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超常收益率
    5th, analysis influence factor of abnormal return of rename stocks in 2000 and 2001, discovering abnormal return is not obvious relevance with company's management achievement, year, the different exchange, but hasremarkable inverse correlation with company scale and company's stock price.
    5、对2000年和2001年的更名股票的超常收益率影响因素分析,发现超常收益率与公司的经营业绩、年度、不同交易所没有明显的相关性,与公司规模和公司的股价显著的负相关。
    Equity Financing and Cumulative Abnormal Return
    配股融资与股票超常收益率
    This paper empirically analyzed the effect of the cash dividend and stock dividend on stock price through Cumulative Abnormal Return (CAR) method.
    本文利用累计超常收益率方法,从实证角度分析了上市公司派发现金股利和股票股利对股票价格的影响。
    The writer compares the respond of high cash dividend with that of low cash dividend, the cumulative abnormal return(CAR) as the index, finding that the responds of the two styles are completely different.
    作者将高派现和低派现两种风格的市场反应作了比较,以累计超常收益率作为衡量指标,发现市场对两类派现的反应截然不同。
    The paper uses the abnormal return to measure the announcement effect with market-adjusted returns method over a two-day period, and get the result of the significant negative 2.289%, which approves the announcement effect also occurs in China.
    在此基础上,选择1998. 1. 1-2004. 4. 30期间成功增发新股的上市公司为样本,采用风险市场调整模型,对增发公告当日的超常收益率进行检验,得出-2. 289%的显著负价格效应,证实了我国上市公司同样存在增发公告负效应。
    At last we establish a linear regression model, influence factors as independent variable and abnormal return on the announcement day as dependent variable. The result shows free cash flow the proportion of none-current stock subscription ratio of the previous shareholders discount rate and the cumulative abnormal return in the previous 20 days before announcement have significant positive effect on AR on the announcement day.
    最后,本文以增发公告日股票的超常收益率为因变量,对我国增发公告效应的影响因素进行线性回归,发现货币资金及短期投资、非流通股比例、向原流通股股东配售比、折扣率及公告前20个交易日内累积超常收益率对公告日的超常收益率的影响显著。
    Based on the punishment information of China Securities Regulatory Commission on stock-price manipulation,by researching systemically manipulation objections,manipulators and their behaviors,this paper studies the characters of these aspects and shows that manipulation behaviors can be forecasted or monitored by abnormal trading volume and abnormal return.
    以中国证监会对股价操纵的处罚决定为依据 ,对操纵特征和操纵效应进行了系统的实证研究 ,发现操纵主体、操纵客体以及操纵行为都具有明显特征 ,日平均超常成交量对操纵行为具有适时预警作用 ,日平均超常收益率对操纵行为具有事后检测作用 .
 

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