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Risk-weighted asset (also referred to as RWA) is a bank's assets or off-balance-sheet exposures, weighted according to risk. [1] This sort of asset calculation is used in determining the capital requirement or Capital Adequacy Ratio (CAR) for a financial institution.
Capital Adequacy Ratio (CAR) also known as Capital to Risk (Weighted) Assets Ratio (CRAR), [1] is the ratio of a bank's capital to its risk. National regulators track a bank's CAR to ensure that it can absorb a reasonable amount of loss and complies with statutory Capital requirements.
Under A-IRB banks are supposed to use their own quantitative models to estimate PD (probability of default), EAD (exposure at default), LGD (loss given default) and other parameters required for calculating the RWA (risk-weighted asset). Then total required capital is calculated as a fixed percentage of the estimated RWA.
Basel III requires banks to have a minimum CET1 ratio (Common Tier 1 capital divided by risk-weighted assets (RWAs)) at all times of: . 4.5%; Plus: A mandatory "capital conservation buffer" or "stress capital buffer requirement", equivalent to at least 2.5% of risk-weighted assets, but could be higher based on results from stress tests, as determined by national regulators.
Estimate the risk parameters—probability of default (PD), loss given default (LGD), exposure at default (EAD), maturity (M)—that are inputs to risk-weight functions designed for each asset class to arrive at the total risk weighted assets (RWA) The regulatory capital for credit risk is then calculated as 8% of the total RWA under Basel II.
The Tier 1 capital ratio is the ratio of a bank's core equity capital to its total risk-weighted assets (RWA). Risk-weighted assets are the total of all assets held by the bank weighted by credit risk according to a formula determined by the Regulator (usually the country's central bank). Most central banks follow the Basel Committee on Banking ...
Regulators have said the proposal would result in a 16% increase in capital levels and a 20% increase in risk-weighted assets for big banks. In the months since, the banks have launched a campaign ...
The capital ratio is the percentage of a bank's capital to its risk-weighted assets. Weights are defined by risk-sensitivity ratios whose calculation is dictated under the relevant Accord. Basel II requires that the total capital ratio must be no lower than 8%.