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异常收益率
    The abnormal return for Initial Public Offering (IPO) is a long-term hot issue which is debated by researchers both in China and at abroad, this issue mainly includes the initial underpricing and the long-term poor performance. In the foreign literatures, the researchers only focused on the behavior analysis for market participants while the impact of offering system is often neglected.
    首次公开发行新股(Initial Public Offering,简称IPO)异常收益率现象一直是国内外关注的热点问题,该现象主要包括初始抑价和长期弱势。
    2) During the term of test, the trend of six portfolios reverse, most of daily return being negative, and cumulate abnormal return being prominently negative, which is suited with our noise trading model.
    第二,在事件检验期,六种组合的走势突然反转,日异常收益率绝大部分为负数,累积异常收益率显著为负,与本文噪声交易模型的结论非常吻合。
    Regarding these factors as independent variable and abnormal return (AR) on announcement day as dependent variable, we establish a linear regression model.
    并选取适当的变量代表这些因素,以增发公告日股票的异常收益率为因变量,建立了多元线性回归模型。
    (2) In 1999-2001, AR(abnormal return) is negative between the declaration date.
    (2)我国近三年来上市公司在发布高额分红公告的前后,流通股股东的异常收益率为显著负值,证明现金分红的增长将损害流通股股东利益;
    By doing parametric test of the distribution of abnormal return, the paper demonstrate that the semi-strong form of the EMH does not hold in China stock market.
    通过对事件发生前后异常收益率的分布情况进行参数检验,得到了中国股市非半强式有效的结论。
    This paper examines index effects of Shanghai Stock 50 Index using indexreplacements information by January 2006. The empirical results show that, whencomposite stock enrolls index, at announcement day abnormal return rate is consistentwith anticipated income return, but ratio is on the small side.
    选取上证50指数自发布之日至2006年初以前的四次调整作为样本,利用事件研究法对指数调整的价格效应和成交量效应进行了实证研究。 研究发现,成份股加入指数,在公告日出现了与预期一致的异常收益率,但比率较小,可能是和我国指数衍生产品规模较小有关。
    U- sing event study methodology,this paper tests whether stra- tegic alliance formation announcements create shareholder value. The sample consists of 90 announcements in China stock markets from 2002 to 2006.Further,relationships be- tween cumulative abnormal return and firm size and industry type are also tested.
    本文采用事件研究方法,针对2002至2006年的90个战略联盟宣告进行实证分析,检验战略联盟的宣告对股东财富的是否存在正向影响,进而研究公司规模和科技含量与累积异常收益率的关系。
    We find that the change of executive's compensation is significantly positively correlated with corporate performance of the current year and instably positively correlated with the change of corporate performance, the executive's average compensation increases by only RMB 3.8 with the shareholder's value increasing by RMB 1,000,000, the executive's average compensation increases by 1.58% with the firm's abnormal return rate increasing by 10%.
    我们发现,上市公司高管报酬的变化与当年的会计绩效显著正相关,但与会计绩效的变化之间的关系不稳定,上市公司股东价值每增加100万元,高管平均报酬仅增加3.8元; 上市公司市场异常收益率每增加10%,高管平均报酬增加1.58%。
    The study finds that market response positively to the release of the reform information,cumulative abnormal return is positive,and the extent of response is significantly positive with the ratio of presenting shares and insignificant with the proportion of non-circulate shares.
    研究结果表明:市场对此反应积极,期间累计异常收益率为正,且市场反应程度与公司送股比例显著正相关,而与非流通股比例无关。
 

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