Is the ratio of bank assets to their risks. National regulators track the capital adequacy ratio of banks to ensure that banks can absorb certain risks. The definition of CAR is: CAR= Asset/risk, which can be the weighted asset risk (a) or the minimum total asset requirement stipulated by the respective national regulatory authorities. If weighted asset risk is used, then car = {t 1+t2}/a ≥ 8%. [1] The following inequalities are the standard requirements of national regulatory agencies. T 1 T2 are two types of assets that can be included in the total amount: the first type of assets (actually contributed owners' equity plus undistributed profits), that is, assets that banks can eliminate risks without stopping trading; As for the second type of assets (preferred stock plus 50% subordinated debt), assets that can resolve risks can be closed down for liquidation, with relatively little protection for depositors.