The Basel I accord primarily used a risk-based capital ratio to determine the capital adequacy of banks. This ratio is the ratio of a bank’s capital to its risk-weighted assets (RWA). The risk-weighted assets include both on-balance sheet assets (based on accounting conventions) and off-balance sheet exposures such as loan commitments and derivatives exposures. The risk-based capital ratio is designed to ensure that a bank has sufficient capital to cover the risks associated with its assets. The higher the risk associated with an asset, the higher the capital requirement. This approach encourages banks to manage their risk exposures and maintain a strong capital base, thereby promoting the stability and efficiency of financial systems.

Choice A is incorrect. While the leverage ratio is a financial metric used to evaluate a bank’s financial health by measuring its capital against its consolidated assets, it was not the primary ratio used by Basel I for determining capital adequacy. The leverage ratio does not take into account the riskiness of a bank’s assets, which was a key focus of Basel I.

Choice C is incorrect. This choice suggests that both the leverage ratio and risk-based capital ratio were primarily used by Basel I to determine capital adequacy. However, as explained above, while both ratios are important in assessing a bank’s financial health and stability, only the risk-based capital ratio was primarily used under Basel I.

Choice D is incorrect. This choice implies that neither the leverage nor risk-based capital ratios were utilized by Basel I for determining a bank’s capital adequacy. This contradicts the fact that Basel I primarily relied on the risk-based capital ratio for this purpose.

Things to Remember

• Basel I was the first international banking accord introduced by the Basel Committee on Banking Supervision in 1988.