股权分置改革前后A股IPO初始收益率的比较研究

A Comparative Study on IPO’s Initial Returns in A Share Market between Pre-reform of Equity Division and Post-reform

本文采用股权分置改革前后的新股样本数据,对影响我国A股初始收益率的相关因素展开实证分析。研究发现,股权分置和发行管制是造成股权分置改革前A股IPO市场高初始收益率的根本原因,而在股权分置改革后,由于发行继续受到严格管制和投资者旧有定价理念及盈利模式的延续,新股的初始收益率仍然存在继续高企的制度基础和市场条件。因此,在股权分置改革后,管理层应进一步推进发行监管制度改革,实现股票供给市场化。

The paper empirically analyzes the factors affecting the A share initial returns through the sample data before and after the Reform of the Share Splitting. The results show that the share splitting and the issue regulatory are the essential reasons to cause the high initial returns of the A shares before the reform of the share splitting. After the share splitting reform, the initial returns of the A share are high because of the system basis and the market condition. Therefore, the management administration ought to reform the issuing supervision system and make the stock supply adjusted by market.