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1.
SHFE与LME期铜价格关系实证研究   总被引:6,自引:0,他引:6  
本文介绍了Granger引导关系模型,并利用这个模型对伦敦金属交易所(LME)三个月期铜和上海期货交易所(SHFE)五个月期铜进行了价格引导关系检验。检验结果显示,伦敦金属交易所三个月期铜价格滞后引导上海期货交易所五个月期铜价格,但是上海期货交易所对伦敦金属交易所的期铜价格不具有滞后价格引导关系。  相似文献   

2.
利用Johansen协整检验、Granger因果检验以及向量误差修正(VEC)模型、脉冲响应分析和方差分解分析,从三个不同的角度对我国铝期货、铝现货和废铝市场价格间的动态关系进行了实证分析,研究结果表明:从引导关系看,铝期货价格与铝现货价格之间具有协整关系,并且铝期货价格对铝现货价格及废铝价格具有单向价格引导关系,铝现货价格对废铝价格具有单向价格引导关系;从冲击反应看,铝期货对铝现货的冲击比较强烈,而铝期货对废铝以及铝现货对废铝的冲击相对比较和缓;从价格发现程度看,铝期货市场具有最强的价格发现能力,铝现货价格发现能力次之,废铝的价格发现能力最弱,表明铝期货是价格发现过程的主要驱动力量.  相似文献   

3.
上海燃料油期货市场价格发现功能的实证研究   总被引:1,自引:0,他引:1  
赵茜  王书平 《运筹与管理》2007,16(2):98-101,153
本文利用协整检验、Granger因果检验、误差修正模型和Garbade-Silber模型对上海燃料油期货的价格发现功能进行了探讨,分析了期货与现货价格之间的相互关系,刻画了期货与现货市场在价格发现功能中作用的大小,并由此说明上海燃料油期货市场的效率。结果表明,燃料油的期货价格与现货价格之间存在协整关系,期货市场具有良好的价格发现功能,这对我国建设完整的石油期货市场具有指导意义。  相似文献   

4.
基于VAR模型的我国生猪饲料价格影响因素研究   总被引:2,自引:0,他引:2  
本文以向量自回归(VAR)模型为基础,运用在此基础上的Johansen协整检验、格兰杰因果检验、方差分解和脉冲响应分析等技术,综合考察了中美玉米期货市场和国内生猪市场对我国生猪饲料产业的价格发现和引导功能。研究发现:芝加哥玉米期货价格、大连玉米期货价格、国内生猪价格和生猪饲料价格之间存在着长期均衡关系,并且对饲料价格分析的总方差中来自于芝加哥玉米期货价格、大连玉米期货价格、国内生猪价格的部分分别为15.28%、11.99%和41.95%,三者的总贡献率达到了69.22%,说明三者对生猪饲料价格具有良好的价格发现和引导功能,而三者当中国内生猪价格的影响最大。进一步的脉冲响应分析也证明国内生猪价格在影响力度和影响时效上都强于两个玉米期货价格。  相似文献   

5.
本文区分国内外期铜市场价格的长记忆成分和短期波动溢出效应,采用信息共享模型和永久一瞬时模型分离出不同期铜市场价格间的长记忆成分,得到不同市场期铜价格对"隐含有效价格"的贡献度;而且,利用t分布的BEKK模型分析两个市场期铜价格的短期波动溢出.特别,我们在BEKK基础上定义了不同变量间的波动溢出项,对两个市场期铜价格的波动溢出进行了度量.根据测算结果,我们发现国内外期铜价格有着紧密的联系,无论在长期,还是在短期,国外市场期铜价格的影响力都较大.  相似文献   

6.
李江涛  谭清 《经济数学》2010,27(4):98-104
通过建立向量误差修正模型并运用信息份额模型对市场间共同价格发现的贡献大小进行定量分析.借助Engle-Granger的协整检验方法对人民币外汇市场,即境外人民币NDF汇率、境内人民币远期汇率以及人民币即期汇率市场三个市场两两之间的动态关系进行探讨.研究表明,在价格发现的领域,满足协整关系的两汇率市场间确实存在着一个共同变化的趋势即共因子(common factor),它们之间有着共同的价格发现机理过程.  相似文献   

7.
梳理了期货市场价格发现效率研究方法的发展历程,并从价格发现功能的存在性和价格发现的贡献度两个方面对我国五年期国债期货市场的价格发现效率进行了实证分析.结果显示,我国五年期国债期货市场已经具备了价格发现能力,并且MIS模型测度的价格发现贡献度达到98.27%,远远超过现货市场.结果表明,当前我国国债期货市场已经具备了较高的价格发现效率,在市场信息传递中发挥了重要作用,合约的设计基本实现了利率市场价格发现的功能.  相似文献   

8.
长期以来对期货市场与现货市场价格关系的实证研究都是基于时间序列方法的研究.为了克服时间序列方法存在着的不足,将使用面板数据方法,在面板单位根检验以及面板协整检验和协整估计的基础上,构建面板误差修正模型来分析期货价格和现货价格的均衡以及相互引导关系.进一步的,在误差修正模型的基础上我们采用信息份额方法(I-S模型)和共同因子贡献法(P-T模型)分析了期货市场和现货市场的价格发现功能.通过上述研究,发现总体上讲我国大宗商品的期货价格和现货价格之间存在着长期均衡,并且表现出了相互引导互为Granger因果的关系.利用I-S模型和P-T模型测算出来的期货市场对价格形成的贡献度分别为88.17%和79.44%,这说明当前我国的期货市场总体上讲是有效率的市场.  相似文献   

9.
随着中国经济增长、城市化的发展,房价不断攀升,居民面临巨大的购房压力,而政府也开始对房地产市场进行调控,在房价构成因素中,土地成本占有很大比重,因此土地价格,土地供应面积与房地产价格之间的关系研究对促进房地产市场的合理发展有十分重要的意义.以2002年到2011年我国土地供应面积,土地购置价格和房地产价格的月度数据为样本,对土地供应面积,土地购置价格与房地产价格进行协整检验后,构建VAR模型进行格兰杰因果检验后发现土地供应价格,面积和房地产价格互为因果;对城市土地购置价格和房地产价格进行脉冲响应分析和方差分解后发现房地产价格和土地价格之间的存在相互影响,且在短期内都受土地供应面积的影响但程度不高.  相似文献   

10.
运用了Granger因果检验、脉冲响应函数、VEC模型以及BEKK模型,对沪铜期货与现货市场的价格发现与波动溢出效应进行实证分析.实证结果表明:期货价格与现货价格存在着长期均衡关系和Granger双向引导关系,在价格发现中,期货市场占主导地位,且比现货市场有着更强的信息效应;期货市场与现货市场各自的波动持久性均显著,而两者间的交叉波动效应相对较小,但是现货市场来自期货市场的波动溢出效应大于期货市场来自现货市场的波动溢出效应.  相似文献   

11.
再论中国股票市场的弱有效性   总被引:3,自引:1,他引:2  
张敏  陈敏  田萍 《数理统计与管理》2007,26(6):1091-1099
本文利用检验鞅差序列的非参数统计量来检验中国股票市场的弱有效性问题,本文给出的方法不同于文献中已有的方法,实证分析表明本文使用的检验股票市场弱有效的方法比文献中的大多数方法更有效。实证结果显示,中国的股市在发展过程中,表现山渐进有效的态势;中国A股市场比B股市场更有效率:沪市比深市更趋于有效。文中的有些结论是以前的实证研究所没有的。另外,本文比较了中国股市和境外成熟股市之间有效性程度的差异,并得出香港市场对深市影响显著的结论。  相似文献   

12.
This paper shows that tests of Random Number Generators (RNGs) may be used to test the Efficient Market Hypothesis (EMH). It uses the Overlapping Serial Test (OST), a standard test in RNG research, to detect anomalous patterns in the distribution of sequences of stock market movements up and down. Our results show that most stock markets exhibit idiosyncratic recurrent patterns, contrary to the efficient market hypothesis; also that OST detects a different kind of non-randomness to standard econometric long- and short-memory tests. Exposure of these anomalies should contribute to making markets more efficient.  相似文献   

13.
Unlike physical time series, stock market prices may be affected by the predictions made by market participants with conflicting interests. This is the domain of game theory. Therefore, we propose a Stock Exchange Game Model (SEGM) to model this phenomenon. In SEGM, player strategies are to set their buying and selling levels for the next iteration via the autoregressive model AR(p) of order p selected by minimizing deviations from Nash Equilibrium (NE). NE represents the assumption of optimal behavior by market participants. The objective of SEGM is to simulate financial and other time series that are affected by predictions of the participants and to test the assumption of optimal player behavior, using a ‘virtual’ stock exchange. The simulation of SEGM suggests that NE is close to the Wiener model. This is a new explanation of the Random Walk (RW) model of the efficient market theory. To compare the simulation results with real data, the efficient market hypothesis was also tested, using financial time series of eight assets. The SEGM software is implemented in Java applets and can be run using a browser with Java support. The main web site is in .  相似文献   

14.
The stock markets from Post Communist East-European Countries are still considered highly speculative. For this reason, the previously performed tests often infirmed the efficient market hypothesis. However, especially in the past years, different studies revealed an improvement in the level of efficiency. In this context, our paper has tested the predictability of returns based on past records (as a proxy for the weak-form efficiency) for the market index and the most important stocks of 20 East European former communist countries: Bosnia-Herzegovina, Bulgaria, Croatia, Czech Republic, Estonia, Georgia, Hungary, Kazakhstan, Latvia, Lithuania, Former Yugoslav Republic of Macedonia, Moldova, Montenegro, Poland, Romania, Russia, Serbia, Slovakia, Slovenia, and Ukraine, for the period January 2008–December 2010, a period of financial crisis for most of these countries. Various methods for testing were used (unit root tests, runs test, variance ratio test, filter rules test and the January Effect). The tests have revealed that for some assets the efficient market hypothesis cannot be rejected. However, the results have shown that there are serious doubts concerning the stock market efficiency for all the countries in the analyzed period. Moreover, heterogeneity between the results for different countries was revealed. A higher level of market efficiency can suggest to decision-makers the use of passive portfolio management techniques while a lower level of efficiency implies the use of active portfolio management instruments.  相似文献   

15.
In this study, we test the semistrong form of the efficient market hypothesis in Turkey by using the recently developed techniques in time series econometrics, namely unit roots and cointegration. The long run relationship between stock prices and inflation is investigated by assuming the possible existence of a proxy effect. Conclusions are made as to the efficiency of the Turkish Stock Exchange and its possible implications for investors. To our knowledge, this is among the pioneering studies conducted in an emerging market that uses an updated econometric methodology to allow for an analysis of long run steady state properties together with short run dynamics.  相似文献   

16.
本文提出了离散均值-方差投资组合模型的一种新的精确算法.该算法是一个基于拉格朗日松弛和Bundle对偶搜索的分枝定界算法.我们分别用随机产生的数据和美国股票市场的真实数据进行了数值实验,并与传统次梯度对偶搜索进行了比较,数值结果表明本文提出的算法对解决中小规模的离散投资组合问题是有效的.  相似文献   

17.
In order to study the effect of different risk measures on the efficient portfolios (frontier) while properly describing the characteristic of return distributions in the stock market, it is assumed in this paper that the joint return distribution of risky assets obeys the multivariate t-distribution. Under the mean-risk analysis framework, the interrelationship of efficient portfolios (frontier) based on risk measures such as variance, value at risk (VaR), and expected shortfall (ES) is analyzed and compared. It is proved that, when there is no riskless asset in the market, the efficient frontier under VaR or ES is a subset of the mean-variance (MV) efficient frontier, and the efficient portfolios under VaR or ES are also MV efficient; when there exists a riskless asset in the market, a portfolio is MV efficient if and only if it is a VaR or ES efficient portfolio. The obtained results generalize relevant conclusions about investment theory, and can better guide investors to make their investment decision.  相似文献   

18.
In order to study the effect of different risk measures on the efficient portfolios (frontier) while properly describing the characteristic of return distributions in the stock market, it is assumed in this paper that the joint return distribution of risky assets obeys the multivari-ate t-distribution. Under the mean-risk analysis framework, the interrelationship of efficient portfolios (frontier) based on risk measures such as variance, value at risk (VaR), and expected shortfall (ES) is analyzed and compared. It is proved that, when there is no riskless asset in the market, the efficient frontier under VaR or ES is a subset of the mean-variance (MV) efficient frontier, and the efficient portfolios under VaR or ES are also MV efficient; when there exists a riskless asset in the market, a portfolio is MV efficient if and only if it is a VaR or ES efficient portfolio. The obtained results generalize relevant conclusions about investment theory, and can better guide investors to make their investment decision.  相似文献   

19.
In order to study the effect of different risk measures on the efficient portfolios (fron- tier) while properly describing the characteristic of return distributions in the stock market, it is assumed in this paper that the joint return distribution of risky assets obeys the multivariate t-distribution. Under the mean-risk analysis framework, the interrelationship of efficient portfolios (frontier) based on risk measures such as variance, value at risk (VaR), and expected shortfall (ES) is analyzed and compared. It is proved that, when there is no riskless asset in the market, the efficient frontier under VaR or ES is a subset of the mean-variance (MV) efficient frontier, and the efficient portfolios under VaR or ES are also MV efficient; when there exists a riskless asset in the market, a portfolio is MV efficient if and only if it is a VaR or ES efficient portfolio. The obtained results generalize relevant conclusions about investment theory, and can better guide investors to make their investment decision.  相似文献   

20.
This paper introduces the notion of Market Equilibrium With Active Consumers (MEWAC), in order to characterize the efficiency of market outcomes in production economies. We show that, no matter the behaviour followed by the firms, a market equilibrium is efficient if it is a MEWAC. And also that every efficient allocation can be decentralized as a MEWAC in which firms follow the marginal pricing rule.  相似文献   

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