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金融研究  2015, Vol. 423 Issue (9): 174-189    
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媒体语气、投资者情绪与IPO定价
汪昌云, 武佳薇
中国人民大学中国财政金融政策研究中心/财政金融学院,北京 100872
Media Tone, Investor Sentiment and IPO Pricing
WANG Changyun, WU Jiawei
China Financial Policy Research Center/School of Finance, Renmin University of China
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摘要 本文利用IPO公司在上市前不同时间段内主流财经媒体报道中的正负面词汇数据,构建了媒体语气这一度量公司层面投资者情绪的代理变量,从个股层面检验投资者情绪对IPO抑价率的影响。本文研究结果表明,相比正面媒体语气,负面媒体语气能够更好地解释IPO抑价率、首日换手率以及超募比例。具体而言,我们发现负面媒体语气与IPO抑价率、IPO超募资金比例以及承销商费用占比均显著负相关:负面语气每下降1%,IPO抑价率上升0.22%,超募资金比例提高0.13%,承销商费用占比上升1.44%。我们进一步发现发行公司和承销商有动机和激励通过媒体推介IPO公司,引导、煽动投资者情绪,从而厘清投资者情绪的影响因素以及其作用于资产价格的渠道。本文最后验证了媒体语气作为投资者情绪代理变量的可靠性。
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汪昌云
武佳薇
关键词:  媒体语气  投资者情绪  IPO抑价率    
Abstract:  This paper examines IPO firms' media tone during a particular time window in the IPO process as a proxy for investor sentiment at firm level, and analyzes how investor sentiment affects IPO underpricing. Consistent with existing literatures, negative media tone tends to have more robust explanation for IPO performance. In particular, we find that negative media tone is negatively and significantly related to IPO underpricing, over_funding ratio and underwriters' proceeds_ratio: negative media tone increases by 1%, underpricing decreases by 0.22%, over-funding ratio drops by 0.13%, and underwriting proceeds_ratio drops by 1.44% on average. We further show IPO firms and underwriters have strong incentives to promote IPO firms, which constitutes a driving factor of investor sentiment. We finally test the robustness of media tone as a proxy for investor sentiment.
Key words:  Media tone    Investor sentiment    IPO underpricing
JEL分类号:  G14   G30   G32  
基金资助: *本文感谢国家社科基金重点项目(11AZD094)的资助。作者感谢第一届中国财务与会计学术年会审稿人的意见和建议,感谢匿名审稿人的宝贵意见。文责自负。
作者简介:  汪昌云,金融学博士,教授,中国人民大学财政金融政策研究中心,Email: wangchy@ruc.edu.cn. 武佳薇,博士研究生,中国人民大学财政金融学院,Email: wjw7251@163.com.
引用本文:    
汪昌云, 武佳薇. 媒体语气、投资者情绪与IPO定价[J]. 金融研究, 2015, 423(9): 174-189.
WANG Changyun, WU Jiawei. Media Tone, Investor Sentiment and IPO Pricing. Journal of Financial Research, 2015, 423(9): 174-189.
链接本文:  
http://www.jryj.org.cn/CN/  或          http://www.jryj.org.cn/CN/Y2015/V423/I9/174
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