股权激励对股票价格的短期效应

应用事件研究方法分析上市公司股权激励的董事会预案对股票价格的影响,并辅与股票平均成交量比率继而分析其对股票成交量的影响。实证结果发现在上市公司董事会首次审议通过股权激励计划的公告日,股票价格上涨,成交量提升,价量均具有显著的正变化。     

支付方式、关联并购与收购公司股东收益

文章从信息不对称理论出发,结合中国并购活动中的关联性特征,研究支付方式对收购公司股东收益的影响.选取我国上市公司收购非上市公司的569个事件为研究样本,采用事件研究法进行实证分析.实证结果表明股改后中国并购交易中收购公司股东获得正的超常收益;采用股票支付时收购公司股东收益显著为正,而现金支付对收购公司股东收益没有显著影响;关联并购比非关联并购能够为收购公司创造更大收益,关联并购中股票支付的股东财富提升更为显著,但是对于股权高度集中的收购公司就没有显著的正财富效应.     

我国房地产上市公司定向增发的股价效应研究

利用事件研究法,选取2013年我国A股房地产上市公司定向增发事件作为研究对象,观察在定向增发前后10天的股票超额收益。研究发现,我国房地产公司定向增发公告日前3天即开始显现显著的正向股价效应,表明我国房地产上市公司定向增发信息被提前泄露。公告日后,累积超额收益呈下降趋势。     

两种股权激励方式的特征、应用与证券市场反应的比较研究

本文对股票期权和限制性股票的两种激励方式从权利义务、估值、会计、税收等多角度进行剖析,并对最近3年中国上市公司的股权激励实践进行了总结分析。研究发现,公司偏好选择股票期权,两种激励方式的主要行业选择没有差异,但股票期权的行业分布较为广泛。运用事件研究法比较两种激励信号的证券市场反应后,发现证券市场对限制性股票的股价公告效应并不明显,而股票期权的公告效应十分显著。本文认为应该在政策上引导和鼓励上市公司选择限制性股票的激励方式。     

中国上市公司违规处理信息提前泄露了吗——来自股票流动性和融券交易的证据

本文从股票流动性和融券交易的视角出发,实证检验我国上市公司违规处理信息提前泄露的可能性。研究发现:(1)违规处理公告之前,股票超额非流动性水平和超额融券量显著为正,且与违规处理公告日的超额收益率显著负相关;(2)公告日超额收益率最低组股票的公告前超额非流动性更高,而公告日超额收益率最高组股票的公告前超额融券量更少;(3)当违规处理文件的下批日期与公告日期间隔超过10日时,公告日超额收益率较高的公司股票,其公告前的相对超额融券量显著减少,表明知情交易者占据了主导地位,处理公告的提前泄露更可能解释以上发现。本文的结果表明,监管部门应加强内部管理和提升工作效率,及时公布违规公司处理文件以减少信息提前泄露的可能性,从而有利于股票市场的健康发展。     

公司重组与股市反应

本文选取了2014年~2018年间沪深两市上市公司股票收益率作为研究样本,采取事件研究法考察我国股市对于公司重组声明的反应。分析表明,我国股市对于公司重组声明的反应较为积极,事件发生后的超额收益率和累积超额收益率都显著为正。这意味着公司重组这一事件向市场传递了关于公司的积极信号。本文结论对于投资者和市场管理者都具有一定的参考性。     

我国银行业海外并购股东财富效应研究--基于2006-2013年数据的实证分析

文章采用事件研究法探讨我国商业银行海外并购是否为股东创造了财富。以2006年-2013年16起银行业跨境并购为样本，研究发现并购公告影响了股票的波动，但短期并没有显著提高股东财富。本研究同时还对子样本进行了检验，发现并购事件对单个银行股东财富是具有显著影响的，短期内产生的负超额收益偏多，说明我国银行海外并购风险较大，需加大力度进行银行间整合以使效益越来越好。     

现金股利与股票回购公告效应比较研究

本文采用事件分析法,在计算异常收益的基础上分别研究了现金股利和股票回购公告的市场反应,发现在我国资本市场上二者均具有明显的公告效应,且二者的公告效应具有极大的相似性,不仅具有提前反应的现象,在研究的事件时间窗口内有相似的阶段性特征,而且市场反应的程度也无差异,这些表现说明现金股利与股票回购在我国A股市场上具有一定的替代效用。     

牛熊市里除权除息的差异收益率研究

在"牛市"和"熊市"里,除权除息事件能带来不同的收益率。本文以上海证券交易所开业以来至2007年5月31日的所有A、B股日交易数据为样本,将其按牛市或熊市划分为四个波段,采用事件研究法研究股票发生除权除息事件与事件日前后累积超额收益率之间的关系,发现在牛市里,在除权除息日前购买并持有分红送配的股票能获得显著的正收益,而在熊市里则应该在除权除息日前把股票卖出,研究结果为投资服务起到一定的指导作用。     

管理层人口特征、股权结构与股权激励契约设计——基于高层梯队理论与代理理论的整合视角

文章基于高层梯队理论与代理理论的整合视角，选取2006—2018年首次公告实施股权激励计划的A股上市公司作为研究样本，采用年龄、教育背景和任期指标来表征管理层人口特性，研究了管理团队人口特征、股权结构与股权激励契约设计之间的关系。研究发现，管理团队人口特征显著影响股权激励契约设计，年龄大、教育水平低、任期短的管理层更可能被授予股票期权，年龄轻、教育水平高、任期长的管理层更可能被授予限制性股票。研究还发现，股权结构对管理团队人口特征与股权激励契约模式选择之间的关系具有调节效应，高股权集中度和非国有控股能够强化管理层年龄、教育水平、任期与股权激励契约模式选择之间的相关关系，即在高股权集中度和非国有控股的公司，管理层年龄越大、教育水平越低、任期越短，选择股票期权激励契约模式的可能性更大。文章的研究结论为如何基于管理层人口统计学特征的偏好和委托代理关系中职位的偏好，设计最优股权激励契约模式提供了有益的启示。     

Market valuation of marketing alliances in East Asia: Korean evidence

This paper investigates firm value created by non-equity marketing alliance announcements of Korean listed firms in terms of stock price reactions to the announcements. We find evidence that on the Korean stock market, the announcements of marketing alliances produce significant positive abnormal returns, which reflect an increase in firm value, around the announcement date. This suggests that firm managers need to seek for various marketing alliances not only for an effective competition in competitive business environments but also for enhancement in shareholder wealth. The increase in firm value has inverse relationship with firm's size and growth opportunity. In particular, marketing alliances with firms based in G7-countries create greater firm value than ones with firms based in the home country. Our study provides investors, firm managers, and academics with valuable implications of an importance of marketing alliances for valuation of firms in other Asian countries as well as in Korea.     

Information asymmetry and investor trading behavior around bond rating change announcements

This study examines stock market reactions to public announcements (corporate bond rating changes), including changes in stock prices and investor behavior in terms of trading volumes and patterns. Abnormal returns, abnormal volumes, and net order imbalances are estimated using high-quality stock transaction data from Korean firms, whose bonds were rated by Korea's leading credit rating agencies between 2000 and 2015. We find positive (negative) abnormal stock returns around upgrades (downgrades), although the stock price reactions to downgrades are more statistically significant than those to upgrades. Significant abnormal volumes and order imbalances are found around rating changes, and the extent to which each investor group (domestic individuals, domestic institutions, or foreign investors) reacts to a rating change varies. Our analyses also support that foreign and domestic institutional investors are better informed than individual investors.     

Have Supermarket Mergers Raised Prices? An Event Study Analysis

Antitrust enforcement of supermarket merger activity during the late 1980s and early 1990s was less stringent than it had been before or has been since. For six announcements of supermarket acquisitions during this period, this study examines the abnormal stock returns of rival firms to determine if investors believed these acquisitions would lead to higher retail prices.These abnormal returns imply that investors expected that the average retail price change associated with these types of acquisitions ranges from a 0.12% decrease to a 0.05% increase. Thus, our results suggest that investors generally did not view these acquisitions as anticompetitive.     

Saddled with Attention: Overreaction to Bankruptcy Filings

We analyze the effect of investor attention on stock prices around Chapter 11 bankruptcy filings. We measure investor attention as abnormal search volume from Google, and find that attention‐grabbing companies have more negative abnormal stock returns in the days before and during bankruptcy filings and more positive abnormal returns immediately thereafter. That is, for companies receiving high attention, investors overreact to a bankruptcy filing; for companies receiving low attention, they underreact. This pattern is more pronounced for companies with low institutional ownership and holds after controlling for standard predictors of stock performance during bankruptcy.     

Innovation source,advancement stage and company stock returns

The purpose of this paper was to measure the short- and long-term impact of innovation announcements on the stock returns of service companies. In order to study the predictors of the abnormal stock returns, the study takes the adoption and diffusion theory as its conceptual background. The research was based on an event study and buy-and-hold methods. It encompassed 398 announcements released for 121 companies in EU member states between February 2011 and December 2016. The study deepens the dialogue on the role of the source of innovation and its advancement stage. It indicates a positive market reaction to high innovation advancement stage announcements in comparison to low advancement stage ones. Furthermore, it suggests a positive market reaction to in-house development in comparison to collaborative development and copying. Finally, the research signals that the innovation advancement stage complements its source by clarifying its relationship with abnormal market value changes.     

International investors’ reactions to cross-border acquisitions by emerging market multinationals

How do international investors react to announcements of cross-border mergers and acquisitions (CM&As) by emerging market multinational enterprises (EMNEs)? Using a unique and manually-constructed firm-level dataset, this paper examines the stock price reactions to CM&A announcements made over the period 1991–2010 by Chinese MNEs listed on the Hong Kong Stock Exchange and the wealth impacts of their corporate governance. Our empirical findings confirm a positive stock price reaction on average, and suggest that international investors react positively to the presence of large shareholders, but negatively to the presence of institutional shareholders. There is a negative impact if the largest shareholder is either the State or the corporate founder. We suggest that this is because the international investors perceive potential principal–principal conflicts in such ownership/control constellations and discount equity prices accordingly. We also find that Board size and independence have positive effects on the price reaction, but that large supervisory boards engender negative reactions.     

The conditional relationship between beta and returns: recent evidence from international stock markets

The risk–return relationship is one of the fundamental concepts in finance that is most important to investors and portfolio managers. Finance theory argues that the beta or systematic risk is the only relevant risk measure for investors. However, many studies have showed that betas and returns are not related empirically, no matter in domestic markets or in international stock markets. This paper examines the conditional relationship between beta and returns in international stock markets for the period from January 1991 to December 2000. After recognizing the fact that while expected returns are always positive, realized returns could be positive or negative, we find a significant positive relationship between beta and returns in up market periods (positive market excess returns) but a significant negative relationship in down market periods (negative market excess returns). The results are robust for both monthly and weekly returns and for two different proxies of the world market portfolio. Our findings indicate that beta is still a useful risk measure for portfolio managers in making optimal investment decisions.     

Fallout from the Mutual Fund Trading Scandal

In September 2003, several prominent mutual fund companies came under investigation for illegal trading practices. Allegations suggested these funds allowed certain investors to profit from short-term trading schemes at the expense of other investors. Surprisingly, regulatory authorities have known for more than two decades of the potential for such abuses, yet have taken limited steps to correct the problem. We explore investor reaction to the scandal by measuring assets under management, stock returns, and performance. Mutual funds managed by investigated firms show a substantial decline in post-announcement assets under management. These firms also experienced significantly negative announcement-period returns. Finally, we discuss several policy suggestions to prevent future trading abuses and provide direction for future research.     

Stock Market Reaction to Quality,Safety, and Sustainability Awards in Logistics

Although quality, safety, and sustainability are important concerns in logistics, managers are sometimes reluctant to invest in these areas because it is not always clear how such investments will benefit firm performance. Empirical literature provides little guidance in the context of logistics as previous studies report mixed findings across a diverse set of industries, which may not be directly applicable to logistics. To address this gap, we conducted an event study to estimate the stock market reaction to quality, safety, and sustainability award announcements in logistics. Based on 244 award announcements during the period 2004–13, we found that stock market participants react positively to announcements of these awards. The market reaction appears to be stronger for sustainability awards than for quality and safety awards. Our results also suggest that the market reacts more favorably to quality and sustainability award announcements for firms with better past financial performance and for smaller firms.     

Asymmetric Post-Announcement Drift to Good and Bad News: Evidence from Voluntary Trading Disclosures in the Chinese Stock Market

This article investigates the post-announcement drift (PAD) of stock returns in the Chinese stock market. We use a sample of voluntary trading disclosures to test the hypothesis that an asymmetric PAD exists in a market in which managers are more likely to suppress negative news. We show that a pattern of short-term momentum and long-term reversal in returns persists for up to 250 trading days following the announcement of trading statements in the Chinese stock market. This finding is stronger for positive announcements in terms of the magnitude and the variance of stock returns. Our findings are in line with both Shin’s theoretical predictions and the credibility hypothesis, in which disclosure and asset returns are jointly determined and the adoption of a “sanitisation strategy” in information disclosure generates more volatile returns for firms issuing good news. Further, we show that the latter effect is more pronounced for firms which are partially state-owned, suggesting that they potentially receive more government support, a finding which is in line with the hypothesis that the incentive to suppress negative information is related to a country’s legal/judicial system.