以A,H股双重上市公司为研究对象,基于向量GARCH模型,对双重上市公司A股与H股之间的风险传染效应进行了研究,得出了与以往研究者不同的结论。研究表明,股权分置改革基本完成之后,双重上市公司A股与H股之间的风险传染效应具有了新的特征,方向是A股对H股具有风险传染效应,而H股对A股却没有风险传染效应。
Based on the MGARCH model, this paper explores the risk contagion regarding the stocks co-listed in the A share market and H share market, showing some different results. The evidence presents that, after non-tradable share reform was basically completed, new character of risk contagion of co-listed stocks has risen. The direction is that the risk spillover effect is from A shares to H shares but not from H shares to A shares.