets to withstand a 30-day stress scenario, while the net stable funding ratio encourages more stable, longer-term funding.

Why It Matters to Investors

Basel III shapes how much capital banks must keep, which in turn affects how much they can lend, pay in dividends, or spend on share buybacks. Regulators assess a bank's capital adequacy ratio against these requirements, and banks disclose these figures in their financial reports. Understanding these measures can help investors interpret a bank's financial strength.

Supporters argue that higher capital and liquidity requirements make the banking system more resilient and reduce the chance that one bank's failure spreads through the economy. Critics contend that stricter rules can restrict lending or shift some activity to less regulated institutions, and that complex risk-weighting methods make it harder to compare banks. Implementation has also been phased in and revised over time, so the exact requirements and deadlines differ by jurisdiction.