鸡西大学学报
鷄西大學學報
계서대학학보
Journal of Jixi University
2015年
9期
39-42
,共4页
最小方差%套期保值%二元正态Copulat-Copula
最小方差%套期保值%二元正態Copulat-Copula
최소방차%투기보치%이원정태Copulat-Copula
minimum variance%hedging ratio%bivariate normal Copula%t-Copula model
在传统的最小方差套期保值模型中,假定期货和现货收益率是线性匹配的,忽略了非线性匹配的情况。利用Copula模型对我国黄金期货的最小方差套期保值比率进行估计,并比较了不同形态Copula模型套期保值的效率。实证分析发现二元正态Copula模型和t-Copula模型在数据的拟合效果和套期保值的有效性方面均优于传统的套期保值模型,而且t-Copula模型的套期保值效率最高,能更好地规避现货价格风险。
在傳統的最小方差套期保值模型中,假定期貨和現貨收益率是線性匹配的,忽略瞭非線性匹配的情況。利用Copula模型對我國黃金期貨的最小方差套期保值比率進行估計,併比較瞭不同形態Copula模型套期保值的效率。實證分析髮現二元正態Copula模型和t-Copula模型在數據的擬閤效果和套期保值的有效性方麵均優于傳統的套期保值模型,而且t-Copula模型的套期保值效率最高,能更好地規避現貨價格風險。
재전통적최소방차투기보치모형중,가정기화화현화수익솔시선성필배적,홀략료비선성필배적정황。이용Copula모형대아국황금기화적최소방차투기보치비솔진행고계,병비교료불동형태Copula모형투기보치적효솔。실증분석발현이원정태Copula모형화t-Copula모형재수거적의합효과화투기보치적유효성방면균우우전통적투기보치모형,이차t-Copula모형적투기보치효솔최고,능경호지규피현화개격풍험。
The traditional minimum variance hedging model assumes that the futures and spot returns are linear match , whiole ignoring the case of non-linear matching .This paper introduces Copula Theory to estimate the minimum variance hedge ratio and compared the advantages and disadvantages of different forms of Copula model .Through the empirical analysis and comparison of bi-variate normal Copula model and t -Copula model , it is concluded that the Copula model is better than that of t -Copula model in the data fitting results , the effectiveness of hedging .The minimum variance hedge ratio is higher ,and it can evade the fluctuation of spot price .