Capital Ratios

Risk-weighted assets make the assessment sensitive to the relative risk of a bank’s exposures rather than treating every asset identically. Greater weights assigned to riskier exposures increase the capital needed to support them, while lower weights reduce that requirement. This links regulatory expectations more closely to potential losses and helps evaluate whether lending is supported by an adequate financial buffer.

Regulators distinguish among qualifying forms of capital when assessing a bank’s capacity to absorb losses. Core and supplementary categories therefore contribute within a structured regulatory comparison rather than serving as interchangeable measures. Examining these categories helps show how the composition of a bank’s financial resources supports solvency and whether its reported position meets applicable minimum requirements.

Higher capital ratios can strengthen a bank’s ability to withstand losses, but meeting them may also limit how much lending the institution can support. Reduced lending capacity can influence credit creation, investment, employment, and economic growth. The policy challenge is therefore to improve financial resilience without unnecessarily restricting the financing that businesses and households depend on.

Assessment begins by identifying the qualifying capital measure and the relevant comparison base, such as total assets, risk-weighted assets, or another exposure measure. Regulators then compare the two through a ratio and evaluate the result against minimum requirements. Using different denominators can provide different perspectives on financial resilience and the institution’s potential loss-absorption capacity.

Capital ratios operate beyond the condition of an individual institution because they can influence the vulnerability of the wider financial system. Minimum requirements encourage banks to maintain resources that can absorb losses, which may protect depositors and support confidence. At the same time, tighter requirements can affect credit creation and therefore transmit through investment, employment, and broader economic activity.

A stronger capital ratio generally indicates greater capacity to absorb losses and remain solvent, assuming the underlying measures accurately represent the institution’s assets and exposures. It can improve confidence and offer greater protection to depositors. Across the banking system, stronger positions may also reduce systemic vulnerability, although requirements that become tighter can constrain credit-supported economic activity.