关于权证定价修正模型的比较研究——基于交易成本和股息分红因素的分析框架

在我国股权分置改革中，权证推动了证券市场的金融创新。鉴于权证定价可以借鉴期权理论，国外B—S模型对我国权证市场的创新和风险管理具有一定的参考意义。本文采用B—S定价模型定价宝钢认购权证和长电认购权证，分别从交易成本和股息分红的角度进行了相应的模型调整，以改进、完善适应我国权证市场的定价方法。     

认购权证与标的股票间的价格相关关系实证研究

为系统分析我国认购权证市场与其标的股票市场间的价格相关关系，发现权证市场与股票市场间的联系。本文以12组样本认购权证目收盘价和标的股票的目收盘价为观测对象，运用ADF单位根检验、Johansen协整检验、向量误差修正模型（VECM）、Granger因果检验和Hasbrouck方差分解方法，考察了两个时序数列间的长期均衡关系、短期动态关系、Granger因果关系和两市在价格发现功能中作用的大小、反映信息的效率，得出了研究结论。     

权证提高了标的股票的定价效率吗——基于我国股票市场实证研究

现阶段在我国,权证提高了标的股票的定价效率了吗?本文围绕这个问题,分析了权证上市后,标的股票的波动性是否减弱、杠杆效应是否消除、长期记忆性是否减轻和系统风险是否降低.通过TARCH模型和带虚拟变量的系统风险分析模型对上述4个方面进行了分析和探讨.不可否认的是.每只标的股票都有一定的特殊性.但是参数估计的结果有助于我们认识权证对标的股票定价效率的影响.而充分认识权证对标的股票的影响有利于股票和其他金融产品定价的合理化.有利于提高金融产品的定价效率,有利于金融创新,有利于我国资本市场的健康发展.基于这些重要的理论和现实意义,本文系统分析了我国的权证对标的股票定价效率的影响,尝试给出分析我国权证影响标的股票定价效率的研究框架和模型.     

货币政策是否影响股票市场:基于中国股市的实证分析

货币政策是否影响股票市场，对该问题的回答涉及到中央银行是否有能力以及如何干预股票市场。本文运用协整检验、Granger因果关系检验、向量自回归模型等计量方法分析得出如下结论：1．货币供应量M1、M2与股市流通市值存在双向因果关系，名义利率Nr、实际利率Rr是股市流通市值Nc的Granger原因；2．中央银行可以通过货币供应量和利率两种方式影响股票市场，其中利率更有效。这些结论对于货币当局调控股票市场具有重要的借鉴意义。     

流动性对股票收益率影响的实证研究--来自沪市A股市场的结果

资本资产定价模型的缺陷使得为股票收益率寻找更显著的影响因素成为现代金融领域一个重要课题.通过在我国沪市A股市场中进行流动性对股票收益率影响的实证检验,得到结论:在沪市A股市场中,不论是在短期还是长期内,流动性对股票收益率都有重要影响.     

资本资产定价模型对青岛啤酒股票的实证研究

CAPM理论是现代金融理论的核心内容之一,可以通过预测证券的期望收益率和标准差的定量关系考察证券价格是否合理性.目前,CAPM模型对个股实证研究的文献较少.本文将应用资本资产定价模型对上海股票市场上的青岛啤酒A股(600600)进行实证检验,并将结果结合青岛啤酒股份有限公司的实际情况进行分析.     

融资融券对标的股票定价效率的影响——基于双重差分模型的实证研究

融资融券业务对标的股票定价效率的影响,可以从信息反应程度和信息反应速度两方面衡量。本文基于理论分析作出研究假设．随后通过双重差分模型进行了实证检验。结果表明,融资融券业务可在一定程度上提高标的证券的定价效率,具体表现为。在信息反应速度上提高效果显著：而在信息反应程度上虽有所提高．但并不显著。     

投资者关注与股市收益——基于股吧数据挖掘的实证分析

采用股吧发帖量衡量个股投资者关注度,并构建了市场整体的关注度指标以及关注度风险因子,通过对市场整体以及异质性股票的实证检验,结果发现:(1)总体关注度指标只对当期市场收益率有影响,对未来预测能力的影响并不显著,同时投机性较强的股票对关注度指标的敏感性更高;(2)在控制了现有定价因子(MKT、SMB、HML、MOM、ILLIQ)后,关注度因子仍然能够获得显著的正阿拉法收益;(3)多因子回归结果显示关注度因子对投资组合收益率有显著的解释能力,说明关注度因子能够为现有的定价模型带来增量信息.总体来看,采用个股关注度简单加权的市场总体关注度指标并不能对市场收益率进行有效预测,但是采用分组排序法构造的关注度因子却对市场收益率具有较强的解释能力.     

股票流动性与资产定价:基于时间序列回归的实证分析

基于上海股市分笔交易数据,以价差、报价深度、交易频率和价格影响绝对值与交易金额的比率分别作为流动性宽度、深度、即时性和弹性四个维度的替代指标,以流动性水平的非预期变化与同期股票收益率的内在联系作为出发点,采用时间序列回归方法对我国股市流动性定价问题进行了实证检验.实证结果表明流动性各个维度的非预期变化与同期股票收益率正相关,从而为股票流动性水平与股票预期收益率的负相关关系提供了新的经验证据.     

中国外汇储备的影响因素——基于1992～2011年数据的实证分析

随着我国对外开放不断扩大,我国外汇储备呈现快速增长态势,2012年我国外汇储备总量达到33116亿美元。中国外汇储备规模近年持续扩大,成为大家关注的焦点。本文基于中国经济发展现状利用E-views统计软件对1992~2011年间中国外汇储备规模影响因素的统计数据进行回归分析.在回归分析基础上尝试从实证角度对优化外汇储备规模提出建议。     

欧洲股票市场的规模和动因:基于不同β系数的资本资产定价模型实证研究

我们选用在13个欧洲股市上市的证券,形成规模和动因组合.我们不仅发现规模溢价的证据,还发现8个样本市场存在重大动因收益率.这些收益率可能不构成异常现象,因为它们与不同β值的资本资产定价模型一致.我们还发现,系统风险与经济周期有关.此外,研究结果显示,虽然规模和动因收益率显著,但是难以在中、短期利用它们,因为在我们的样本...     

Capital gains tax and the capital asset pricing model

This paper develops a version of the Capital Asset Pricing Model that views dividend imputation as affecting company tax and assumes differential taxation of capital gains and ordinary income. These taxation issues aside, the model otherwise rests on the standard assumptions including full segmentation of national capital markets. It also treats dividend policy as exogenously determined. Estimates of the cost of equity based on this model are then compared with estimates based on the version of the CAPM typically applied in Australia, which differs only in assuming equality of the tax rates on capital gains and ordinary income. The differences between the estimates can be material. In particular, with a high dividend yield, allowance for differential taxation can result in an increase of two to three percentage points in the estimated cost of equity. The overall result obtained here carries over to a dividend equilibrium, in which firms choose a dividend policy that is optimal relative to the assumed tax structure.     

对基于价值无差异的资产定价模型的实证检验——兼解释股权高溢价之谜

陈小悦和孙力强（2007）在价值无差异的基础上建立了一套全新的定价模型,本文采用股票市场的数据对该模型进行了实证检验,模型检验的同时也是对股权溢价之谜进行解释。研究结果表明,本文的定价模型在美国、中国内地和中国香港三个市场的检验都取得了良好的效果,即市场风险溢价均值都向模型的理论值收敛,实际风险溢价与理论值差异很小且不显著,采用该模型可以准确地描述股票市场组合收益率与风险的关系,并对股权溢价之谜做出合理的解释。     

Is beta still alive? Conclusive evidence from the Swiss stock market

Recent evidence from Fama and French (1992, 1996) and others shows that betas and returns are not related empirically. They interpret this as evidence against the validity of the capital asset pricing model and conclude that the beta is not a good measure of risk. This paper claims that usual tests do not leave much opportunity for beta to appear as a useful variable capable of explaining returns, because tests are often performed in periods where the average realized market excess return is not significantly different from zero. In order to assess the usefulness of beta, an alternative approach that dissociates results obtained in periods where the realized market excess is positive from those where it is negative is proposed. These new tests are then applied to a representative sample of the Swiss stock market over the period 1983–1991. The different results unambiguously support the fact that beta is a good measure of risk, because beta is strongly related to the cross-section of realized returns. These results also confirm that there are no arbitrage opportunities on this market.     

Forward and spot exchange rates in a bivariate TAR framework

Structural exchange rate models explain only a small part of the movements in dollar exchange rate. Recent empirical work has focused on the failure to account for nonlinearities in the data generating mechanism, as an explanation of this bad performance. Here two bivariate threshold autoregressive models for the spot and forward exchange rates are considered. In the first model the regimes are determined by the log difference of the two rates; in the second one the regimes are driven by the forward spot no-arbitrage condition. These processes are able to capture the ‘swing’ behaviour observed in the exchange rate market. Finally the forecasting ability of the models for the dollar/DM exchange rate is evaluated by stochastic simulation.     

中国农业居民医疗保险需求及其影响因素分析

本文基于2006年的微观横截面数据,运用似不相关二维probit模型与工具变量,分析了我国农业居民医疗保险需求及其影响因素,并着重考察了新型农村合作医疗保险与商业医疗保险之间的关系。研究的主要结论:一是参加新型农村合作医疗对乡村农业居民购买商业医疗保险有较显著的刺激作用;二是教育水平、年龄、居住省份、职业对乡村农业居民是否参加新型农村合作医疗有显著影响;职业、家庭规模和地区经济发展水平对乡村农业居民是否购买商业医疗保险有显著影响;三是在乡村农业居民是否参加新型农村合作医疗的决策中观测到逆向选择的行为。     

The Conditional Relationship Between Beta and Returns: A Reassessment

Abstract:  Several recent empirical tests of the Capital Asset Pricing Model have been based on the conditional relationship between betas and market returns. This paper shows that this method needs reconsideration. An adjusted version of this test is presented. It is then demonstrated that the adjusted technique has similar, or lower, power to the more easily implemented CAPM test of Fama and MacBeth (1973) if returns are normally distributed.