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股市波动的杠杆效应检验:一种新的方法

, PP. 31-37

Keywords: 收益,波动,杠杆效应,似无关模型

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Abstract:

?股市波动的非对称性特征一直是金融研究中关注的焦点问题。本文首次构建了一个非平衡似无关波动模型,从个股角度对波动的非对称性进行检验。通过与综合指数的对比研究,本文揭示了市场因素对波动非对称性的影响。实证结果表明,我国深证成份指数波动存在杠杆效应,而成份股波动却表现出反向杠杆效应。市场同时存在的共同因素和异质因素,是导致成份股波动和成份指数波动表现不一致的原因。进一步的研究结果表明,在消除共同因素影响后,成份股波动的反向杠杆效应会表现更明显。

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