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1.
本文以沪深两市的股票为研究对象,考察了近几年逐渐成长起来的阳光私募基金对股票流动性和信息效率的影响。研究发现:阳光私募基金持股比例越高,股票流动性越强。说明阳光私募基金改善了股票的流动性,能起到灵活市场的作用。阳光私募基金持有股票比例越高,股票信息效率越高。阳光私募基金交易股票的频率越高,信息效率越低。说明阳光私募基金持有股票在一定程度上能够改善股票的信息效率,但频繁交易却降低了信息效率,这也从另一个角度说明阳光私募基金应采取较为稳健的投资策略。由上述结论可以推断出,阳光私募基金在一定程度上起到了稳定市场的作用。  相似文献   

2.
陈辉  黄剑 《投资研究》2012,(3):90-100
股票流动性是金融市场微观结构的核心议题,其影响因素问题受到了人们的广泛关注。然而,以往的研究存在两个方面的重要缺陷:一是多数研究仅关注了股权结构对股票流动性的影响,而忽略了公司特征因素的作用;二是以往股权结构视角的研究由于存在研究设计上的问题,使得实证结论的可靠性不高。本文使用2003-2009年沪深两市仅发行了A股的上市公司为样本,采用高频交易数据构造买卖价差以衡量股票流动性,考察了公司特征、股权结构与股票流动性之间的关系,以及股权分置改革对这一关系的影响,得到了与以往研究不同的实证结论。针对这些结论,本文给出了符合我国制度背景的理论阐释。  相似文献   

3.
柜台市场会计信息披露研究——国外文献述评与启示   总被引:1,自引:1,他引:0  
会计信息披露是降低信息不对称的重要方式,柜台市场信息的不对称影响做市商的报价价差,从而影响市场的流动性。本文分别围绕会计信息披露对买卖价差的影响、会计信息披露对市场流动性的影响、会计信息披露与柜台市场有效性的关系三方面,对国外文献进行梳理和分析,并阐明会计信息披露对构建我国柜台市场的重要意义。  相似文献   

4.
以2013-2016年391支股票的360搜索指数中的投资者关注度和媒体关注度的指数作为网络关注度度量指标,同时基于股票市场交易数据采用多种信息不对称计算方法构建了信息不对称性度量指标,并进一步构造了信息不对称主成分综合指标。通过建立横截面回归模型,探究投资者和媒体关注度对我国股票市场的信息不对称程度的影响作用。实证分析及稳健性检验结果表明:投资者关注度的增加会减少知情交易及信息不透明程度,从而减少了股票市场的信息不对称程度,提高了股票市场的流动性;媒体关注度对不同的信息不对称性度量指标的影响存在着不一致性。本研究通过探索投资者关注度及媒体关注度在新兴市场中的应用,对于我国证券市场监管层制定政策以及对于普通投资者优化投资策略都具有重要的参考意义。  相似文献   

5.
本文根据股票买卖价差、有效价差、价格冲击指数、流动性指数、市场深度和大宗交易成本六个指标对中国股票市场流动性进行比较研究,研究表明:沪深两市的流动性均呈现出逐步改善的趋势.从流动性指数、市场深度及大宗交易成本上衡量,上海股市的流动性好于深圳股市,而从价格冲击指数及相对买卖价差衡量,深圳股市的流动性高于上海股市;与国际主要证券市场比较,沪深两市的流动性水平在新兴市场名列前茅,但低于全球平均水平.  相似文献   

6.
搜索引擎的广泛应用促使互联网成为普通投资者获取信息的重要渠道。百度指数体现关键词被搜索的频率,在一定程度上表征着投资者对信息的关注程度。本文以上证180指数样本股为研究对象,以百度指数用户关注度衡量普通投资者关注度,揭示普通投资者关注对股票流动性及股票收益的影响机制。实证结果表明:在控制其他影响因素后,普通投资者高关注度将伴随高市场流动性,注意力会驱动投资者进行交易;对信息的当期关注会对股票收益产生正向影响,但这一现象将在一段时间后发生反转。  相似文献   

7.
利益输送、信息不对称与定向增发折价   总被引:4,自引:0,他引:4  
定向增发作为资本市场权益再融资的重要方式之一,已日益受到监管层、上市公司和投资者的重视。本文研究了定向增发折价的形成原因。研究结果显示,大股东的机会主义行为和上市公司与投资者之问的信息不对称是定向增发折价的重要决定因素。我们发现,当大股东购买定向增发股票的比例与其在增发前持有的上市公司股权比例差额越大时,增发折价也越高,并且增发价格相对于基准价格的溢价越低。这一结果表明,大股东通过定向增发实现了以较低的对价稀释中小股东权益的目的,从而在一定程度上侵害了后者的利益。此外,与国外的研究一致,定向增发的折价还与信息不对称的程度成正比,即当不对称的程度越高时,增发的折价也越高。  相似文献   

8.
基于我国可转换公司债券市场日交易数据的实证研究发现,市场流动性衡量存在显著的维度效应,不同维度的信息重叠不大,买卖价差、交易量和交易间隔时间等单维度衡量指标提供的市场流动性信息有限,价格变化自协方差和价格冲击等多维度衡量指标比单维度衡量指标能够更全面地衡量市场流动性状况。  相似文献   

9.
本文以2011-2017年间发生在我国A股市场的公开市场回购事件为样本,探究了管理层与投资者之间信息不对称程度对股票回购宣告效应的影响。结果表明:上市公司可以通过公开市场回购取得显著正向的宣告效应,该效应与上市公司的信息不对称程度成正比,与既有估值水平成反比。这说明信息不对称程度对股票回购宣告效应具有较强的解释力,验证了"信号传递假说"在A股市场的适用性。  相似文献   

10.
本文实证研究了我国股票市场的流动性问题。结果表明,产品市场势力能够促进信息传递,提高股票的流动性。这种影响即使控制了公司治理因素依然显著,同时随着信息不对称程度的提高而更为明显。另外,在对股票流动性的影响上,产品市场势力与董事会规模、高管薪酬激励之间存在替代关系。同时,股权分散能增强产品市场势力的影响,但是产品市场势力会削弱股权分散的积极作用。  相似文献   

11.
本文对中国股市流动性溢价的存在性和稳定性进行了实证检验。文章分四部分:第一部分关于流动性与流动性溢价的定义:第二部分利用因子分析构建一个综合性的流动性指标;第三部分从行业角度实证检验中国股市流动性溢价的存在性;第四部分从行业角度来实证检验中国股市流动性溢价的稳定性。  相似文献   

12.
利用EGARCH模型,对2000年1月至2007年4月间沪深两市具有代表性的股票及指数的开收盘收益率的波动性进行实证分析,结果表明收益率序列有明显的ARCH效应,其波动性具有显著的非对称性的冲击的持续性;在样本期内,上交所的个股和指数未能观察到开盘波动性高于收盘波动性的现象,而深交所个股在2006年7月实施收盘集合竞价机制之后比较明显地观察到开盘波动性高于收盘波动性的现象。  相似文献   

13.
李少育  张滕  尚玉皇  周宇 《金融研究》2021,494(8):190-206
与国外发达市场相比,我国A股主板市场的市场摩擦因素对市场微观结构和资产定价的影响更大。在防范和化解系统性风险的过程中,进一步分析市场摩擦如何作用于特质风险定价效应的问题具有重要的理论和现实意义。本文通过采用多维市场摩擦指标来代理信息不对称、交易成本、买卖限制、卖空限制、风险对冲和外部冲击,检验中国股市特质风险和预期收益率的关系,并判断出市场摩擦因素间的差异性影响机制。回归发现,市场摩擦和特质风险因子(特质波动率和特质偏度)都具有定价效应。各维度市场摩擦因素降低了股票流动性,进而增强了特质波动率的负向定价效应,部分解释了“特质波动率之谜”,但市场摩擦对特质偏度因子溢价的影响较为微弱。同时,基于特质波动率和特质偏度因子的投资策略能够产生超越CAPM、三因子和五因子模型的绝对收益,并印证了市场摩擦对特质风险因子绝对收益的影响作用。  相似文献   

14.
In this paper, we investigate the empirical relationship between institutional ownership, number of analysts following and stock market liquidity. We find that firms with larger number of financial analysts following have wider spreads, lower market quality index, and larger price impact of trades. However, we find that firms with higher institutional ownership have narrower spreads, higher market quality index, and smaller price impact of trades. In addition, we show that changes in our liquidity measures are significantly related to changes in institutional ownership over time. These results suggest that firms may alleviate information asymmetry and improve stock market liquidity by increasing institutional ownership. Our results are remarkably robust to different measures of liquidity and measures of information asymmetry.  相似文献   

15.
We examine the impact of mandatory portfolio disclosure by mutual funds on stock liquidity and fund performance. We develop a model of informed trading with disclosure and test its predictions using the May 2004 SEC regulation requiring more frequent disclosure. Stocks with higher fund ownership, especially those held by more informed funds or subject to greater information asymmetry, experience larger increases in liquidity after the regulation change. More informed funds, especially those holding stocks with greater information asymmetry, experience greater performance deterioration after the regulation change. Overall, mandatory disclosure improves stock liquidity but imposes costs on informed investors.  相似文献   

16.
We examine the relationship between the quality of corporate governance and information asymmetry in the equity market around quarterly earnings announcements. We use the change in market liquidity (i.e., bid–ask spreads and depths) around the announcements as a proxy for information asymmetry. We use principal components analysis to identify three factors, board independence, board structure and board activity, that capture the information in the eight individual corporate governance variables we examine. We then use ordinary least squares and two-stage least squares to estimate the relations between market liquidity changes and the following four explanatory variables: directors’ and officers’ percentage stock holdings, board independence, board structure, and board activity. Our results indicate that changes in bid–ask spreads at the time of earnings announcements are significantly negatively related to board independence, board activity, and the percentage stock holdings of directors and officers. We also find that depth changes are significantly positively related to board structure, board activity, and directors’ and officers’ percentage stock holdings. Our results are consistent with the hypothesis that firms with higher levels of corporate governance have lower information asymmetry around quarterly earnings announcements.  相似文献   

17.
以2007~2008年沪深两市A股上市公司年报作为研究基础,运用描述性统计和两阶最小二乘法分析了自愿性信息披露对上市公司股票流动性的影响。验证了自愿性信息披露会促进上市公司股票的流动性,同时发现自愿性披露信息中财务方面信息对上市公司股票流动性的提高作用最大。  相似文献   

18.
Corporations increasingly define their corporate social responsibility (CSR) activities as a part of their business. However, is this trend beneficial to investors? Based on an event study methodology and a sample of Chinese listed companies, we extend the literature on voluntary disclosure by exploring the role of CSR disclosure in reducing stock market information asymmetry, as proxied by share price volatility and liquidity. Our results show that the share price volatility after CSR disclosure is lower than before CSR disclosure; however, the trend is that it decreases first and then increases for three months following disclosure. Stock liquidity also significantly improves after CSR disclosure; however, it increases first and then decreases. Additionally, by dividing CSR disclosure into economic (hard) disclosure and generic (soft) disclosure, we find that the reduction in information asymmetry is higher for hard disclosure than soft disclosure, suggesting that although CSR disclosure does indeed have an impact on investors’ behaviour in China, an economic‐based disclosure contributes more substantially. Finally, to better understand the characteristics of the Chinese financial market, we also explore the role of marketisation with results that show that the effect in reducing information asymmetry is greater for companies located in a region with a higher degree of marketisation.  相似文献   

19.
This paper examines the relationship between various investor groups and stock liquidity for Malaysian public listed firms over the 2002–2009 sample period. Using the Amihud illiquidity ratio, we extend the literature by addressing the issues of investor heterogeneity, trading account types and the interactions of competing liquidity channels. The analysis reveals that only local institutions and local individual investors who trade through the direct accounts are significantly associated with the liquidity of domestic firms. In contrast, the significant liquidity effect for foreign investors operates through the nominee accounts. While institutional ownership exhibits a linear negative relationship, our findings on local individuals and foreign nominees differ greatly from previous studies in that their relationship with stock liquidity is non-monotonic. Apart from the widely-researched information asymmetry and trading effects, we find that liquidity is also driven by the largely ignored information competition channel. An important insight from our findings is that the large shareholdings by any particular investor group is detrimental to stock liquidity as they exacerbate information asymmetry, reduce the degree of competition and lower the level of trading activity.  相似文献   

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