证券市场投资者信心指数刍议

鉴于投资信心是一个较难量化的因素，因此，要想研究证券价格和投资信心之间的关系，就应建立投资信心指数来帮助分析。     

Market Sentiment and Investor Overreaction: Evidence from New York Listed Asian Country Exchange Traded Funds

This article investigates Asian Country Exchange-Traded Fund (ETF) price deviation with underlying due to market sentiment. By implementing a dynamic contrarian trading strategy and a buy-and-hold strategy, this article finds that significant abnormal excess trading profit can be generated by capitalizing on the overnight price reversion. The excess return generated by the dynamic strategy over buy-and-hold separates the influence of market sentiment to ETF price deviation from fundamental movements. By studying the relations between variations of the excess returns and market sentiment, the article finds that the ETF price deviation is highly influenced by market sentiment and the effect exacerbates during financial crisis and distress.     

School Holidays and Stock Market Seasonality

Using school holiday data from 47 countries, we find a strong link between school holidays and market returns. Stock market returns in the month after major school holidays are 0.6% to 1% lower than in other months. This explains, but is not limited to, the “September effect.” In the United States, September is the only month that exhibits a negative average return over the past century. The postschool holiday effect remains even with monthly fixed effects. We explore the explanation that the effect is due to investor inattention during school holidays, which slows the incorporation of (negative) information in security prices.     

Is Stock Market Overreaction Persistent Over Time?

This paper examines the stability and persistence of the market overreaction hypothesis as posited by DeBondt and Thaler (1985 and 1987), and reinforced by Chopra, Lakonishok, and Ritter (1992). Using monthly CRSP data for the period 1926 through 1992, we find that returns obtained from a contrarian investment strategy are not time-stationary. Specifically, there is no winner-loser portfolio relationship during the post-war period of 1940_50s. The relationship resumes during the pre-energy-crisis subperiod, but weakens again during the post-energy-crisis subperiod. The effectiveness of trading based upon the overreaction hypothesis is, therefore, suspect.     

投资者分歧、异常交易量和股票横截面收益率预测——基于中国股票市场的经验证据

本文定义月度异常交易量为本月与上个月交易金额的比值,发现中国市场月度收益率与滞后一个月的异常交易量显著负相关。在控制了公司规模、账面市值比、流动性以及动量效应等指标后仍然具有显著的解释作用。进一步研究表明,在出现高异常交易量后的12个月内,换手率和特质性波动率都有大幅上升。本文认为,交易量上升代表着市场分歧程度和受关注程度的增加,在卖空约束下会使得股票价值高估,从而造成未来收益率下降。     

Stock Market Volatility in an Emerging Market: Further Evidence from the Athens Stock Exchange

We investigate the time series properties of the daily and weekly returns from the Athens Stock Exchange (ASE) index for the years 1987 to 1997. We investigate whether important time-series characteristics have changed significantly over time. The Greek market has recently undergone major changes including complete capital flow liberalization, the implementation of computerized trading, as well as significant increases in market volume and capitalization; we thus contrast the 1987–90 and 1991–97 periods. Our findings suggest the dynamics of the ASE composite index returns have changed as the market has developed.     

投资者情绪、宏观经济变量及股票市场的关系研究

选取2010年7月至2017年7月沪深300指数、5个投资者情绪代理变量、11个宏观经济变量的月度数据,首先通过主成分分析法构造出投资者情绪因子、经济增长因子和货币因子,然后采用VAR模型研究了这三个因子与沪深300指数之间的关系,结果发现:沪深300指数除了受其自身滞后项的影响,投资者情绪也起到了较强的正向作用;投资者情绪则主要受到了沪深300指数和货币因子的影响,且沪深300指数从第4期开始成为最重要的因素;经济增长因子主要受自身影响;而货币因子除了受自身影响外,经济增长因子也起着较大的作用。     

投资者关注与分析师评级漂移——来自中国股票市场的证据

本文使用一个直接源自于投资者行为的新颖变量——财经互动社区的超额发帖量——作为投资者关注的代理变量,发现投资者关注可以用来解释分析师评级的漂移现象,即针对分析师评级变动,股价的立即反应随着投资者关注的增加而增强,股价的漂移随着投资者关注的增加而减弱,同时发现投资者关注对股票交易量具有显著正向的作用。     

Investor Attention and Stock Returns: International Evidence

This article examines the asymmetric/discriminative effects of investor attention on expected stock returns among 15 markets through economic expansions and recessions. The predictive power of attention tends to be short-lived and weakens the autocorrelation within returns. Accounting for business cycles not only confirms that the predictability of attention endures with volatility but also explicates the asymmetric effects that underlying pessimism functions better. International evidence contributes to the literature on investor attention and reveals the discrepant effects of attention with three levels of market efficiency: semi-strong, stronger than semi-strong, and weak.     

台湾证券市场投资者保护机制

投资保护的基本原理包括投资自己责任原则与信息充分披露原则两大部分。投资自己责任原则的精神在于投资应对自己的投资决策行为负责，一般所称投资保护并非保证投资的投资获利。信息充分披露原则的精义在于藉由监管机构规范有关充分披露、降低诈欺行为与内幕交易，强化证券市场参与的自律规则，以达到保障投资合法权益的目的。     

Investor Sentiment and Stock Returns: Evidence from Turkey

This paper investigates the relation between investor sentiment and stock returns on the Istanbul Stock Exchange, employing vector autoregressive (VAR) analysis and Granger causality tests. The sample period extends from July 1997 to June 2005. In the VAR models, stock portfolio returns and investor sentiment proxies are used as endogenous variables. Two dummy variables accounting for natural and economic crises are used as exogenous variables. The analysis results suggest that, excepting shares of equity issues in aggregate issues, stock portfolio returns seem to affect all investor sentiment proxies, namely closed-end fund discount, mutual fund flows, odd-lot sales-to-purchases ratio, and repo holdings of mutual funds. Investor sentiment does not appear to forecast future stock returns; only the turnover ratio of the stock market seems to have forecasting potential.     

基于投资者有限注意的“应计异象”研究——来自中国A股市场的经验证据

本文在应计定价被高估的"应计异象"研究基础上,从投资者有限注意角度出发,将投资者分为高关注和低关注两类,实证检验两类投资者对应计定价的不同影响。实证研究发现,高关注投资者由于能够充分关注到包括应计和现金流在内的盈余组成部分,因而能够对应计作出较为合理的定价;相反,低关注投资者则对应计作出过高的定价。进一步的研究发现,在不同的市场态势下,高、低关注投资者对应计定价具有不同的表现:当市场处于牛市时,高关注投资者对应计进行了合理定价,而低关注投资者则存在对应计的高估;而熊市时,高关注投资者对应计作出偏低的定价,而低关注投资者则对应计作出了较为合理的定价。     

行业趋同度、投资者情绪与股市下跌风险

行业趋同度及投资者情绪可以反映市场交易热度.用格兰杰因果网络计算市场的行业趋同度,指数换手率、波动率及BEYR代表投资者情绪,研究这些指标对指数收益及股市下跌风险的影响发现:4个指标对指数收益的预测能力并不稳健,但是对股市下跌风险却有显著的预测能力;用4个指标构造合成因子,发现合成因子对股市下跌风险的预测能力更为显著;利用合成因子进行择时,可以有效避免市场极端的下跌行情,因子择时策略的夏普比率达到0.53,远超指数买入持有策略的0.14.综合来看,行业趋同度及投资者情绪代表的交易热度能够对股市下跌风险提前预警,从而带来投资收益的显著提高.     

股票市场投资者结构国际比较研究

本文梳理了A股市场与相关国家(地区)股市投资者结构的现状,探讨这些市场投资者结构的演变路径、以及促成这种演变的主要因素。基于境外主要市场投资者结构演变及政策措施的经验教训,本文提出改进A股市场相关制度的六点政策建议:第一,从更宏观的政策层面入手,改进上市公司结构,增厚上市公司利润,以增进A股市场的长期投资价值;第二,着力培育和鼓励大体量资金机构进入股市;第三,有必要继续扩大海外合格机构投资者资金规模;第四,完善金融产品供应,适当放宽交易规则约束,使机构投资者有更多工具和交易方式参与市场交易;第五,在个人投资者方面,监管部门需要适度转变监管理念,进而改进相关交易规则,鼓励个人投资者以合理方式理性参与股市;第六,创新税收激励机制,合理引导个人投资者。     

我国股票市场的投资者状况

截至2019年12月31日,全国股票投资者数量达15975.24万,较上年同期增长9.04%,其中自然人投资者占比99.76%。日渐庞大的投资者群体反映了我国广大人民群众日益增长的财富管理需求,也对投资者保护工作提出了新的考验。较为科学地掌握我国投资者状况,是有关各方进一步把握资本市场运行规律,精准开展投资者保护的基础。中国证券投资者保护基金有限责任公司(以下简称“投保基金公司”)作为国务院批准设立的投资者保护专门机构,一直高度关注并持续观测分析我国股票市场的投资者状况,为立法机构、监管部门、自律组织、市场主体开展投资者保护工作提供依据。     

经济政策不确定性、投资者情绪与中国股市波动

金融市场的稳定性与经济政策的不确定性密切相关。本文以2010年1月至2018年6月为样本期,基于投资者情绪视角,采用逐步回归法探究我国经济政策不确定性对市场波动的传导路径。研究发现,全样本时期存在显著的投资者情绪部分中介效应,经济政策不确定性的上升会显著抑制投资者情绪,进而减弱股市波动。但分样本回归结果显示,2010年1月至2015年5月股市整体上行期间,经济政策不确定性对市场波动无显著直接影响,仅存在投资者情绪的间接效应;而2015年6月至2018年6月市场整体下行期间,存在投资者情绪的部分中介效应,且中介效应仅来自个人投资者。相较于机构投资者,经济政策的不确定性更容易通过散户情绪对股市造成冲击。政府部门应重视经济政策制定出台的市场情绪面传导,及时披露相关紧急经济政策,并加强对非官方媒体的监管。     

股票市场对国有股减持的过度反应分析

国有股减持造成股票市场的结构性变动 ,并改变了市场长期以来的定价机制与价值评价标准。沪深股市对此反应程度不一 ,沪市存在过度反应的现象 ,而深市则不存在。造成市场过度反应的原因既包括结构非理性的因素 ,也有投资者非理性心理的作用。减持国有股应综合考虑市场改革的历史背景与规范化趋势、市场公平与资源配置功能的维护等因素 ,逐步推进     

投资者有限注意对我国股票市场投资者行为的影响研究

随着行为金融学的发展,人们逐渐认识到,投资者注意力成为一种稀缺资源,它增加了信息搜寻成本,对资产定价、投资决策等具有重大影响。根据投资者有限注意,通过将用户关注度作为代理变量,研究用户关注度对于沪深指数波动的影响。研究发现：在重大事件发生时注意力驱动交易对次周收益率产生显著影响;注意力驱动交易的增加会正向地影响当期成交量;同时,投资者注意力的增加会减少未来交易量。