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深圳A股市场警示性停牌对股票换手率的影响

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摘要 本文使用深圳A股市场2009~2011年的警示性停牌和交易数据,通过事件研究法分析了警示性停牌停牌前后股票换手率的异常变化。对于异常波动停牌,中小板更易遭受市场过度炒作,但是更能有效地冷却投资者的非理性交易热情;复牌后3天,异常换手率虽有较大的下降,但仍比未停牌股票大得多。对于重大事项停牌,停牌前有严重的"信息泄露";复牌后异常换手率下降的速度较慢。事件窗内,中小板由于盘子小、不确定性更高,对警示性信息的反应幅度更大。综上所述,警示性停牌的实施效果是非常有限的。
作者 王博
出处 《时代金融》 2014年第1Z期112-114,118,共4页 Times Finance
基金 教育部哲学社会科学研究后期资助项目(项目批准号:09JHQ016)
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