我国股票市场指数与国际股票市场主要指数的联动性研究——基于协整分析

本文对2012~2015年中国股票市场与国际主要股票市场的每日收盘数据进行统计分析,运用协整检验实证了上证综合指数分别与国际四大股指指数之间存在协整关系。中国股市与国际股市之间逐渐接轨,中国股票市场日趋成熟。     

汇率与股价关联的实证研究——基于汇改后中国大陆、台湾、香港的数据

通过运用协整检验和格兰杰因果检验对汇率制度改革后中国大陆、台湾、香港的股市与汇市关系的实证结果表明,中国大陆汇市与股市存在长期稳定的协整关系,短期相互影响明显;台湾汇市与股市只存在短期的相互效应;香港数据表明两者不存在因果关系,但方差分解显示股市变动对汇率波动有一定的冲击效应.     

汇率制度改革后中国股市与汇市关系——人民币名义汇率与上证综合指数的实证研究

本文利用协整检验和Granger因果检验的计量方法研究了汇率制度改革后中国股市与汇市的关系。实证结果表明,汇率制度改革后中国股市与汇市存在长期稳定的协整关系,人民币升值是中国股市上扬的单向Granger原因。最后,本文利用国际收支和资本流动理论对这些实证结果作了进一步解释,并提出了相应的政策建议。     

O-F模型与合理市盈率研究--中国股市泡沫的实证分析

市盈率是被广泛用来测量股市泡沫风险的一个重要指标。本文根据O-F模型（基于账面价值和未来剩余收益的定价模型），导出衡量股市泡沫的合理市盈率计算公式，并以此考察了中国的股市泡沫。通过分析发现市盈率的合理值是一个动态值，主要由企业各期的净资产、收益、净资产收益率、持续盈利能力等内生变量决定，不存在一个固定的合理市盈率来测量股市的泡沫程度。计算表明中国的股市泡沫白1993年以来呈明显下降趋势，且2001逐步形成以来，我国股市基本上不存在投机性泡沫，股市运行处于比较理性的阶段。     

国际石油价格与中美股票市场影响关系的计量分析

本文应用VAR模型和误差修正模型,研究了中美股市价格和国际石油价格间的关系,及油价对中国股市板块指数的影响。研究表明国际石油价格同中美股市指数都存在协整关系,在油价与美国股市指数的关系中,油价处于主导地位;在油价与中国股市指数的关系中,两者没有一个处于主导地位,变动影响主要由自身所解释。板块研究中金融、航空、石油、有色金属、钢铁和造纸板块与油价有长期协整关系,油价在其中占主导地位。     

汇率波动、外部风险蔓延对我国股市的影响机制研究

基于结构突变的新视角,重新审视人民币汇率、中美股市和利差因素之间的相互影响机理.通过内生变结构协整检验实证发现,样本期内几个金融子市场间的长期均衡关系出现了两次结构突变,汇率与股市间的关系符合流量导向型模型,汇率始终处于主动地位,存在着从汇率到股价的非对称性价格溢出效应;而在市场间联动性上,存在从美国股市到国内股市的非对称性价格溢出效应;全球金融危机是协整关系出现第一次结构突变的直接原因,而这种市场间的相互影响机制则在突变之后逐渐减弱.     

基于VAR模型的房地产市场与股市关系研究

本文通过建立VAR模型研究了1998年第一季度至2007第四季度,全国房地产市场和股票市场价格波动之间的关系,利用Jonhansen协整检验发现房地产市场与股市之间具有明显的协整关系,运用Granger因果检验发现股市是房地产市场单向的Granger原因,最后利用VAR模型中的脉冲响应函数和方差分解技术,定量的得出房地产价格和股票价格在各自预测误差中贡献度,最后得出结论。     

我国股市与货币需求的相互影响分析及政策涵义

运用协整、弱外生性和因果关系检验对我国股票市场与货币需求的关系进行的实证研究发现,股市不影响M2的总量但影响其结构;M1对股市不产生直接影响,而M2对股市的直接影响处于有与无的临界状态;M1、M2均通过GDP对股市产生间接影响,但没有形成利率传导机制,我国股市是关于协整向量的弱外生变量.基于以上结论提出了相应的政策建议.     

我国宏观经济、上市公司和股市之间关系的实证研究

本文从宏观经济、上市公司业绩、股市发展三者之间的传导机制出发,利用协整检验、格兰杰因果分析等计量方法,对我国2002-2014年的季度数据进行分析,探究三者之间的传导路径,得出结论:中国宏观经济与上市公司存在长期均衡的反向异常关系,上市公司业绩与股市发展存在长期均衡的正向关系,股市和经济之间不存在协整关系,然后从我国的基本国情出发,分析出现异常现象的原因.     

基于齐次马氏域变方法的中国股市价格泡沫检验

本文使用间接度量方法构建了股市价格泡沫的理论模型,得到了股市价格泡沫所满足的行为方程。在该理论模型下,本文利用Johansen协整检验方法从上证指数1996年1月到2007年12月的数据中剔除其理性价值成份,并进而建立马氏域变模型对其泡沫情况进行分析,结果表明上证指数价格泡沫主要集中于1996年3月到1997年6月、1999年全年以及2006年11月到2007年12月。此外,本文还通过对深证指数的分析检验了沪深两市股价泡沫的联动性,最后根据文章分析结果,提出了相应的政策建议。     

Market efficiency,managerial compensation,and real efficiency

We examine how an exogenous improvement in market efficiency, which allows the stock market to obtain more precise information about the firm's intrinsic value, affects the shareholder–manager contracting problem, managerial incentives, and shareholder value. A key assumption in the model is that stock market investors do not observe the manager's pay-performance sensitivity ex ante. We show that an increase in market efficiency weakens managerial incentives by making the firm's stock price less sensitive to the firm's current performance. The impact on real efficiency and shareholder value varies depending on the composition of the firm's intrinsic value.     

基于LPPL模型的股市泡沫研究——兼论主权债务危机时国际援助计划效果

运用 LPPL模型对主权债务危机时期希腊股市泡沫状态进行判断,考量各轮援助计划的实施效果.结果表明:在第一轮援助期内,股市处于负泡沫状态;而在第二轮援助期与第三轮援助期内,股市局部处于反转负泡沫状态,但整体依旧处于负泡沫状态.国际援助计划虽然有所助益,但没有从根本上有效改善其市场低迷状态.为避免发生此类危机,应促进实体经济健康发展,密切关注政府债务问题,注重货币政策与财政政策相协调.     

The rise in comovement across national stock markets: market integration or IT bubble?

A stylized fact in the portfolio diversification literature is that diversifying across countries is more effective than diversifying across industries in terms of risk reduction. But with the rise in comovement across national stock markets since the mid-1990s, this no longer appears to be true. We explore if this change is driven by global integration and therefore likely to be permanent, or if it is a temporary phenomenon associated with the recent stock market bubble. Our results point to the latter hypothesis. In the aftermath of the bubble, diversifying across countries may therefore still be effective in reducing portfolio risk.     

Speculative bubbles and the cross-sectional variation in stock returns

Evidence suggests that rational, periodically collapsing speculative bubbles may be pervasive in stock markets globally, but there is no research that considers them at the individual stock level. In this study we develop and test an empirical asset pricing model that allows for speculative bubbles to affect stock returns. We show that stocks incorporating larger bubbles yield higher returns. The bubble deviation, at the stock level as opposed to the industry or market level, is a priced source of risk that is separate from the standard market risk, size and value factors. We demonstrate that much of the common variation in stock returns that can be attributable to market risk is due to the co-movement of bubbles rather than being driven by fundamentals.     

Deconstructing the Nasdaq bubble: A look at contagion across international stock markets

Share prices for the technology, media, and telecommunication (TMT) sector experienced phenomenal growth and decline at the turn of this century in the U.S. and many other OECD economies. We investigate whether contagion occurred from the U.S. to other international stock markets after the Nasdaq bubble collapsed. Results document a significant structural break in comovements between the international TMT sectors, and suggest that the collapse of the stock market in more than a dozen countries is tied to close sectoral links (particularly in TMT), and cannot be attributed to widespread contagion. We also show the importance of modeling the intrinsic heteroskedasticity in the data using a GARCH framework for inferences on contagion.     

股票流动性与中国企业创新策略:流水不腐还是洪水猛兽？

中国情境下股票流动性对企业创新的影响是激励机制还是压力机制占主导地位？本文基于上市公司分类专利的申请、授权、终止数据研究发现:一方面,股票流动性使企业发明专利申请显著增加,但能通过实质审查的授权增长极少,说明申请质量明显下滑;另一方面,股票流动性使创新含量较低的实用新型与外观设计授权显著增加,且这些专利拖累了企业盈利表现,法律效力提前终止的数量也明显更多,揭示企业实际上是以“策略性创新”来应对资本市场压力,加剧了“专利泡沫”问题。分样本检验发现,“重数量轻质量”的创新策略集中体现于民营、传统行业及长期机构投资者持股较少的企业。稳健性检验替换关键指标构造和模型估计方法、构造工具变量克服潜在内生性问题,前述结论仍然成立。本文启示,金融制度设计应防范资本市场压力对企业创新的“意外伤害”,更好地实现“以金融助实体、以改革促发展”的目标。     

首日涨停板制度与IPO解禁效应——基于投机泡沫视角的分析

本文以2006—2016年上市的1397家公司为研究样本,实证检验了首日涨停板制度对新股解禁效应的影响。结果发现:首日涨停板制度实施期间发行的新股,解禁时有显著更差的市场表现,[-30,30]窗口期间的超额回报低至-8.43%,同时有更小的异常交易量和异常波动率;新股上市时股价高估程度越大、投资者情绪越高,首日涨停板制度对解禁效应的影响越强。上述结果支持了Hong et al.(2006)提出的“解禁与资产泡沫破灭”的理论,即首日涨停板制度导致新股发行后投机泡沫累积,投机泡沫破灭导致解禁时更大幅度的股价下跌。本文的研究结论补充了首日涨停板制度后果的文献,并对防范金融风险和完善新股市场化改革具有一定的政策参考价值。     

优化股市政策化解股市失灵

目前我国股市缺乏吸引力源于股市失灵,其特征为市场机制失灵和政府政策失灵共存.股市失灵的真正原因总是归根为政策失灵.化解股市失灵关键是采取积极的态度,不断改革、创新,从根本上消除股市理论失灵,以优化政策资源配置,促进我国股市健康、稳定发展.     

Empirical evidence of the existence of speculative bubbles in the prices of stocks traded on the São Paulo Stock Exchange

Speculative price bubbles are defined as a significant deviation between an asset's intrinsic value and its market value and in this paper it refers to stock values. Literature about the theme has noted the existence of bubbles in various types of markets and their respective assets. A great deal of effort has been directed toward identifying bubbles in stock price indices. However, few research endeavors focus on assets as the unit of analysis. Studies about stocks in Brazil have identified the presence of bubbles in IBOVESPA (São Paulo Stock Exchange Index). Given this context and assuming that the speculative bubbles are present in the Brazilian stock market, this research is focused on the following question: Is there evidence of the existence of speculative bubbles in stock prices traded on the São Paulo Stock Exchange? Econometric tests were performed on twenty-seven stocks, based upon their positions each semester, for the period between the first semesters of 1990 until the first semester of 2010. The nominal values of the selected stocks were adjusted for inflation by the IPCA (Brazilian Consumer Price Index). In order to identify the presence of bubbles, we applied the Johansen non-cointegration test and/or the Granger non-causality test between the intrinsic value, dividends and interest on equity capital, and the market value (semester closing price) of the stocks. The primary findings reveal a presence of bubbles in twenty of the twenty-seven stocks, at a 5% significance level. Of the seven stocks not showing evidence of bubbles, six are financial institutions. In five stocks the tests reveal Granger causality stemming from the market value toward the intrinsic value. The study findings are consistent and contribute with previous research in the literature and, are useful for investors, financial institutions, academics, government agents, and traders.     

Go long or short in pyramids? News from the Egyptian stock market

Similar to other emerging economies, the Egyptian stock market has recently experienced a remarkable run-up but also a major downturn. This paper analyzes the stock market from two angles. First, it compares the performance of the major stock price index with its underlying fundamentals. Second, it explores the relationship between the Egyptian and other stock markets. The paper finds that (i) there is some evidence against a stable relationship between the Egyptian index and its fundamental value; and (ii) short-term correlations and long-term cointegrating relations provide conflicting signals on the value of Egyptian stocks as a means of diversification.