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110þ°1 óÆÆ 2013c130òCreditRiskofBanks,CapitalRegulationandRiskControlofBank’sAssetsMAOHong(SchoolofEconomicsandManagement,ShanghaiSecondPolytechnicUniversity,Shanghai201209,)Abstract:Therelationshipamongthecapitalratio,theoptimalstandarddeviation,,,banksmuststrengthentheriskcontrolandreducetherisksofassets,:creditrisk;defaultprobability;equityvalue;risksofassets