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"事前披露"能否降低董监高交易的信息优势?中国证监会于2017年5月修订并实施的"减持新规"首次为上述命题的检验提供了独特的研究场景。通过"事件研究法",本文对"减持新规"颁布前后的董监高减持行为进行研究,考察事前披露减持计划是否会削弱董监高减持时的信息优势。实证结果表明,"减持新规"实施后董监高减持的短期超常回报显著低于"减持新规"实施前,这说明事前披露会抑制董监高交易的择时能力。进一步研究发现,当公司信息质量较差、所处地区的市场化程度较低、成长性较高、减持规模较大时,事前披露对董监高减持获利能力的削弱作用更强;"减持新规"实施对董监高减持超常回报的削弱主要体现在交易日与减持计划披露日间隔短的减持样本中。本文不仅在实证层面上验证了"事前披露"可以降低董监高交易的信息优势,丰富了内部人交易研究文献,也为我国"减持新规"的实施效果提供了证据和建议。 相似文献
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《会计研究》2017,(12)
大股东利用"高送转"达到减持目的,已成为当前资本市场的"乱象"之一。本文以2010-2015年推出"高送转"方案并且发生大股东减持的上市公司为研究样本,研究了"高送转"对大股东减持规模的影响,并进一步考察了财务业绩对二者关系的调节作用。研究发现:(1)在发生大股东减持的全部上市公司中,相较于未"高送转"的公司,"高送转"公司大股东减持的比例更高;(2)"高送转"强度越大,大股东减持规模越大;(3)好的财务业绩状况可以抑制"高送转"与大股东减持规模之间的正向关系,相反的,差的财务业绩状况则会加剧二者的正向关系。在考虑盈余管理的影响后,发现现金收益负向调节"高送转"与大股东减持规模的关系,应计收益正向调节二者之间的关系。 相似文献
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以2007~2009年被大股东减持的沪深A股上市公司作为样本,运用OLS与Logistic回归方法,实证分析了大股东通过操纵重大信息披露在股份减持过程中的隧道行为。得出了在减持前30个交易日被大股东减持的上市公司有显著的正累计超常收益,但减持后30个交易日则出现显著的负累计超常收益;被大股东减持的上市公司在减持前披露"利好"消息、减持后披露"利空"消息的概率高;民营控股上市公司大股东操纵上市公司信息披露的概率较高;公司估值(托宾值)越高,大股东信息操纵行为的概率也越大;被减持公司的净资产收益率(ROE)与总资产收益率(ROA)对大股东信息操纵行为的概率不存在显著影响等结论。 相似文献
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大股东与高管减持公司股票是内部人交易的主要形式,因其可能损害其他股东的合法权益而备受监管部门的关注。本文以中泰化学大股东减持为研究对象,通过事件研究发现,伴随着一系列利好消息的发布,大股东减持获得了显著为正的超额收益,表明其具有较强的时机选择能力。进一步分析发现,定期报告的业绩增长推高了减持期间的公司股价,但盈利水平的改善存在一定程度的盈余管理。结果表明,内部人交易利用其信息优势与对上市公司的影响,损害了中小股东的正当权利,破坏了市场的公平竞争。 相似文献
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本文基于外部治理视角,利用2007-2010年间沪深股市568家上市公司的2246个大股东减持样本,实证分析了地区市场化进程与大股东减持差异的关系.研究发现,“外部治理说”得到了相应的验证,即在市场化进程越高的地区,大股东减持的力度也越低,而在市场化进程越低的地区,大股东减持的力度则越高.进一步研究发现,市场中介组织的发育和法律制度环境的发展程度与大股东减持间也存在显著的负相关关系. 相似文献
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以2012至2016年深交所A股上市公司为研究对象,实证检验机构投资者调研、大股东减持与投资效率内在关系。研究发现:大股东减持对公司投资效率具有显著负面影响,机构投资者调研对两者关系发挥抑制作用。进一步检验发现,大股东减持导致公司投资不足问题,但对过度投资没有显著影响;只有当公司属于非国有企业、内部信息环境较差时,研究结论成立,但当公司属于国有企业、内部信息环境较好时,回归结果并不显著。 相似文献
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经济后果、会计管制与会计寻租 总被引:61,自引:3,他引:61
本文通过深化会计经济后果学说的内涵 ,研究了会计管制与会计寻租之间的互动关系 ,并认为会计管制不一定导致会计寻租 ,而会计寻租的存在则表明存在某种程度的会计管制 ,会计寻租一旦存在就会以其惯性促使会计管制及会计设租现象的持续存在 ,因而会计寻租在一定条件下只能被适度控制而不可能彻底消除 ,而会计寻租的存在会导致社会经济资源租值的耗散 ,从而引起社会福利的损失。我国经济的转型特征及我国会计规则的“双轨”运行 ,表明我国现在乃至将来都将存在会计寻租现象 ,会计寻租将随我国政治经济生活的民主化进程的加快而日益普遍 ,因此开展会计寻租研究具有较重大的现实意义。 相似文献
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上市公司内部人亲属股票交易行为研究 总被引:3,自引:1,他引:3
中国的《证券法》等法律法规禁止内部人短线交易,并设置了内部人禁止股票买卖的敏感期,但内部人亲属不受此限制。本文对深圳证券交易所2007年5月至2010年5月的内部人亲属股票交易数据分析发现:(1)上市公司的内部人亲属对内部人任职企业的股票交易次数已经远远多于内部人自身的交易次数;(2)内部人亲属的交易存在很多的短线交易行为与敏感期交易行为;(3)内部人亲属股票交易整体而言能够获得超额收益;(4)短线交易与敏感期交易有助于内部人亲属获得超额收益;(5)董事长或总经理的亲属获得的收益比其他内部人亲属更高。据此,本文认为证券交易监管机构需要关注内部人亲属股票交易行为,尤其警惕内部人亲属交易可能成为规避内部人交易管制的替代方式。 相似文献
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Taiga Saito Takanori Adachi Teruo Nakatsuma Akihiko Takahashi Hiroshi Tsuda Naoyuki Yoshino 《Asia-Pacific Financial Markets》2018,25(3):179-220
In this study, we investigate ordering patterns of different types of market participants in Tokyo Stock Exchange (TSE) by examining order records of the listed stocks. Firstly, we categorize the virtual servers in the trading system of TSE, each of which is linked to a single trading participant, by the ratio of cancellation and execution in the order placement as well as the number of executions at the opening of the afternoon session. Then, we analyze ordering patterns of the servers in the categories in short intervals for the top 10 highest trading volume stocks. By classifying the intervals into four cases by returns, we observe how different types of market participants submit or execute orders in the market situations. Moreover, we investigate the shares of the executed volumes for the different types of servers in the swings and roundabouts of the Nikkei 225 index, which were observed in September in 2015. The main findings of this study are as follows: Server type A, which supposedly includes non-market making proprietary traders with high-speed algorithmic strategies, executes and places orders along with the direction of the market. The shares of the execution and order volumes along with the market direction increase when the stock price moves sharply. Server type B, which presumably includes servers employing a market making strategy with high cancellation and low execution ratio, shifts its market making price ranges in the rapid price movements. We observe that passive servers in Server type B have a large share and buy at low levels in the price falls. Also, Server type B, as well as Server type A, makes profit in the price falling days and particularly, the aggressive servers in the server type make most of the profit. Server type C, which is assumed to include servers receiving orders from small investors, constantly has a large share of execution and order volume. 相似文献
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Trading halts increase, rather than reduce, both volume and volatility. Volume (volatility) in the first full trading day after a trading halt is 230 percent (50 to 115 percent) higher than following “pseudohalts”: nonhalt control periods matched on time of day, duration, and absolute net-of-market returns. These results are robust over different halt types and news categories. Higher posthalt volume is observed into the third day while higher posthalt volatility decays within hours. The extent of media coverage is a partial determinant of volume and volatility following both halts and pseudohalts, but a separate halt effect remains after controlling for the media effect. 相似文献
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Reputation Effects in Trading on the New York Stock Exchange 总被引:1,自引:0,他引:1
Theory suggests that reputations allow nonanonymous markets to attenuate adverse selection in trading. We identify instances in which New York Stock Exchange (NYSE) stocks experience trading floor relocations. Although specialists follow the stocks to their new locations, most brokers do not. We find a discernable increase in liquidity costs around a stock's relocation that is larger for stocks with higher adverse selection and greater broker turnover. We also find that floor brokers relocating with the stock obtain lower trading costs than brokers not moving and brokers beginning trading post‐move. Our results suggest that reputation plays an important role in the NYSE's liquidity provision process. 相似文献
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动量交易策略指的是事先针对股票收益及交易量设定过滤规则,一旦股票收益或者股票收益和交易量同时满足过滤规则就买入或卖出股票的交易策略。动量交易策略的理论基础是行为金融学。国外投资者已经成功地在实践中应用了该策略。我国股票市场是否存在动量效应,还未形成统一的结论。在总结国内外学者研究方法的基础上,利用目前可用的数据,对我国股票市场在中期条件下动量交易策略的适用性进行了实证研究。但得出的结论并不支持存在动量效应。 相似文献
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Individual Investor Trading and Stock Returns 总被引:2,自引:0,他引:2
This paper investigates the dynamic relation between net individual investor trading and short‐horizon returns for a large cross‐section of NYSE stocks. The evidence indicates that individuals tend to buy stocks following declines in the previous month and sell following price increases. We document positive excess returns in the month following intense buying by individuals and negative excess returns after individuals sell, which we show is distinct from the previously shown past return or volume effects. The patterns we document are consistent with the notion that risk‐averse individuals provide liquidity to meet institutional demand for immediacy. 相似文献
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Trading by corporate insiders and their tippees is analyzed in Anheuser-Busch's 1982 tender offer for Campbell Taggart. Court records that identify insider transactions are used to disentangle the individual insider trades from liquidity trades. Consistent with previous studies, insider trading was found to have had a significant impact on the price' of Campbell Taggart. However, the impact of informed trading on the market is complicated. Trading volume net of insider purchases rose. Contrary to the broad implications of adverse selection models, Campbell Taggart's liquidity improved when the insiders were active in the market, and the insiders received superior execution for their orders. 相似文献