融资融券下卖空机制的国内A股市场微观属性

融资融券的国内推行给证券交易市场提供了完整的交易准则,研究融资融券能够给监管人员以及投资人员提供决策依据。文章研究了252只沪深股票的交易信息,并选取双重差分方式给出卖空机制关于定价效率的作用。研究结果表明:卖空机制推广能够提升股票的定价效率,该状况的产生是由于投资人异质性减弱以及股市流动特性加强;能够卖空的股票波动幅度减弱,且能够融合大规模交易。     

卖空机制能够抑制上市公司诉讼风险吗?

文章以中国开启融资融券交易为准自然实验环境,以2010—2019年A股上市公司为研究样本,探究了卖空机制与上市公司诉讼风险之间的关系.结果表明:卖空机制的引入降低了公司的诉讼风险;独立董事作为内部治理机制的重要安排,有利于强化卖空机制对诉讼风险的抑制作用;机构投资者作为有效的信息中介,有利于强化卖空机制对诉讼风险的抑制作用.文章的研究丰富了卖空机制经济后果的研究,丰富了诉讼风险影响因素的研究.     

融资融券交易提高了市场流动性吗

运用SVAR模型检验2010年3月31日至2019年11月7日融资买空和融券卖空交易对上海和深圳A股市场流动性的同期影响和长期影响,并进一步分析不同标的股票范围和不同的市场状态下融资买空和融券卖空交易对沪深A股市场流动性的影响。研究结果表明:融资买空和融券卖空交易对上海和深圳A股市场流动性的同期和长期影响都是显著为正的,且对上海A股市场流动性的正向影响大于深圳A股市场;融资买空交易对市场流动性的正向影响大于融券卖空交易,这是因为融资买空交易规模远远大于融券卖空交易规模;融资买空交易与融券卖空交易对市场流动性的同期和长期影响并不随着标的股票范围的扩大而增加,而是与二者交易规模有关;熊市时融资买空交易对市场流动性的长期影响大于牛市。     

我国证券市场卖空交易模式选择

建立卖空交易机制有助于解决我国股市目前存在的问题。本文介绍了海外卖空交易机制的主要模式,提出我国要博采众长,同时考虑我国证券市场发展的特点,在合适的阶段推进合适的卖空交易模式。     

我国证券市场卖空交易模式选择

建立卖空交易机制有助于解决我国股市目前存在的问题.本文介绍了海外卖空交易机制的主要模式,提出我国要博采众长,同时考虑我国证券市场发展的特点,在合适的阶段推进合适的卖空交易模式.     

卖空交易机制在我国具有会计信息的外部治理作用吗——基于首批融资融券试点标的股的检验

2011年中国23家海外上市公司因会计信息"瑕疵"受到"卖空袭击",导致股价大跌,这表明在允许卖空的资本市场中,会计信息的市场环境不同于"单边市"市场,"信息瑕疵"本身也是一种投资机会,并且股价往往会放大对负面消息的反应。因此,上市公司管理层应审慎对待市场环境的变化,规范信息披露行为,尽可能避免公司受"卖空袭击"而带来的市值损失。基于中国证券市场首批融资融券试点标的股数据研究发现,我国上市公司信息披露行为并未充分考虑卖空交易机制对市场环境带来的影响,融资融券标的股上市公司会计信息质量与其他上市公司无显著差别。这可能有两个方面的原因:一是我国卖空机制试点期间尚存在较为严格的卖空约束,二是上市公司管理层对卖空风险反应不足。     

融券业务能保护投资者吗?——中信证券“巨亏门”的案例分析

正充分、透明的信息披露,是资本市场良性、健康发展的基础,它不仅来自法律、法规的强制性要求,还需要有相应的利益激励制度安排,推动、激励资本市场各参与方更有效地挖掘信息,提升市场的透明度,以保护投资者的利益,而这也正是卖空机制存在的理论基础。我国资本市场自20世纪90年代初恢复设立以来,一直是一个"单边市",即不允许卖空交易的存在。没有卖空机制的约束,被认为是中国资本市场信息披露不充分、质量低的一个制度性因素。     

卖空机制与会计稳健性——基于债权人视角的研究

自2010年我国开展融资融券业务以来，关于该交易制度实施效果的研究不断深入，但尚无文献对债权人如何看待卖空机制这一问题做出回答。从债权人视角出发，分析卖空机制引入后，债权人对标的公司会计稳健性需求的变化，并利用融资融券首次启动提供的准自然实验环境，采用多时点双重差分模型检验上述影响。研究发现，卖空机制引入后，标的公司的会计稳健性显著提升，且这种影响在债务水平较高的公司中更加明显。进一步研究发现，卖空交易越活跃，标的公司会计稳健性越高；卖空机制引入后，标的公司的短期债务比例显著提升而长期债务比重显著下降。研究结果表明，债权人需要债务人采取更加稳健的会计政策来应对卖空交易带来的风险。     

卖空机制与资本结构动态调整——基于信息披露质量的中介效应北大核心

选取2008～2015年深交所上市公司为研究样本,以信息披露质量为中介变量,采用双重差分方法和多元线性回归方法,研究卖空机制对企业资本结构动态调整的影响。结果表明:卖空机制的引入提高了企业的信息披露质量,加快了企业实际资本结构向其目标资本结构调整的速度,信息披露质量在卖空机制与资本结构动态调整之间发挥了显著的中介效应。为资本结构动态调整影响因素的研究提供了新的分析方法,并为进一步完善卖空交易机制提供了经验证据。     

卖空管制放松与上市公司现金股利：促进还是抑制？

基于2006—2020年中国A股上市公司的数据,验证卖空管制放松对上市公司现金股利分配的影响。研究发现,相比于不可卖空的公司,可卖空公司在被列入卖空标的后,其现金股利分配意愿、分配规模与分配平稳性均显著提升。机制检验发现,卖空管制放松对现金股利分配的促进在代理问题严重、投资机会少的公司中更显著,这支持了代理成本机制;同时,在信号传递能力强、信号传递需求大的公司中,卖空管制放松对现金股利分配的促进更显著,这支持了信号传递机制。进一步分析发现,现金股利分配能力不足的公司在应对卖空压力时并未使用“高送转”作为替代。而对于我国资本市场中广泛存在的达标式分配,卖空管制放松能够产生抑制作用,且抑制作用体现在没有再融资需求的公司中。研究表明,卖空管制放松促进了上市公司现金股利分配,卖空机制能够为我国资本市场中的现金股利监管提供市场化路径。     

卖空机制具有治理作用吗？——基于内控质量的经验证据

以2014年至2018年我国A股上市公司为样本,以解除卖空限制这一事件为研究情境,系统考察了卖空制度执行对企业内控质量的影响。研究发现,解除卖空限制显著促进了企业内部控制水平的提高,并且在资本市场外部监督机制较宽松的情况下,卖空机制对企业内部控制质量的促进作用更加明显。内控质量改善动因分析表明低质量内控行为引起卖空势力的聚集,导致企业面临较大的卖空压力。卖空压力的存在是企业完善内控体系、提升内控质量的重要动因。经济后果分析表明解除卖空限制以内控质量改善为途径,促进了企业财务报表真实可靠、经营效率效果及合法合规等内控目标的实现。研究结果提供了卖空机制与内控质量间因果关系的经验证据,对于理解资本市场监督机制对企业内控制度影响的经济后果具有重要意义。     

Does Short Selling Enhance the Allocational Role of Stock Price? Evidence from Hong Kong

We investigate the real effect of short selling on corporate investments and, in particular, examine whether short selling improves managerial learning from stock prices in making investment decisions. We find that short selling improves investment sensitivity to stock price, most likely through a channel that short selling increases stock price informativeness. Using the lifting of uptick rule for index arbitrageurs and market makers as an exogenous shock to short selling intensity, we confirm the causal effect of short selling on managerial learning. Overall, our evidence suggests that short selling enhances the role of stock price in resource allocation.     

融资交易与融券交易对中国股票定价效率的影响一致吗？

分析融资交易、融券交易对标的证券定价效率影响的不一致性，可以发现，融资融券交易制度的推出显著地提高了标的证券的定价效率，但融资交易和融券交易的影响却存在不一致性。具体而言，融券交易提高了定价效率而融资交易降低了定价效率。融券交易对改善高估值股票的定价效率更加显著，融资交易的影响则没有显著差异。融资融券调控不应采取一刀切的方式，应针对不同标的采取差异化的调控。     

Institutional investors' attention to environmental information,trading strategies,and market impacts: Evidence from China

Using a large proprietary database of intraday high‐frequency trading, we investigate the trading strategies of institutional investors in dealing with the negative environmental event disclosure of listed companies and their impact on markets, aiming to reveal the mechanism of the lack of “green efficiency” in China's capital market from the perspective of institutional investors. The results show that institutional investors react to negative environmental events prior to the announcements, indicating premature information leakage in the market; in addition, their trading behaviors mitigate the immediate effect of negative environmental event announcements on stock price. After the event is disclosed, institutional investors engage in short‐term selling and long‐term buy and hold. This trading strategy undermines the irrational selling of individual investors in the event of disclosure, short‐term decline in stock price, and long‐term reversal of market overreaction. In a China context, institutional investors generally take environmental information into consideration. However, they fail to recognize the long‐term value effect of negative environmental events and instead cater to trading strategies towards market volatility.     

Do short selling restrictions destabilize stock markets? Lessons from Taiwan

Short sellers have been routinely blamed for triggering, or exacerbating, stock market declines. The experience of Taiwan provides an interesting case study of the impact of short selling bans on stock returns volatility in a time series framework due to the length of time the short selling ban was in place there. Estimating several variants of an asymmetric GARCH model and a Markov switching GARCH model we find robust evidence that short selling restrictions raise stock returns volatility. The only qualifier is that the impact of short sale bans is a feature of the expansionary phase of business cycles. During recessions this effect dissipates.     

房地产开发用地招拍挂制度的市场绩效研究

我国的土地出让招拍挂制度是具有重大意义的市场竞争性交易制度和社会资源配王方式.论文运用拍卖理论简要回顾了土地招拍挂制度影响市场绩效的经济学原理,对全国(2003-2005)和北京(2005-2007)城市土地有偿出让市场进行了分类统计,并以此数据为基础对招标、拍卖和挂牌三种不同出让方式的市场绩效进行了对比分析,得出了我国土地出让市场中存在理论和实践并不一致的结论,并指出了造成该问题的原因是政府对招拍挂制度的干预,最后提出了提高招拍挂制度绩效的建议.     

Deregulation of short selling and corporate cash dividend policy: A quasi-natural experiment from China

This study takes China’s short selling deregulation as a quasi-natural experiment, employs a sample of Chinese A-share listed firms from 2007 to 2017, and tests the impact of a short selling pilot on firms’ cash dividends using a difference-in-differences model (DID). We find that China’s short selling pilot significantly increases the pilot firms’ cash dividends. The mechanism test shows that short selling can improve the pilot firms’ cash dividends by playing a corporate governance role to restrain dual agency costs such as management fees and major shareholders’ tunneling. Furthermore, we identify that short selling restrains the behavior of “large stock dividends” and increases the cash dividends of “large stock dividends” firms. Moreover, the governance effect of short selling is complementary to the external governance environment. The higher the degree of marketization and government quality, the more significant the governance effect of short selling to increase the pilot firms’ cash dividends. This study enriches not only the research related to cash dividends in emerging economies, but also provides new empirical evidence for the evaluation of China’s short selling deregulation and offers valuable lessons to other emerging economies.     

Value and liquidity under changing market conditions

Papers studying the liquidity of a market tend to focus on decisions involving the trade-off between the selling price and the time-till-sale for a given set of market conditions. This paper characterizes market conditions using a price-probability locus; a change in market conditions is some combination of changes in the level and/or slope of this locus. I show how the effect of either type of change on price and on the probability-of-sale can be decomposed into those commonly associated with an increase in the value and those which involve a substitution between price and probability. Two adding-up conditions restrict the set of possible predictions. Though the discussion focusses on real estate market, where scarcity is rationed by a mechanism which combines search and bargaining, the same ideas apply to markets with other types of selling mechanisms.     

Ownership structure,expectations, and short sales on the Nasdaq

We estimate expected short interest for Nasdaq stocks. Extending prior work, our research is among the first to investigate the impact of ownership structure on short-selling activity. We find that short interest is negatively related to institutional ownership and positively related to inside ownership; stocks with greater liquidity and smaller relative spreads are more heavily shorted. We also develop a measure of the unanticipated level of short selling; relative to the reported amount of short interest, this unexpected level of short selling seems at first to better represent the opinions of informed investors engaging in costly short-selling activities. However, the power of the unanticipated level of short-selling factor is displaced when we make allowances for traditional market, firm-size, and momentum variables.