Risk-Weighted Assets and Capital Ratios

Risk-weighted assets and capital ratios connect a bank’s qualifying capital with its regulatory exposures. The useful analysis names the numerator, denominator, reporting scope, rule, and date rather than comparing headline percentages alone.

Ratio Map

Example

A bank with $10 billion of Tier 1 capital and $100 billion of RWA has a 10% Tier 1 capital ratio. If its leverage exposure measure is $250 billion, its leverage ratio is 4%. The two measures differ because RWA apply regulatory risk methods while leverage exposure is deliberately broader and non-risk-weighted.

What to Check

• exact capital numerator and regulatory adjustments
• credit, market, and operational RWA
• on- and off-balance-sheet exposure treatment
• standardized versus model-based methods
• consolidation scope and reporting date
• applicable minimums, buffers, surcharges, and supervisory requirements
• changes caused by capital issuance, earnings, distributions, exposure growth, risk migration, or methodology

Common Mistakes

• Comparing CET1, Tier 1, and total capital ratios as if their numerators were identical.
• Treating RWA as total assets or a direct forecast of losses.
• Assuming a higher ratio always came from more capital.
• Using tangible common equity as a regulatory-capital substitute.
• Ignoring leverage, liquidity, concentrations, and asset quality.

The Basel Framework is the authoritative international starting point. Use current national rules and official bank disclosures for institution-specific analysis.

Educational Use

This section provides general financial education, not investment, banking, accounting, legal, or regulatory advice.

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