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政策不确定性与股票市场波动溢出效应 被引量:43

The Volatility Spillover Effect between the Stock Market and the Economic Policy Uncertainty
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摘要 利用1995年1月至2013年12月间中国上证综指对数收益率和政策不确定性指标的周数据,通过建立DCC-MGARCH模型和VARMA-BEKK-MGARCH模型考察股票市场与政策不确定性的动态相关性和双向波动溢出效应。DCC-MGARCH模型结果表明,股票市场与政策不确定性之间具有显著的相关性,该相关性具有很强的时变特征,且总体表现为负相关。VARMA-BEKK-MGARCH模型结果表明,就短期而言,中国股票市场与政策不确定性的波动性之间存在双向溢出效应;但就长期而言,两者的波动溢出效应具有不对称性,即只存在股市向政策不确定性的波动溢出,而政策不确定性对于股市的波动溢出效应不具有持续性。 Based on the weekly log return of Shanghai Composite Index and the economic policy uncertainty index between January of 1995 and December of 2013,this paper studies the dynamic linkage between stock market and economic policy uncertainty using DCC- MGARCH model,as well as the volatility spillover effect on these two series using VARMA- BEEK- MGARCH model. The DCC- MGARCH model shows that there is marketable correlation between the two series,which is generally negative with dynamic characteristic. The VARMA- BEEK- MGARCH model shows that there is bidirectional volatility spillover effect in the short run while the effect in the long run is asymmetric,that is,the volatility spillover from stock market to economic policy uncertainty is permanent,and the effect in the other way is only temporal.
出处 《金融经济学研究》 CSSCI 北大核心 2014年第5期70-78,99,共10页 Financial Economics Research
基金 国家自然科学基金面上项目(71071132)
关键词 波动溢出效应 政策不确定性 volatility spillover effect economic policy uncertainty
作者简介 陈国进(1966-),男,浙江缙云人,经济学博士,厦门大学王亚南经济研究院副院长、博士生导师,研究方向为金融计量经济学; 张润泽(1989-),男,湖南长沙人,厦门大学经济学院博士研究生,研究方向为金融市场学和计量经济学; 姚莲莲(1989-),女,广东韶关人,厦门大学经济学院硕士研究生,研究方向为金融工程。
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