How do banks estimate risk-weighted assets and why is it important for capital adequacy?

• A. Market share weighting of assets.
• B. Basel risk weights assigned to assets to compute capital requirements; important to determine capital held against risk.
• C. It is based on credit ratings alone.
• D. It is irrelevant to capital requirements.

Answer: (B)

Risk-weighted assets measure how risky a bank’s asset mix is, and the standard way to estimate them is by applying Basel risk weights to different asset classes to reflect their credit, market, and operational risk, then summing the results. This converts the balance sheet into a risk-adjusted exposure amount, which is then used to determine required capital: banks must hold a minimum percentage of capital against that risk-weighted amount. The higher the risk weight for an asset, the more capital is required, aligning capital with potential losses and enhancing resilience in stress scenarios. This is why RWA is central to capital adequacy under Basel rules—the framework ties how much capital a bank must hold directly to the riskiness of its assets. The other choices don’t fit because market share weights don’t determine capital needs, relying on credit ratings alone doesn’t capture the full risk picture across portfolios, and saying it’s irrelevant to capital requirements is simply incorrect.