股权分置改革后我国证券市场有效性研究——基于非预期非流动性新信息视角

基于非预期非流动性新信息视角,本文研究了股权分置改革后我国证券市场效率,比较了不同的市场态势下非预期非流动性对股票收益的影响,并且研究了投资者能否基于当期的非预期非流动性新信息进行套利。实证结果表明:我国上证A股市场中,熊市阶段发挥主要作用的是非预期非流动性;市场对非流动性新信息反应不足,我国上证A股市场存在套利机会。     

上市公司自愿性信息披露对股票流动性影响的实证研究

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。     

产品市场竞争对股权资本成本的影响研究——以异质性风险为中介变量

以我国2003～2006年A股上市公司为样本,以产品市场势力为产品市场竞争的代理变量,采用"产品市场竞争—异质性风险—经济后果"这一研究范式,实证分析产品市场竞争对股权资本成本的影响及其作用路径。结果发现,产品市场势力越大、则股权资本成本越小,异质性风险是产品市场势力与股权资本成本间的中介变量。     

股票流动性会促进我国企业技术创新吗?北大核心CSSCISSCI

本文基于2006-2013年中国沪深A股上市公司数据,研究了股票流动性与企业技术创新的关系。在以专利授权量和研发效率两个维度对技术创新进行度量的基础上,使用股权分置改革和印花税调整作为准自然实验的外生冲击,结合倾向得分匹配和倍差估计法对本文提出的假说进行了实证检验,研究发现:企业性质对中国资本市场的股票流动性与企业技术创新之间的关系有明显调节作用;对于民营企业而言,股票流动性的提高降低了企业的技术创新水平;对于国有企业而言,在国有企业考核办法不断改进和股权多元化不断推进的情况下,股票流动性的提高有助于企业技术创新水平的提升。本文还就如何改善股市流动性和提高上市公司技术创新水平提出了相关政策建议。     

境外股东持股与股票流动性

是否对境外资本开放我国上市公司股权以及开放程度大小,是我国国际化进程中需要考虑的重要问题,本文使用手工收集的上市公司境外股东持股数据,研究了境外股东持股对股票流动性的影响。研究发现,境外股东持股会显著降低上市公司的股票流动性;在股票信息含量较低的公司,境外机构股东对流动性的负向影响更强,但境外个人股东对流动性的负向影响减弱,并且这种增量效应只体现在国有股持股比例较高的公司。     

股份回购如何影响股票流动性?

上市公司公开市场股份回购行为对股票市场微观运行的影响效应及其作用机制具有重要研究意义。本文从股票流动性的视角出发,使用手工收集的数据,实证检验了公开市场股份回购对股票市场流动性的影响。通过事件研究和回归分析发现,我国上市公司在二级市场实施回购降低了股票流动性。机制检验表明,股票回购提高了逆向选择成本,导致买卖价差扩大,股票流动性下降。进一步研究发现,上市公司的信息披露质量是重要的调节变量,提高上市公司信息披露质量能有效减弱股份回购对股票流动性的负向影响。本文结论有助于理解上市公司公开市场股份回购的微观影响机制,亦对监管部门制定股份回购监管政策具有启发作用。     

股票流动性对公司资本结构的影响研究

本文分析了流动性对公司资本结构的影响。理论分析表明,一个公司股权交易流动性的提高,使得公司股权融资成本得以降低,公司更倾向于采用增发、配股等股权融资的方式融资,这会降低公司的财务杠杆率。同时,借鉴资本结构动态调整的思想分析,发现个股流动性越高,资本结构的调整速度越快。本文基于2002—2010沪深两市发行的非金融业A股数据,采用面板数据回归等方法研究了股票流动性等因素对公司资本结构的影响,本文的经验结果支持这一理论假设。     

阳光私募是否改善了股价信息效率？

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。     

股票流动性与企业资本配置效率

本文从市场微观结构的角度,研究我国上市公司股票流动性和资本配置效率之间的经验关系,发现股票流动性有助于降低企业非效率投资,这种负相关关系具体表现为流动性有助于缓解投资不足并抑制过度投资;进一步研究表明,股票流动性主要通过降低代理成本和提升股价信息含量等机制改善资本配置效率。本文研究结论表明,只有继续优化股权结构与公司治理、规范信息披露制度并加强内幕交易打击力度,才能增强市场流动性并提高资本配置效率。     

股权分置改革与流动性定价问题研究

在中国经济体制改革已取得重大成效的今天,股权分置问题成为众多经济问题的根源和制约改革进一步深化的障碍,如何在维护股东利益和保持市场稳定的基础上审慎地解决股权分置问题成为了中国面临的巨大的智慧考验。我们认为,对流动性的分析与定价是中国资本市场股权分置改革的核心问题,其意义远大于其表面上的非流通股参与流通,同时也体现在促进金融创新和估值体系重建两个方面。本文不揣浅陋,着眼于流动性的理论依据,试图探讨如何利用衍生金融工具给股票流动性定价,以此来解决对价给付问题。     

考虑市场治理体系的银行债权治理及其效应研究——来自A股工业企业的经验证据

将银行债权、产品市场、经理人市场和公司控制权市场等机制作为市场治理机制,构成市场治理机制体系,采用深沪A股工业企业2006-2016年的数据,从检验中国市场化改革成效角度,以市场化体系中最为活跃的力量——银行债权为核心,考察其在市场化体系情境下对公司治理的作用机制及效应。研究发现:无论是否考虑市场治理体系,银行债权均发挥积极治理效应,且考虑体系时银行债权治理效应更强,动态优化幅度更大,优化趋势更明显;考虑体系时,除公司控制权市场外,银行债权与其他机制形成良性互动进而发挥积极的直接效应和间接效应,且直接效应占优。研究证明我国市场治理体系日益完善,市场化改革进程日益深化,但仍需进一步加大改革的力度。研究对肯定市场化改革成效,坚定市场化改革取向,进一步发挥银行债权治理效应,形成协同高效的市场治理体系和防范化解金融风险具有重要意义。     

企业环境信息披露影响因素实证分析:2010~2011年A股重污染行业上市公司观察

以2010～2011年A股重污染行业上市公司作为研究对象,从产品市场竞争、公司治理角度考察了企业环境信息披露的影响因素。结果显示：公司治理结构的合理安排能够对提升企业环境信息披露质量产生一定的积极作用,但是产品市场竞争与公司治理机制之间的关系尚不明确。本文的研究结论意味着,在我国当前的制度背景下,要提高企业环境信息披露水平,保护利益相关者利益,有必要继续完善上市公司治理结构;同时,本研究也说明产品市场竞争并不能解释重污染行业企业环境信息披露的动机。     

Corporate transparency and firm value: Does market competition play an external governance role?

We investigate whether market competition affects the relationship between corporate transparency and firm value in the United States using a sample of 12,665 firm-year observations, representing 1,644 individual firms for the period 1996–2018. The results show that stronger transparency enhances firm value, and market competition has a significantly positive effect on that relationship. More importantly, we use hierarchical linear models further to explore the cross-level interaction impact of market competition, and we find evidence suggesting that the industry-level competition has a significant cross-level moderating effect. Additionally, consistent with the substitute perspective, we also find that the disciplinary power of competition on the relationship between transparency and value is more pronounced for firms with weak corporate governance. Overall, our evidence supports the “bright side” of the competition view and highlights the active external governance role that competition plays in the value promotion effect of corporate transparency at both the individual and the industry levels.     

Corporate governance and the stock market reaction to new product announcements

This study examines the explanatory power of corporate governance mechanisms on the wealth effect of firms?? new product strategies. We show that board size, board independence, audit committee independence, CEO equity-based pay, analyst following and shareholder rights are all of significance in explaining the variations in the wealth effect of new product introductions. Our results reveal that the new product strategies announced by firms with better corporate governance mechanisms tend to receive higher stock market valuations than those of firms with poorer governance mechanisms. This study provides empirical support for the notion that enhanced governance mechanisms can reduce both agency and information asymmetry problems for firms announcing new products.     

Impact of corporate governance and related controversies on the market value of banks

Effective corporate governance of financial institutions, particularly in the banking sector, is vital for the stability of the financial system and the prevention of financial crises. Thus, this study examines the impact of corporate governance and related controversies on the market value of banks. For this purpose, we utilized Refinitiv’s corporate governance scores, including management, shareholder value, and corporate social responsibility (CSR), as well as its corporate governance controversies scores to analyze their impact on the market value of 242 banks in 43 countries. Using Refinitiv’s ESG database from 2017 to 2021, we conducted a path analysis and found a positive and statistically significant relationship between the CSR strategy scores and the market value of banks as well as between the management scores and the market value of banks. Moreover, there is a statistically significant relationship between the corporate governance controversies scores and the market value of banks.     

Corporate Governance,Product Market Competition,and the Wealth Effect of R&D Spending Changes

This article examines whether corporate governance and product market competition interact to affect the profitability of corporate research and development (R&D) investments. Firms announcing R&D spending changes experience positive and significant wealth effects, and these effects are mainly driven by good‐governance firms. Investors appear to view announcements of R&D spending changes undertaken by firms with stronger shareholder rights as evidence of value creation. Moreover, the favorable wealth effects are stronger for good‐governance firms in noncompetitive industries than in competitive industries, supporting the argument that good governance substitutes for product market competition.     

资本市场的完善，创新与国有企业改革

本文认为，国有企业改革的核心症结在于资本市场发展存在缺陷。国有企业改革要想取得实质性的进展，突破口就在资本市场。通过资本市场自身功能的完善和发展，既可以为国有企业开辟新的资金源，降低高负债率；又能通过完善企业的股权结构和法人治理结构，进而改善融资机构，提高国有企业的绩效；还能通过流动性功能的加强，促进企业产权重组。其核心是构建一个完善、成熟、规范的市场机制，实现资本资源的优化，高效配置，最终从微观的、供给的层面来促进经济增长。为此，需以资源配置为核心，完善资本市场的功能；以创新为动力，推动资本市场的全面发展。     

CEO Ownership,Stock Market Performance,and Managerial Discretion

We examine the relationship between CEO ownership and stock market performance. A strategy based on public information about managerial ownership delivers annual abnormal returns of 4% to 10%. The effect is strongest among firms with weak external governance, weak product market competition, and large managerial discretion, suggesting that CEO ownership can reverse the negative impact of weak governance. Furthermore, owner‐CEOs are value increasing: they reduce empire building and run their firms more efficiently. Overall, our findings indicate that the market does not correctly price the incentive effects of managerial ownership, suggesting interesting feedback effects between corporate finance and asset pricing.     

管理者能力与资本市场稳定

管理者能力是管理者有效率地利用企业资源创造价值的能力。本文以企业股价大幅下跌风险为切入点系统分析了管理者能力对资本市场稳定的影响。研究发现:管理者能力能够显著抑制企业未来股价大幅下跌的风险,具有市场稳定效应。这种稳定效应主要体现在管理者隐藏坏消息动机较强和隐藏坏消息空间较大(内部缺乏大股东治理和外部制度环境水平较低)的企业。进一步研究发现,管理者能力主要通过降低企业经营风险和提高企业治理水平等路径缓解企业未来股价大幅下跌的风险。本文丰富了管理者能力和股价下跌风险的研究,还对如何合理利用企业家资源维护我国资本市场平稳健康发展提供了重要的现实证据。     

Factors influencing corporate governance disclosures: evidence from Alternative Investment Market (AIM) companies in the UK

This study examines the relationship between company and ownership characteristics and the disclosure level of compliance with Quoted Companies Alliance (QCA) recommendations on corporate governance in Alternative Investment Market (AIM) companies. We report clear evidence that compliance increases with company size, board size, the proportion of independent non-executive directors, the presence of turnover revenue, and being formerly listed on the Main Market. However, we find that shell and highly geared AIM companies disclose relatively lower levels of corporate governance than recommended under QCA guidelines. Our findings suggest that market regulators should review the potential impact of the quality of corporate governance in these companies on the future vibrancy of AIM. We find no evidence that ownership structure or the type of Nominated Advisor is related to disclosure of compliance with QCA guidelines. Overall, in a lightly regulated environment such as the AIM market, it seems that companies will ultimately pursue a cost–benefit strategy in voluntarily complying with good corporate governance practice.