摘要
股票价格波动主要受噪声的推动.信息透明度的提高将降低股票特质波动率.本文基于中国股票A股市场中的股票特质波动率,实证检验了我国上市公司股权结构与信息透明度之间的相关性.研究发现:1)国有法人股持股比例和股东之间力量差异的降低,有助于提高上市公司的信息透明度.2)机构投资者的加入,可以改善上市公司的信息披露环境,提高证券分析师预测行为的有效性,减少股票价格波动中的噪声成分.
The idiosyncratic volatility is mainly driven by noise in China's stock markets. However, the id- iosyncratic volatility decreases with stock price informativeness. This paper tests the relationship between the ownership structure and transparency by utilizing the idiosyncratic volatility of A-share listed companies in China. The empirical evidence shows that: 1) the transparency decreases with the state-owned shareholdings and ownership concentration, but increases with the institutional shareholdings. 2) The institutional trading im- proves the firm's information environment, and the accuracy of forecasting activities, and decreases the noise component in the stock price.
出处
《系统工程学报》
CSCD
北大核心
2015年第3期344-353,共10页
Journal of Systems Engineering
基金
国家社科基金重大资助项目(14ZDA020)
教育部规划基金资助项目(14YJA7900)
广州软科学课题资助项目(02-04)
广东软科学资助项目(2013B070206025)
广东社科基金资助项目(GD10CYJ01)
关键词
股权结构
信息透明度
股票特质波动率
ownership structure
information transparency
idiosyncratic volatility