Standardized residual method solves the problem that the change in volatility, which is caused by control transfer, has negative effect on statistical results. The abnormal change in stock volume is analyzed during the event window around the announcement on control transfer. 采用的标准化残差方法克服了事件研究中因控制权转移事件引起的股价波动性变化对统计结果的影响,同时分析了在控制权公告期内股票成交量的异常变化。