基于事件研究法的A股市场股权激励效应实证分析

本文以2010年沪深两市推出股权激励方案的90家上市公司为样本,选取公告日前5日至公告日后20日为事件窗口,运用事件研究法就股权激励推出对上市公司股价影响进行实证研究.结果表明:中国股市呈现明显的股权激励效应,股权激励公告发布前后股票产生持续的累计异常正收益;由于信息不对称,部分投资者通常会借助内幕信息提前买入,并获得可观的超额收益,而普通投资者在公告发布后买入只能获得小部分的超额收益并且需要承担更大的风险.     

高送转公告对股票收益率影响的实证研究

2009年,创业板推出之后,高送转股票的数量急剧增加。本文以2011年至2012年沪深两市推出10送转10及以上的高送转方案上市公司为样本。选取公告日前15天和公告日后15天为事件窗口,采用事件研究法,研究高送转预案公布日事件前后股票收益率的异常波动。结果表明:高送转股票在预案公布日之前存在显著的正超额收益率。布局高送转股票的最佳时机为预案公布日前7个交易日,风险最小,收益最大;而预案公布日之后,投资风险明显加大。     

高送转是馅饼还是陷阱? ——基于中国A股上市公司的研究

上市公司高送转是陷阱还是馅饼,关系广大投资者的利益。本文实证分析了中国A股市场高送转预案公告对股票收益率的影响,比较了不同板块不同送转比例的市场效应。研究发现:所有股票在高送转预案公告前后,均存在显著为正的累计超额收益,但并不存在显著的板块差异;累计超额收益主要产生于高送转预案披露前;上市公司高送转给普通投资者的大概率不是馅饼,而是陷阱。本文结论为监管层出台相关规范高送转行为和内部人减持行为的政策提供了经验证据。     

高送转超额收益的影响因素研究——基于2015-2016年的上市公司样本

高送转仅仅只是会计项目之间的一种转换,对企业的基本面等没有任何改善,但近年来的高送转股票频繁成为证券市场上炒作对象,送转公告发布后经常产生大幅累计超额收益.本文以2015年和2016年进行高送转的上市公司为样本,对各阶段时间节点的超额收益进行分类统计.研究结果表明事件期内确实存在较为显著为正的超额收益,并通过多项logistic方法以及多元线性回归构建相关因子之间的关系,得到送转时间、送转比例、换手率和公司净利润增速是超额收益效应的主要影响因素.     

资本炒作游戏“高送转”应增加透明度

<正>又是一年"送转"时,需要提前打点预防针。2016年11月23日,深交所发布《上市公司高比例送转方案的公告格式》,对上市公司高送转行为加以规范,要求披露高送转时必须披露业绩预告,原则上不支持亏损或业绩大幅下滑公司高送转,公司有责任向重要股东问询减持计划。众所周知,所谓高送转,是指上市公司大比例派送红股或以资本公积     

高送转股中的"除权日效应"研究

在中国资本市场不断发展的过程中,"高送转"一直是资本市场上经久不衰的话题.本文采用事件研究法对深圳主板上市的公司进行了研究,以高送转股的除权日前后30个交易日为窗口,研究发现提前买入高送转的股票确实可以获得超额收益.同时对数据分成了四个阶段,研究了这种"除权日效应"是否一直存在,而且经历了怎样的变化.研究发现,除权日效应经历了四个阶段,每个阶段都呈现了不同的特征.     

公司业绩预告投资策略探究

<正>2014年至2015年的中国的股市经历了一波牛市,牛市中借年报进行高送转,进行市值管理成为2014年年报公布时期的一大热点。2014年年报期间上司公司10送10,10送20不是少数。那么将时间发生期前移,通过业绩预告进行选股,然后持有至年报正式公告日是否会有超额收益呢?这样的超额收益是只有牛市时才有,还是每年都有呢?围绕这样的问题,我们展开了探究。上交所和深交所都规定了上司上市公司业绩预告的情形:     

A股上市公司融资租赁公告效应实证研究

以2007—2015年A股发布融资租赁业务公告的上市公司为研究对象,采用事件研究法实证研究融资租赁公告效应。结果表明:A股上市公司融资租赁公告能够带来显著为正的超额收益;截面回归数据表明融资租赁公告的超额收益与税率弱相关、与破产成本显著负相关、与关联交易行为显著正相关;债务互补型的公司开展融资租赁业务会降低公司的价值,信息不对称问题并不会对融资租赁超额收益产生明显影响。     

高送转的“盛宴”肥了谁?——基于东方国信的案例分析

随着上市公司年报的陆续披露,高送转的大戏也接连上演.备受投资者追捧的高送转,在其光鲜的背后却暗藏着陷阱.该文以今年“分红第一股”的东方国信为例,具体分析了到底是谁从上市公司高送转的行为中获得超额收益,最后提出几点建议希望对于保护投资者利益起到一定作用     

上市公司收购信息披露的市场效应比较

在上市公司的收购过程中,提示公告和正式公告是两个最重要的信息披露.以我国在 2002年 12月 1日至 2003年 10月 31日期间提交证监会审核无异议的上市公司收购案例为样本,利用市场模型考察提示公告与正式公告事件日周围的超额收益率、平均超额收益率 ,以及狭小窗口的累积超额收益与累积平均超额收益情况.结果表明,在上市公司收购事件中,提示公告的市场反应要显著高于正式公告的市场反应.     

The Chinese Stock Dividend Puzzle

In this paper, we examine the announcement effects of dividends with an emphasis on stock dividends in China's capital market. We find that dividend-paying stocks exhibit significantly positive abnormal returns while non-dividend-paying stocks show a negative announcement effect. Further, we document that the cumulative abnormal returns for pure stock dividends and combined dividends are the main drivers of this announcement effect. In contrast, pure cash dividend stocks experience no significant price run-up before announcement. The significant announcement effect of stock dividends is robust to controlling the earnings surprise effect. We offer some discussion of the possible explanations.     

The Differences Between Stock Splits and Stock Dividends: Evidence on the Retained Earnings Hypothesis

Abstract:  This paper investigates stock dividends and stock splits on the Copenhagen Stock Exchange (CSE), which is of interest because several of the more recent explanations for a stock market reaction can be ruled out. The main findings are that the announcement effect of stock dividends as well as stock splits is closely related to changes in a firm's payout policy, but that the relationship differs for the two types of events. A stock dividend implies an increase in nominal share capital and hence a decrease in retained earnings. Firms announcing stock dividends finance growth entirely by debt (explaining the need for an increase in nominal share capital) and retained earnings. Basically all firms announcing a stock dividend with a split factor of less than two can also afford to increase their total cash dividends permanently, at least proportionally to the increase in share capital, leading to a significant announcement effect of 4.23%. Firms announcing a stock dividend with a split factor of two or more also increase total cash dividends permanently, but less than proportionally to the increase in share capital. This leads to an insignificant announcement effect of 0.08%. These findings support a retained earnings/signaling hypothesis. For stock splits, no separate announcement effect was found when a firm's payout policy was controlled for. This lends support to the idea that a stock split per se is a cosmetic event on the CSE and is also consistent with the fact that making a stock split on the CSE is virtually cost free.     

The valuation effects of stock splits and stock dividends

This study presents evidence which indicates that stock prices, on average, react positively to stock dividend and stock split announcements that are uncontaminated by other contemporaneous firm-specific announcements. In addition, it documents significantly positive excess returns on and around the ex-dates of stock dividends and splits. Both announcement and ex-date returns were found to be larger for stock dividends than for stock splits. While the announcement returns cannot be explained by forecasts of imminent increases in cash dividends, the paper offers several signalling based explanations for them. These are consistent with a cross-sectional analysis of the announcement period returns.     

Did the 1986 Tax Reform Act Affect Market Reactions to Stock Splits?: A Test of the Tax-Option Hypothesis

This paper tests the prediction of the tax-option hypothesis that the market impact of stock splits would be reduced by the 1986 Tax Reform Act which eliminated the difference between long- and short-term capital gains tax rates. The results show significant excess returns on stock split announcement and ex-days even after 1986. The announcement and ex-day excess returns are similar in different periods before and after the Act. Further, there is no significant relationship between announcement excess returns and increase in returns volatility following splits. These findings are inconsistent with the tax-option hypothesis.     

Stock splits to profit insider trading: Lessons from an emerging market

Stock splits have long presented financial puzzles: Why are they undertaken? Why are they associated with abnormal returns? Abnormal returns, particularly those coming shortly before a split’s announcement date, should raise strong suspicions of insider trading, particularly in nations with weak regulatory structures. We examined the 718 split events in the emerging stock market of Vietnam from 2007 through 2011. We found evidence consistent with illegal insider trading, particularly in firms that were vulnerable to insider manipulation and, therefore, more likely to split their stocks. When vulnerable firms’ stocks did split, they provided significant excess short-term returns. Tellingly, the abnormal returns on those stocks prior to the split announcements were also extremely high, indeed higher than their abnormal post-announcement returns. Moreover, trading volume increased prior to the split announcement date. This suspicious pattern is what we would expect if insiders were trading on their knowledge. We propose that illegal insider trading in contexts where it is possible to escape serious penalty provides a previously undiscussed and cogent explanation for both stock splits and abnormal short-term returns.     

The Market Reaction to Stock Splits

In this paper, a model of market reaction to stock splits is presented and tested. We argue that the announcement of a split sets off the following chain of events. The market recognizes that, subsequent to the (reverse) split ex-day, the daily number of transactions along with the raw volume of shares traded will increase (decrease). This increase in volume results in an increase in the noisiness of the security's return process. The increase in noise raises the tax-option value of the stock, and it is this value that generates the announcement effect of stock splits. Empirical evidence using security returns, daily trading volume, and shareholder data strongly supports this theory. The evidence, in conjunction with this theory, also agrees with extant literature that splits result in decreased liquidity, but there is no evidence that this reduction in liquidity is priced.     

Stock-Price Effects of Internet Buy-Sell Recommendations: The Motley Fool Case

The Motley Fool has attracted significant notoriety for stock market buy‐sell advice on the Internet. Across five different investment portfolios, Motley Fool buy recommendations appear to generate an average 1.62% rise in stock prices on the announcement day (0), and 2.40% returns over the announcement period (?1, +1). Sell recommendations seem to cause a ?1.49% announcement day return, and a ?3.33% announcement period return. Small cap growth stock buy recommendations for The Motley Fool's flagship Rule Breaker Portfolio are associated with returns of 3.66% on the announcement day, and a 6.15% return over the announcement period. These findings suggest herd‐like behavior among Internet investors, and that such announcements are more newsworthy than second‐hand buy‐sell recommendations published in traditional print and electronic media.     

Valuation Effects of Greek Stock Dividend Distributions

This study analyses the price reaction to stock dividend distributions by firms listed on the Athens Stock Exchange on both the announcement and the ex‐dividend day. It also analyses earnings per share, dividends per share and trading volume in the pre‐ and post‐announcement periods. The findings show statistically insignificant abnormal returns on both the announcement and the ex‐dividend day. The analysis does not reveal any significant change in earnings per share and dividends per share, but it does reveal a significant decline in the market‐adjusted trading volume in the post dividend period. The findings, based on a different institutional environment, expand the empirical evidence on the value effects of stock dividends.     

The First‐ and Second‐Hand Effect of Analysts' Stock Recommendations: Evidence from the Swiss Stock Market

This paper empirically investigates the impact of both the first release of analysts' stock recommendations to a limited clientele and the subsequent dissemination of the same information in a major newspaper to a broader audience. For a sample of 1460 stock recommendations published in FuW, Switzerland's major financial newspaper, significant positive abnormal returns on the day of the original release of buy recommendations and on the day of publication in FuW are documented. Tests of the price pressure and information hypotheses reveal that analysts' recommendations contain new information, which is quickly incorporated in the stock prices on the first release of this information. In contrast, the statistically significant announcement effects associated with the subsequent publication can be primarily ascribed to price pressure in the underlying securities.     

Stock Splits and Stock Dividends: Why,Who, and When

This study investigates empirically why firms split their stock or distribute stock dividends and why the market reacts favorably to these distributions. The findings suggest that stock splits are mainly aimed at restoring stock prices to a “normal range.” Some support can also be found for the oft-mentioned signalling motive of stock splits. Stock dividends are altogether different from stock splits, and they appear to be a decreasing phenomenon. The clue to stock dividend distributions may lie in their perceived substitution for relatively low cash dividends.