香港人民币债券发行的公告效应及其影响因素研究

本文以2007年7月至2011年8月在香港发行人民币债券的74家公司发行的87支离岸人民币债券为研究对象,运用事件研究方法对这些离岸人民币债券发行的公告效应及其影响因素进行了实证研究。结果表明,在我们研究的事件窗口中,在香港发行人民币债券会对公司股价产生显著为负的公告效应,此效应近似等于我国公司在国内股权融资所产生的公告效应,小于可转债和公司债发行时所产生的效应。横截面的数据回归分析表明,股票的累计异常收益率与公司的规模、信用评级和债券的相对规模成正相关关系,与债券的期限、公司的固定资产比率、负债率和成长性不存在显著的相关关系。     

经济依赖度、盈余管理水平与审计独立性——来自上市商业银行的经验证据

以2001～2010年我国上市商业银行为研究对象,从盈余管理的角度,以异常贷款损失拨备作为审计独立性的代理变量,以未预期费用作为经济依赖的代理变量,验证了审计师在银行业的经济依赖对审计独立性的影响.研究结果表明,未预期审计费用、总费用和非审计费用率对异常贷款损失拨备没有显著影响,而未预期非审计费用则对异常贷款损失拨备具有显著的负向影响.总体而言,审计师在为上市商业银行提供业务过程中,过高的经济依赖,促使其接受了客户的盈余管理偏好,审计独立性受到损害.     

股改对流通股股东财富影响的实证研究

我国股市的二元制结构在长期中对证券市场造成了很多的困扰,其中最大的问题是使得证券二级市场的风险增高,从而流通股股东承担着相对过高的成本.2005年4月开始,股权改革开始坚决地实施,本文就股改的结果做出实证检验,发现在股改改后的一段时间里流通股股东利益得到了补偿,并且股改的对价方案对流通股股东的利益影响是最大的.     

投资者面临泡沫的理性行为:抛售、旁观还是骑乘?

关于投资者面临泡沫时的行为,学术界存在截然不同的三种观点:抛售、旁观和骑乘。本文构建了一个仅需基本信息的、适用于一般投资者的泡沫识别模型,以1996年5月至2010年12月的数据为样本识别泡沫,在此基础上分析泡沫期之后的崩溃风险,并测算投资于泡沫期之后的超额收益,探寻当期识别到泡沫与下一期标准化的超额收益之间的关系。结果表明,崩溃与泡沫没有必然联系,投资者面临具有极端收益的泡沫时的理性行为是骑乘泡沫。     

国内上市公司并购效应实证研究

本文以2006年在我国证券市场上发生控股权转移的并购案例为样本进行实证研究,结果发现:并购在短期内为目标公司创造了价值,给股东带来较高的超额收益,但是在较长时间内,公司价值有受损的可能;同时在正式信息披露日前,存在信息泄漏的现象;在影响目标公司价值变化的因素中,上市公司所属行业、并购双方的关系、交易股权数都对公司并购的绩效有一定的影响.     

资金异常流动监测中资金流速与特征研究

资金异常流动监测一直是反洗钱工作的核心组成部分,而监测工作的目的在于将非法的资金流动速率限制在一定的范围内。本文对现行反洗钱法规中所内含的监测标准进行了量化工作;还针对现有监测约束条件下资金异常流动活动中金额与时间、账户数等参数之间的关系进行了分析,确定了一定条件下资金流动绝对上限。最后本文对洗钱者可能呈现出的新特征进行了分析与设想。     

异常审计收费与审计质量的损害——来自中国审计市场的证据

中国上市公司是否成功地通过许以更高的审计收费购买审计意见呢？本文以2001--2002年上市公司作为研究样本,考察了这些上市公司随后年度审计意见的改善情况与异常审计收费的关联关系,结果发现：异常审计收费与上市公司不利审计意见的改善显著正相关,不过,与预期相反,在上市公司提高审计收费的情况下,内资会计师事务所相比外资会计师事务所更少的允许上市公司改善审计意见。同时,异常审计收费的存在显著损害了会计盈余的价值相关性,上述证据意味着中国上市公司成功的通过审计收费的提升购买了审计意见。     

Do insiders trade on innovation?

We find that pure insider share purchases—which we define as insider purchases over two successive years without any corresponding sales—are a strong predictor of a firm’s patent applications. The predictability increases with the quality of the patent: Applications for the highest-quality, breakthrough patents increase by 21% in the year following pure insider purchases in our sample. These purchases are associated with large abnormal stock returns of 1.1% per month (14% annualized) over the subsequent three-year period. We also document that stock price responds less to the subsequent announcement of the grant of patent if the application for the patent has been preceded by pure insider purchases, consistent with the idea that insider purchases reveal information about future firm innovation. Our evidence has implications for understanding insider trading within technology companies that have become a dominant feature of US stock markets in recent decades.     

Investors' evaluations of price-increase preannouncements

Several firms preannounce their price increases with the expectation that such announcements will be evaluated favorably by investors. However, little is known about the actual effect they have on shareholder value. Accordingly, the authors present the first systematic empirical examination of investors' evaluations of 274 price-increase preannouncements (PIPs). Results show that whereas the average increase in abnormal returns following a PIP is 0.51%, almost 41% of the PIPs result in negative abnormal returns. To explore this heterogeneity, the authors propose a conceptual framework that focuses on three key pieces of information that investors can use when evaluating a PIP: information on the nature (time to implementation and magnitude) of the preannounced price increase, the stated attribution for the preannounced price increase (demand and/or cost based), and information on prior PIP occurrences by the firm and its competitors. Results indicate that PIPs with greater time to implementation, higher own precedence and greater competitive precedence result in lower abnormal returns, while PIPs with higher magnitude and PIPs with an explicit demand attribution result in greater abnormal returns.     

The effect of customer service on retailers’ shareholder wealth: The role of availability and reputation cues

Retailer customer service has been shown to lead to increases in consumer attraction and retention, but what is less apparent is whether shareholders are fully rewarded for retailers’ customer service efforts. Results from an event study on 48 retailer announcements of customer service strategies indicate that customer service increases retailer market values by 1.09 percent on average. The magnitude of this abnormal return suggests that customer service is one of the more effective ways for firms to create shareholder wealth. Further, analysis of the abnormal returns suggests that the shareholder value created by the retailer's customer service is affected by the heuristics and cues used to judge the likelihood of service delivery. Consistent with the availability heuristic, we find that services that are difficult to bring to mind and non-vivid services create significantly less shareholder value. Results further show that the retailer's reputation can also significantly inhibit the customer service's shareholder wealth creation.