ESG评级分歧与股价同步性

被引:179
作者
刘向强 [1 ]
杨晴晴 [1 ]
胡珺 [2 ]
机构
[1] 西南大学经济管理学院
[2] 海南大学管理学院
关键词
ESG评级分歧; 股价同步性; 噪音效应; 信息不对称;
D O I
暂无
中图分类号
F832.51 []; X322 [部门环境规划与管理];
学科分类号
083001 [环境科学];
摘要
随着对可持续发展的日益重视,ESG评级结果已经成为投资者进行决策时的重要参考,但目前国内外各ESG评级机构的评级结果各异,存在较大分歧。以2015—2021年中国A股上市公司为样本,使用商道融绿、和讯、润灵环球和彭博4家评级机构的评级结果构建ESG评级分歧衡量指标,实证检验了ESG评级分歧对股价同步性的影响。研究发现:ESG评级分歧显著提高了被评级企业的股价同步性,表明ESG评级分歧存在“噪音效应”。在经过一系列稳健性检验后结论依然成立。进一步研究发现:ESG评级分歧对股价同步性的正向影响在于加剧了市场信息不对称;当上市公司信息环境较好,以及投资者具备较强的信息解读和分析能力时,可以缓解ESG评级分歧产生的“噪音效应”。研究结论为监管机构规范ESG评级标准,推动资本市场定价效率提升提供政策建议。
引用
收藏
页码:108 / 120
页数:13
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