High‐Frequency Positive Feedback Trading and Market Quality: Evidence from China's Stock Market

This paper managed to measure the positive feedback trading intensity and its asymmetry with high‐frequency transaction data of China's individual stocks. The intraday positive feedback trading is found to be heterogeneous, and buying‐winners effect is significantly stronger than selling‐losers effect. In general, the high‐frequency asymmetric positive feedback trading's impact on market quality is mixed: The intraday positive feedback trades contribute to a liquid and active‐trading market but at the same time slow down the price discovery process and reduce the price efficiency.     

中国股票市场交易成本的估计

采用上证180指数成分股票的分笔交易数据,分析估计了反映中国股票市场交易成本的报价价差、有效价差和交易价差,并对它们进行了比较和相关分析。实证结果表明,我国股票市场的总交易成本约为0.25%,除指令处理成分外,还有其他的交易成本成分,而且它们会随时间的变化而增加。交易成本不仅表现出共同变动的趋势,而且还与股票的特征有关。     

中国股市政策市研究述评

文章对政策市的有关研究进行了归纳和梳理,将主要的研究概括为股市政策与政策市,政策市产生原因,不同属性政策的定性分析,政策市运行机制,政策市影响减弱分析,政策市退出市场等方面,揭示出政策市的最大问题是股市政策的行政化,政策市退出股市必须以增强投资者选择权为基础,而这需要经历一个漫长的过程。     

股指期货对股市正反馈交易行为的影响

利用正反馈交易模型与非对称冲击TARCH模型,本文实证研究了我国股指期货的推出对股市投资者正反馈交易行为的影响。结果表明：我国股市当前存在正反馈交易行为;股指期货的短期抑制效应不大,长期抑制效应渐现但不显著;股指期货有利于投资者对消息的理性反应,是抑制股市正反馈交易行为的重要原因。     

Risk Perception in the Short Run and in the Long Run

There is an ongoing controversy in financial economics regarding the role of time horizon in portfolio selection. This problem is relevant in a broader context, wherever consumers or managers make decisions that involve both time and risk. The purpose of this paper is to review recent findings from the decision making literature so as to shed new light on how the short run vs. long run contingency may determine risk taking and perception.     

China's Stock Market:New Year,New Trends

After experiencing two years of a bull market,the A-share market will be faced with more change and uncer- tainty in the Year of the Rat, and for China's stock market as a whole it will also be an extraordinary year.     

中国股票市场流动性风险分析

本文旨在为中国股票市场流动性风险管理提供一种实用的风险测量方法和数据基础.研究模型的构建基于VaR方法.考虑到行业与地域因素是影响股票价格波动的重要因素,本文以行业、地域为依据从沪深两市中选取样本,每个行业不同地区选取市值最大的前3只股票分析,总体样本规模是121只.研究结果表明,我国个股流动性风险水平参差不齐,部分股票流动性风险较大;从行业来看,沪市的医药、生物制品业流动性风险较大,深市的木材、家具业流动性风险较大;从地区来看,西部地区的流动性风险要高于其他两个地区;深市整体流动性风险水平要略高于沪市.基于上述分析,本文建议从完善市场交易机制、加强信息披露制度建设、加强与流动性相关的法律法规政策建设等方面强化风险管控措施.     

Individual Investor's Insight:Joys and Sorrows in China's Stock Market

In the past 18 months,China's stock market staged a soul-stirring and exciting drama.The ups and downs of the index seemed to be the only important number in people's life.From an eight-year low of 998.22 points in mid 2005,China's stock market has been on a bullish run to the point where the bench- mark Shanghai Composite Index at one point topped the 6,000 point barrier. After peaking at 6,092.06 points on October 16th,2007,it seems China's stock market has passed a crossroad and has since been on a downward trend.     

周期效应与中国股市之实证分析

本文认为,中国股市没有出现像美国股市那样的周末效应。本文并不证明中国股市就是个有效市场。它只能说明,在否定有效市场的诸多现象中,周期效应可以被排除。目前的中国股市既不是完全有效市场也不是完全无效市场,而是一个有一定有效性的市场。政策、公司业绩、信息、炒作、资金等因素都在影响中国股市。如果借助一些分析方法寻找价格被低估的证券,将可以为投资者获得超额收益。     

我国首次公开发行股票长期市场表现实证研究

本文借鉴西方关于IPO的研究成果,结合我国股市的实际,选取沪市358只和深市244只股票作为研究样本,计算其自上市之日起一年半时间段的平均累积超额收益率,以分析我国股市是否存在新股长期市场表现失常现象,同时进一步分析了不同行业以及不同发行规模的股票的新股长期市场表现。     

Individual Investor's Insight: Joys and Sorrows in China's Stock Market

In the past 18 months,China's stock market staged a soul-stirring and exciting drama.The ups and downs of the index seemed to be the only important number in people's life.From an eight-year low of 998.22 points in mid 2005,China's stock market has been on a bullish run to the point where the benchmark Shanghai Composite Index at one point topped the 6,000 point barrier.     

基于时变Copula的我国股票市场联动性研究

通过运用Copula技术,构建4种Copula-GARCH模型,讨论金融市场的相关模式问题得出的结论是Joe-ClaytonCopula比正态Copula好,动态模型比静态模型要好。表明沪港股市确实存在非对称的相关变化规律。同时表明沪、港股票市场股市相关程度较小,两个市场联动性较弱,上海股市的波动具有相对的独立性,通过组合上海股市和香港股市的方式可以较好的降低投资风险。     

我国股票市场涨跌幅限制的作用机制及其影响因素

文章在现有文献研究的基础上引入公司治理水平,建立比例logist模型,区分涨幅和跌幅限制、牛市和熊市的不同情况来研究中国股票市场涨跌幅的作用机制及其影响因素.为了得到可靠结果,模型采用GMM估计,处理了异方差和内生性问题.实证结果表明:系统风险、非系统风险与流动性越大,对股票达到涨跌停板的影响就越大;公司治理结构越好,对股票撞击涨跌幅限制的影响就越小;在牛市与熊市期间涨跌幅限制影响因素的作用具有较大差别.本文研究结果为监管机构因类、适时地调整涨跌幅限制幅度提供了依据.     

中国证券投资基金评价体系研究

一、建立中国证券投资基金评价体系的意义 中国证券投资基金业的发展迅速,从1998年开始试点到2000年底,已发展到33只基金,规模达到560亿元,流通市值722亿元,占两市当日流通市值的10%,而且种类在不断增加,开放式基金正在酝酿,不久将推出,特别是保险资金和社保资金入市以及规模巨大的城镇居民储蓄使证券投资基金在中国存在着的极大的发展空间,其对中国的金融业及整个国民经济的发展都将产生深刻的影响.     

Long Yongtu on China's Service Market Opening Further to the World

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Mean-Reversion and Long Memory in the Stock Market Indexes of Some Latin American Countries

ABSTRACT

In this paper we examine the mean-reversion and long-memory properties in the stock market indexes of some Latin American countries by means of fractional integration. In doing so, we allow for a much richer degree of flexibility in the dynamic behaviour of the series not achieved when using the classical representations based on I(0) or I(1) processes. We use a semiparametric local Whittle estimator based on the frequency domain. The results show that the order of integration of the series is higher than 1 for Argentina, Venezuela and Colombia and is around 1 or slightly higher for Mexico. The results also show that the unit root cannot be rejected for the case of Brazil. Splitting the samples around the periods of crisis, we find long-memory stock market returns in the pre-crisis period for all countries except Brazil. However, using post-crisis data, the unit-root cannot be rejected, which might be consistent with the Efficient Market Hypothesis. A notable exception is the case of Colombia, where long memory is also found in the returns for the post-crisis period.

RESUMEN. En este estudio examinamos las propiedades de la reversión media y de la memoria prolongada en los índices del mercado bursátil en algunos países latino-americanos, a través de la integración fraccional. Utilizando este método, permitimos la ocurrencia de una flexibilidad mucho más rica en el comportamiento dinámico de las series, que no se puede lograr con el uso de las representaciones clásicas, basadas en los procesos I(0) o I(1). Utilizamos un estimador Whittle local semiparamétrico, fundamentado en el dominio de la frecuencia. Los resultados obtenidos muestran que el orden de integración de la serie es mayor a 1 para Argentina, Venezuela y Colombia, y alrededor de o poco más de 1 para México. Además, los resultados también demuestran que, en el caso brasileño, no puede rechazarse la unidad raíz. Al dividir las muestras alrededor de los períodos de crisis, descubrimos que el mercado bursátil con memoria prolongada vuelve a aparecer en el período pre crisis en todos los países menor Brasil. Sin embargo, si usamos los datos post crisis no podemos rechazar la unidad raíz ya que la misma puede ser coherente con la Hipótesis del Mercado Eficiente. Una excepción notable esel caso de Colombia, donde la memoria prolongada también se encuentra en los retornos para el período post crisis.

RESUMO. Neste artigo examinamos as propriedades de reverãs média e memória longa nos índices de mercados de aç[otilde]es de alguns países latino-americanos por meio da integração fracionária. Com isto, permitimos um grau de flexibilidade bem maior no comportamento dinâmico da série, não obtida quando se usam representaç[otilde]es clássicas baseadas nos processos I(0) e I(1). Empregamos um estimador Whittle local semiparamétrico baseado no domínio da freqüência. Os resultados mostram que a ordem de integração das série é maior que 1 para a Argentina, Venezuela e Colômbia e em torno de 1 ou ligeiramente maior para o México. Os resultados também mostram que a raiz unitária não pode ser rejeitada para o caso do Brasil. Dividindo-se as amostras em torno dos períodos de crise, encontramos retornos de mercado de aç[otilde]es de memória longa no período pré-crise para todos os países, exceto o Brasil. Entretanto, usando dados pós-crise, a raiz unitária não pode ser rejeitada, o que poderia ser compatível com a Hipótese do Mercado Eficiente. Uma exceção notável é o caso da Colômbia, onde a memória longa também se encontra nos retornos para o período pós-crise.     

深沪股市1992—2001年季节性波动的实证研究

股票市场季节性波动是股票投资收益的短期波动理论 ,这种现象在许多国家的股票市场中存在。通过对我国股市 1 992至 2 0 0 1年的实证研究 ,发现我国股市出人意料地不存在显著的季节性波动     

中国股市风格溢价双长记忆性研究

利用中国股市风格资产在日、周、月和季频率上的数据（2000-2013）,本文引入偏t分布作为新息分布来描述中国股市规模溢价和价值溢价分布存在的“尖峰厚尾”特征,根据最小化信息准则构建ARFIMA-YHGARCH-skt模型,以刻画中国股市风格溢价序列收益过程和波动过程的双长记忆性。研究表明中国股市并不存在显著的规模溢价,只存在显著的价值溢价：在收益过程方面,规模溢价具有收益长记忆性,但并不显著;而价值溢价在日、月和季度频率上的序列具有显著的收益长记忆性;在波动过程方面,规模溢价和价值溢价均在日、周频率上的序列具有显著的波动长记忆性。     

证券交易税对市场波动性的影响:来自中国股市的证据

本文运用ARCH族模型检验了2001年股票交易印花税税率降低对沪、深股市波动性的影响,为有关证券交易税对市场波动性影响的讨论增添了一个来自新兴市场的证据。计量结果表明,该次税率变动对沪市波动性的影响在统计上是不显著的;深市的波动性在税率降低后虽然有统计上显著的增加,但是这个变化太小,没有实际意义。我们的研究结果表明,对于像中国股市这类市场结构和市场制度处于变化之中的新兴市场,如果试图通过调整证券交易税税率这类显性的交易成本来影响市场波动性,其效果是有限的。