经济政策不确定性影响下的股权质押与上市公司市值管理
2020-09-22陈浩
陈浩



摘要:市值管理是企业避免股价异常波动、为股东创造价值的重要手段。从股权质押的角度对沪深A股上市公司市值管理行为进行研究,结果表明股权质押激发了上市公司进行市值管理,进一步考虑经济政策不确定性的影响,发现经济政策不确定性会减弱股权质押对市值管理的影响,并且在不确定性较高时期,不利于上市公司的市值管理行为。另外,进一步分析发现,由于国有企业较民营企业具有较弱的市值管理动机,其股权质押行为会降低市值管理的有效性。当股权质押资金投向控股股东自身或第三方时,其市值管理有效性显著弱于投向被质押上市公司。
关键词:市值管理;经济政策不确定性;上市公司;面板回归模型
Abstract: Market value management is an important means for companies to avoid abnormal stock price fluctuations and create value for shareholders. Research on the market value management behavior of Shanghai and Shenzhen A-share listed companies from the perspective of equity pledges. The results show that equity pledges have stimulated listed companies to conduct market value management. Further considering the impact of economic policy uncertainty, it is found that economic policy uncertainty will weaken the impact of equity pledge on market value management, and in periods of high uncertainty, it is not conducive to the market value management behavior of listed companies. In addition, further analysis found that because state-owned enterprises have a weaker market value management motivation than private enterprises, their equity pledge behavior will reduce the effectiveness of market value management. When equity pledge funds are invested in the controlling shareholder itself or a third party, its market value management effectiveness is significantly weaker than that in the pledged listed company.
0 引言
2005年股權分置改革之后,市值管理开始受到利益相关者和监管部门越来越广泛的关注。2014年5月,国务院在《关于进一步促进资本市场健康发展的若干意见》中首次明确“鼓励上市公司建立市值管理制度”,市值管理使上市公司保持与资本市场的沟通与互动,避免股价的异常波动,维持市值的稳定,能够实现与战略目标的匹配,所以从理论上来说,市值管理不仅对公司控股股东以及其他利益相关者也都具有非常重要的作用。有效的市值管理还能促进内在价值和外在价值基本保持一致,防止市值虚增,维持资本市场的良性发展(宋岩和宋爽,2019)。
近年来,随着资本市场的发展,股权质押融资工具由于其成本低、效率高、流动性好等优势明显,越来越受到上市公司的青睐,特别是当控股股东具有较大资金需求的时候。……
