市场环境、可交易价值对股票短期收益的影响分析

可交易价值是指股票在其价格形成过程中经历股份化过程,获取流动性和波动性而创造的价值,在不同的市场环境下,涉及可交易价值的相关因素对股票的短期收益行为具有不同的表现能力.本文以我国沪深A股市场2006-2008年间的急涨急跌行情为背景,运用面板数据分析方法对比了当大势处于上升和下降的不同市场环境中时,可交易价值对股票日收益率的解释能力.实证结果显示,相对于传统的系统风险因子,可交易价值因子对我国股市的短期收益行为反应更加敏感,在不同的市场环境下显示出不同的特征:流动性因子在急跌背景中的影响力更强,股价因子和波动性因子在不同市场大势下显示出不同的影响方向或程度.上升背景下,投资者更加偏好高流动、高波动、低价格的股票组合.这些特征既能反映投资者偏好,也能供市场监管和预测参考.     

基于可交易价值的股票定价模型实例研究

可交易价值是股票定价的影响因素,对股票的短期价格行为作用明显,名义股价因子、流动性因子和波动性因子均对我国沪深A股市场股票组合的周收益具有良好的解释能力,且表现形式在很大程度上取决于市场环境的不同以及由此而不断变化的投资者偏好。     

超额换手率与股价崩盘风险的关系研究

换手率究竟是投资者基于流动性溢价理论提前察觉风险脱身的表现,还是频繁交易下的股价泡沫？为此,本文以2013—2021年上证A股为数据来源,考察超额换手率对股价崩盘风险的影响。结果表明,超额换手率与股价崩盘风险呈现显著的负相关关系。本文结合流动性溢价理论认为,高流动性股票不会出现转手买卖难的局面,进而降低未来出现股价崩盘的风险,从股价崩盘风险角度研究超额换手率对资本市场稳定性的影响有重要的理论和现实意义。     

股利政策信息结构与股价行为研究

通过构建股利政策信息结构和时空两维股利信息模型,研究中国上市公司不同股利政策的信息结构、信息环境及其对波动性、市场深度和流动性等股价行为的影响。研究发现现金股利政策公告前,没有发现显著的信息性交易行为;股票股利政策公告前后,市场信息结构没有发生显著的变化;不分配利润的企业在公告前,出现了显著的由信息引起的交易行为;公司发布股利政策不仅能够传递公司价值的信息,而且公司价值信息的传递还与市场所处的信息环境密切相关,不同的信息环境、信息结构影响了信息作用于市场变量的变化路径。     

我国股市异质期望对收益率影响研究

本文对我国股市中异质期望水平对股价的影响进行分析。在传统序贯交易(EKOP)模型的基础上,引入衡量投资者"看涨"、"看跌"、"看平"的参数,并定义股票的交易活跃度ρ,提出投资者预期的序贯交易模型。选取了2010年1月到2012年6月间29支股票的面板数据,并在此基础上构建异质期望的代理指标。通过面板回归分析,得出结论:投资者的异质期望水平对股票收益率产生反向的影响。投资者对某一支股票的意见分歧程度越大,其收益率越低;看法越一致,则收益率越高。并且,这种反向影响在不同的市场状况下,差异更加显著,而对于不同的股票则差别不大。     

做市服务的供求分析新框架及其对股票流动性的影响

本文在已有文献的基础上提出了一个做市服务市场的供求分析新框架,并依此分析和实证考察了公司特征和股票转让方式选择以及做市商数量之间的关系.研究发现,新三板挂牌公司的股票流动性越高、资产规模越大、流通在外的股份数越少、股价水平越高,越倾向于选择做市转让;资产规模越大、股价波动性越弱,做市商数量越多.这表明,挂牌公司股票转让方式的选择是供给面因素和需求面因素共同作用的结果.另外,本文结合已有理论和新三板市场的制度背景,分析和实证考察了股票转让方式选择对股票流动性的影响.研究发现,挂牌公司的股票转让方式由协议转让变更为做市转让能够显著提升股票流动性,这种情况在控制选择偏差的处理效应模型和控制其他因素的倍差法模型中也得到了相同的结论.本研究对于当前新三板市场交易机制的设计与变革具有重要的启示意义.     

基于Logistic回归的股价上涨概率预测研究

将Logistic回归应用在多因子模型时,模型可利用反映股票涨跌信息的因子与股票收益率的历史数据实现Logistic回归对未来股价上涨概率的预测。实证分析结果显示,2012—2018年运用Logistic回归筛选出的大概率上涨的股票组合可获得较高的平均收益率、胜率和夏普比率,Logistic回归在沪深市场上可成功发挥其对股价上涨概率的预测功能。     

经理股票期权的行权价格

经理人股票期权是为了解决委托代理问题而向经理人提供的一项激励制度,而在这项制度中行权价格对激励效果的影响是至关重要的.传统的行权价格要么只是按照授予日的股票价格确定的,要么只是简单的按照一段时间内的平均股价确定,易出现外部"噪音"对股价影响带来经理收益与实际贡献不相符和经理作为内部人有操作股价变动牟利的问题.鉴于此,本文在股票内在价值的基础上,并通过流动性和股市泡沫两个调整因子,设计了新的行权价格.     

股价影响因素分析及预测研究

股票投资的收益与风险往往是成正比的,建立一个计算速度更快和预测精度更高的股票预测模型对金融投资者来说极具理论意义和实际应用价值。在定性分析国家宏观经济、市场供求、上市公司以及投资者心理这四个关键因素对股价波动产业影响的基础上,再选取11个量化指标作为自变量,运用因子分析法,从中提选出盈利能力、稳健能力、竞争能力、运营能力和增长能力5个公因子。以这五个因子为自变量,利用多元回归模型进行的股价预测结果表明:股价受企业的盈利能力、竞争能力和增长能力影响较大,其中竞争能力影响最为显著,而受稳健能力、运营能力的影响则较小。     

基金投资交易的股价效应研究

基金投资交易活动会对股价产生什么样的影响是关系到我国证券投资基金能否起到稳定市场作用的前提性问题。本文运用协方差分解估计方法弥补公开数据不足的缺陷,对基金投资交易与其所投资股票价格变动关系进行实证研究发现:我国基金投资交易与同期股价变动显著相关;基金交易在过程中对股价形成了流动性压力;基金管理人较其他投资者具有一定信息优势,股价变动包含了基金信息交易因素。研究未发现基金系统地进行正反馈交易的证据。     

流动性视角下的非流通股定价策略分析

金融市场上的流动性对金融资产定价有重要作用。在Longstaff模型的基础上对“卖掉持有股票的权利”进行定价,可得出股票的流动性价格,进而得到非流通股的价格。通过分析可知非流通股的价格是禁售期的减函数,是流通股的增函数;股票的价格波动率越大,贷款利率与无风险利率的差越大,非流通股的价格是就越低;反之,非流通股的价格就越高。以我国股票市场的相关指数进行验证,上述结论依然成立。     

Investor participation and the volatility-volume relation: Evidence from an emerging market

Using a unique dataset from the Chinese stock market that keeps track of the daily number of shareholders, we find that the ownership breadth (proxied by the number of shareholders) is negatively related to stock price volatility. However, consistent with the previous literature on volatility-volume relation, we find that the stock price volatility remains positively related to number of traders participating in the market. We also find that the relations of both the daily order imbalance and the daily depth imbalance with the number of shareholders (traders) are negative (positive). Our results suggest that a higher number of shareholders tend to supply liquidity and reduce volatility, while a higher number of traders tend to compete for liquidity and increase volatility.     

Call Auction Transparency and Market Liquidity: Evidence from China

This paper uses the natural experiment offered by the Shanghai Stock Exchange to investigate the impact of opening call auction transparency on market liquidity. We find that the dissemination of indicative trade information during the pre‐open call auction session leads to an overall improvement in stock liquidity in the continuous trading session. Bid‐ask spreads narrow in the first trading hour because adverse selection risk fell significantly and there is less price volatility in the continuous market. This effect is greater for actively traded securities than illiquid securities. Our findings are robust for different lengths of sample period, different lengths of trading hours after market open, and stocks that had (and had not) reformed the share split structure during our research period.     

Cash trading and index futures price volatility

This study examines the effect of cash market liquidity on the volatility of stock index futures. Two facets of cash market liquidity are considered: (1) the level of liquidity trading proxied by the expected New York Stock Exchange (NYSE) trading volume and (2) the noise composition of trading proxied by the average NYSE trading commission cost. Under the framework of spline–GARCH with a liquidity component, both the quarterly average commission cost and the quarterly expected NYSE volume are negatively associated with the ex ante daily volatility of S&P 500 and NYSE composite index futures. Conversely, liquidity and noise trading in the cash market both dampen futures price volatility, ceteris paribus. This negative association between secular cash trading liquidity and daily futures price volatility is amplified during times of market crisis. These results retain statistical significance and materiality after controlling for bid–ask bounce of futures prices and volume of traded futures contracts. This study establishes empirical evidence to affirm the conventional prediction of a liquidity–volatility relationship: the liquidity effect is secular and persistent across markets. © 2010 Wiley Periodicals, Inc. Jrl Fut Mark 31:465–486, 2011     

非流通股价值、股改对价与解禁股减持回报

本文以2002—2006年A股非ST类上市公司的388笔非流通股交易为研究对象,得出以下主要结论:第一,非流通股转让价格仅仅是当日非流通股交易价格的0.336;非流通股转让价格相对于流通股价格的比率受非流通股比例的负面影响;第二,此轮股权分置改革对价大多集中于10送3.07股,远低于合理送股对价水平,实际送股数量难以保证流通股股东的合理经济利益。进一步的分析也表明,股改前非流通股比例、非流通股转让价格比例是影响大小非套现回报率的重要因素。     

Liquidity,exchange listing,and common stock performance

The liquidity of securities—the relationship between volume of trading and changes in market price—has won increasing recognition as an element of investment strategy in recent years. Relatively high liquidity is deemed to be a desirable characteristic of a stock, especially for the institutional investor, who typically trades in large volume. Thus, firms can generally be expected to seek means of enhancing the liquidity of their shares. One of the supposed means of accomplishing this is by listing one's stock on a national securities exchange. This paper examines the relationship of common stock liquidity to both exchange listing and price behavior during major up and down movements in the market. Our conceptual and empirical analyses indicate that liquidity is linked to price behavior; and we suggest that the view held by at least some corporate officers—that exchange listing increases liquidity—may be erroneous. More specifically, it appears that when the amount of firm capitalization is taken into account, exchange listing does not result in greater stock liquidity.     

Non‐Tradable Share Reform,Liquidity, and Stock Returns in China

This article studies the influence of the non‐tradable share reform in the cross‐section of stock returns in China. Prior research has generally neglected this important development in the Chinese stock market. We find that the firm‐specific illiquidity measures that reflect direct transaction costs, price impact and difficulties in trading immediacy, exhibit a positive and significant relationship with stock returns. These effects are particularly pronounced after the non‐tradable share reform. Furthermore, in the post‐reform era, portfolios with high illiquidity (i.e. high relative bid–ask spread, high Amihud illiquidity, low Amivest liquidity ratio) significantly outperform portfolios with low illiquidity, controlling for size, and book‐to‐market effects.     

机构投资者类型对股市波动的影响

本文以2007-2010年我国资本市场的整个波动周期为考察期间,在考虑了变量内生性的问题的基础上,采用2SLS方法实证分析了机构整体持股对于股价波动的影响。研究发现:机构整体持股对股市波动的影响因不同的市场状态而具有非对称性,并可以用市场状态假说进行解释;在对于机构分类的实证研究中发现,在控制内生性情况下,同一类别的机构投资者对股市波动的影响是随着市场的变化而变化;同时,即使在相同的市场环境下,不同的投资者对市场波动的影响也不相同。因此,需要辨证认识各类机构投资者的作用,针对不同机构投资者的特征及不同的市场状态采取不同措施以稳定市场。     

Naming Products in China: Local or Foreign Branding

ABSTRACT

This study examines the effect of program trades on the price changes in the Korean stock index futures and spot markets employing intraday return and trading data. Program trades in the Korean stock market create an instant imbalance in market liquidity. However, their impact is very short-lived and limited in an economic sense. Moreover, there is little tendency for market returns to over-react to program trades. An increase in program trades results in higher spot market volatility but does not cause monotonically increasing futures market volatility. Overall, program trades do not destabilize the stock market in Korea despite some positive association between program trades and volatility.     

货币流动性和市场流动性:波动与风险

目前,货币流动性和市场流动性的关系成为股票市场参与者关注的焦点。本文分析了货币流动性与市场流动性的联系,实证研究了货币流动性和市场流动性的波动关系,以及货币流动性对市场流动性风险的影响,发现货币流动性M2、M1和市场非流动性动态负相关,M0与市场非流动性动态不相关;货币流动性M2和M1的正向冲击能一定程度降低市场流动性波动风险,而M0会增加市场流动性波动风险,市场流动性风险自身是影响市场后期流动性风险的最大因素。