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基于马尔科夫状态转换下的CAPM实证研究

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摘要 传统资本资产定价模型(CAPM)不仅假定收益率为正态分布,同时认为反映市场风险载荷系数和条件方差是固定的,这与现实存在较大出入。实际上资产收益率的结构存在动态不断转换特性,本文从动态角度提出了基于马尔科夫状态转换下的资本资产定价模型,即允许股票系数和条件方差呈现时变状况,经与经典资本资产定价模型估计结果比较表明,本模型具有更好的效果并刻画了动态变化过程。
作者 刘丹红
出处 《华北金融》 2008年第8期7-9,共3页 Huabei Finance
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