东北大学学报(社会科学版) ›› 2020, Vol. 22 ›› Issue (1): 22-30.DOI: 10.15936/j.cnki.1008-3758.2020.01.004

• 经济与管理研究 • 上一篇    下一篇

股价特质性波动视角下我国是否应放开回转交易制度?——基于A/B股分行业的准自然实验证据

李竹薇,付媛,颜胜男   

  1. (大连理工大学经济管理学院,辽宁大连116024)
  • 收稿日期:2019-05-15 修回日期:2019-05-15 出版日期:2020-01-25 发布日期:2020-01-19
  • 通讯作者: 李竹薇
  • 作者简介:李竹薇(1983-),女,辽宁抚顺人,大连理工大学副教授,经济学博士,主要从事金融工程、风险管理、行为金融、资本市场研究。
  • 基金资助:

    国家社会科学基金青年资助项目(17CJY060)。

Should China Liberalize the Rotary Trading System from the Perspective of Stock Price Idiosyncratic Volatility?——Evidence from a Quasi-natural Experiment Based on the A/B Shares and Sub-industries

LI Zhu-wei, FU Yuan, YAN Sheng-nan   

  1. (School of Economics and Management, Dalian University of Technology, Dalian 116024, China)
  • Received:2019-05-15 Revised:2019-05-15 Online:2020-01-25 Published:2020-01-19
  • Contact: -
  • About author:-
  • Supported by:

    -

摘要:

选取我国A/B股总体和分行业的两阶段日数据作为准自然实验的样本数据,采用Fama-French五因子模型和DMYZ模型衡量股价特质性波动并构建双重差分模型,研究回转交易制度变更对股价特质性波动的影响作用,探求我国是否应全面放开回转交易制度。研究结果表明:总体上,在T+0回转交易制度下A股的股价特质性波动明显小于B股,但在T+1回转交易制度下A股和B股特质性波动相差不大;T+0回转交易制度提高了股价特质性波动,而T+1回转交易制度降低了股价特质性波动;分行业研究发现,除交通、信息、租赁行业不敏感之外,其余行业对不同回转交易制度的反应与总体一致。因此,出于稳定市场考虑,不建议我国现阶段全面开放回转交易制度,但可以A股市场的蓝筹股为试点,在股市整体进一步成熟稳定后再考虑逐步放开回转交易使其与国际制度接轨。

关键词: 回转交易制度, 股价特质性波动, 准自然实验, 双重差分模型, Fama-French五因子模型

Abstract:

The two-stage daily data of China's A/B stocks and sub-industries are selected as sample data of the quasi-natural experiments. The Fama-French 5-factor model and DMYZ model are used to measure the stock price idiosyncratic volatility and construct the difference-in-difference models. The effect of the change of rotary trading system on stock price idiosyncratic volatility is studied to explore whether China should fully liberalize the rotary trading system. The results show that in general, the stock price idiosyncratic volatility of A shares is obviously less than that of B shares under T+0, but they are similar under T+1; T+0 raises the stock price idiosyncratic volatility, while T+1 reduces the idiosyncratic volatility. Through further examination of the sub-industries, it is found that except for the transportation, information, and leasing industries, which are not sensitive, the rest of the industries have the same reaction to the different rotary trading systems. Therefore, from the perspective of market stability, it is not recommended that China completely liberalize the rotary trading system at this stage. Instead, Blue Chips of A shares can be used as a pilot, and after the stock market is further matured and stable, it can be considered to gradually liberalize the rotary trade and bring it into line with the international system.

Key words: rotary trading system, stock price idiosyncratic volatility, quasi-natural experiment, difference-in-difference model, Fama-French 5-factor model

中图分类号: