经济评论
經濟評論
경제평론
Economic Review
2014年
4期
148~160
,共null页
CoVaR 分位数回归 Copula函数 DCC—GARCH模型
CoVaR 分位數迴歸 Copula函數 DCC—GARCH模型
CoVaR 분위수회귀 Copula함수 DCC—GARCH모형
CoVaR ; Quantile Regression; Copula Function ; DCC - GARCH model
条件风险价值(CoVaR)能够很好地度量风险溢出效应,是度量系统性风险的有效指标之一。计算CoVaR有多种方法,其原理不尽相同,需要合理选用方能有效评估系统性风险。分位数回归法、Copula函数法以及DCC—GARCH模型是比较典型的三种方法。本文以风险溢出关联特征为视角,从计算原理、优缺点与适用场合三个方面,对这三种计算方法做了理论比较研究。然后,分别测算了中国银行业的CoVaR,并做了有效性假设检验与比较。理论与实证研究结果均表明,对于计算CoVaR,与分位数回归法相比较,Copula函数法与DCC—GARCH模型更加有效,能够更好地评估银行业与金融体系之间的风险溢出效应。
條件風險價值(CoVaR)能夠很好地度量風險溢齣效應,是度量繫統性風險的有效指標之一。計算CoVaR有多種方法,其原理不儘相同,需要閤理選用方能有效評估繫統性風險。分位數迴歸法、Copula函數法以及DCC—GARCH模型是比較典型的三種方法。本文以風險溢齣關聯特徵為視角,從計算原理、優缺點與適用場閤三箇方麵,對這三種計算方法做瞭理論比較研究。然後,分彆測算瞭中國銀行業的CoVaR,併做瞭有效性假設檢驗與比較。理論與實證研究結果均錶明,對于計算CoVaR,與分位數迴歸法相比較,Copula函數法與DCC—GARCH模型更加有效,能夠更好地評估銀行業與金融體繫之間的風險溢齣效應。
조건풍험개치(CoVaR)능구흔호지도량풍험일출효응,시도량계통성풍험적유효지표지일。계산CoVaR유다충방법,기원리불진상동,수요합리선용방능유효평고계통성풍험。분위수회귀법、Copula함수법이급DCC—GARCH모형시비교전형적삼충방법。본문이풍험일출관련특정위시각,종계산원리、우결점여괄용장합삼개방면,대저삼충계산방법주료이론비교연구。연후,분별측산료중국은행업적CoVaR,병주료유효성가설검험여비교。이론여실증연구결과균표명,대우계산CoVaR,여분위수회귀법상비교,Copula함수법여DCC—GARCH모형경가유효,능구경호지평고은행업여금융체계지간적풍험일출효응。
CoVaR is a good measure for risk spillover effect and systemic risk. It is necessary to select an effective one from many ways of calculating CoVaR according to different theories, three popular ways of which are quantile regression, Copula function and DCC - GARCH model. We propose a theoretical comparison of these three methods on calculation principles, advantages and disadvantages, as well as their applicable occasions. Then we calculate CoVaR of China banking system using three methods and test their effectiveness. From theoretical and empirical results, we find that Copula function and DCC - GARCH model are more effective and do better in describing risk spillover effect between banking system and financial system compared with quantile regression.