指数化类型投资行为的存在性研究

以上证180指数先后3次调入的成分股为样本,分析消息公布日前后成分股与指数的共运程度,用以佐证我国资本市场指数类型投资行为存在性的假设,为指数化投资策略提供理论依据。研究结果表明,从消息公布日前后全体调入股票的共运程度来看,第1次和第2次消息的宣告对股票与指数的共运程度只有微弱的影响力,而第3次消息宣告对股票与指数的共运程度产生显著影响,这表明随着投资者对上证180指数了解的增进,国内指数基金的推出,我国资本市场指数化类型投资行为已逐步形成,市场投资者确实存在着上证180指数的类型投资行为。

Research on the Exist of Index Style Investing

This paper tests the exist of style investing using data on revisions in the Shanghai Stock 180 Index. Using a variety of regression specifications, we find that, the affect is weaker in the first and second index revision, but in the third index revision, when a stock is added to the index, its beta and R-squared with respect to the index increase. These results support that index style investing does exist.