股指期货与现货市场关系的实证研究——金融危机中的香港恒生指数及其期货

通过截取从金融危机开始深化的2008年6月到澳大利亚首次加息的2009年10月的香港恒生指数现货及其股指期货的日交易数据,研究金融危机对股指现货和期货市场的影响,使用了向量自回归模型、Johansen协整检验和VEC模型等方法研究了二者关联性问题与相互影响关系问题。结果显示,期货市场与现货市场在长期有很强的相关性,而且股指期货市场有很好的价格发现的功能。我国应该尽快完成完善股指期货的准备工作,期待即将推出的股指期货。     

中国农产品期货市场有效性的实证分析——以农产品玉米为例

本文运用向量误差修正模型、脉冲响应和方差分解等计量经济学方法对中国近5年来玉米期货市场与现货市场价格之间的相关性、期货市场价格的有效性、期货与现货价格之间的相互引导关系进行实证分析.发现:期货价格与现货价格表现出较强的正相关,存在长期均衡关系;当二者偏离均衡状态时,能以较快的速度回到均衡;期货价格和现货价格对自身的标准差信息有较强烈的反应,但相互之间的影响相对较小.因此,我们应进一步扩大期货市场交易规模,增加粮食期货品种数量,完善农产品价格市场形成机制,从而进一步增强期货市场与现货市场之间的联动关系.     

基于高频数据的沪深300指数期货价格发现能力研究

从股指期货和现货对新信息的反应速度、新信息融入比率两个角度,研究了沪深300股指期货的价格发现能力。研究采用了沪深300指数期货和现货的1分钟高频数据进行实证分析,使用向量误差修正模型和脉冲响应函数分析的结果表明,股指期货市场对新信息的反映速度快于现货市场。使用I-S模型和P-T模型实证分析的结果表明,新信息主要通过沪深300指数期货市场进行反映。从新信息反映速度和融入比率两方面来看,沪深300指数期货市场的价格发现能力都要强于指数现货市场。     

中国股指期货与现货关系的实证研究——基于沪深300股指期货

股指期货与现货的关系一直是一个研究热点。但是这些研究主要基于国外股指期货或沪深300股指期货仿真交易,而对正式推出后的沪深300股指期货的研究很匮乏。文章利用相关性分析和Granger因果检验分析了沪深300股指期货对现货之间的价格发现功能,利用GARCH类模型分析了沪深300股指期货推出对现货波动性的影响。结论显示,沪深300股指期货与现货之间有着很强的相关性,但不构成相互决定关系;沪深300股指期货的推出降低了现货的波动性;同时,该股指期货的推出使现货收益的非对称性显著增强。上述结论与目前已有的对仿真交易沪深300股指期货的研究结论存在着一些不一致。     

钢材期货价格发现功能研究——基于印度市场信息共享模型的分析

本文借助Johansen协整检验、Granger因果检验、信息共享模型、方差分解等方法进行多层次实证研究,定量地刻画出期货市场在价格发现中作用的大小。研究结果显示：印度板材期货价格和现货价格之间存在长期均衡关系,在价格引导上仅存在现货对期货价格的单向引导关系,期货对现货没有引导关系;通过方差分解发现,现货市场在价格发现功能中处于主导地位,说明印度钢材期货市场效率有待提高,板材期货没有实现其应有的价格发现功能。     

我国沪深300股指期货价格发现功能的实证分析

我国股指期货的推出对证券市场产生了巨大的影响,改变了股票市场缺乏规避系统性风险工具的现状,给金融市场带来新的生机与活力。本文采用协整检验、误差修正模型、方差分解和脉冲响应函数实证分析了我国股票市场和期货市场的价格发现功能。研究发现股指期货在价格发现上占主导地位,表明我国股指期货的推出,增强了市场效率,使市场信息能够更快捷的传达。     

沪深300股指期货在现货交易和非交易时段交易特征的比较研究

我国沪深300股指期货交易2010年4月16日正式推出,但沪深300股指期货市场与沪深300现货市场的交易时间存在显著的差异,即相对于股票现货市场,沪深300股指期货市场提前15分钟开盘,延迟15分钟收盘。运用日内分笔数据和分钟数据,对沪深300股指期货不同交易时段的交易特征进行比较。研究表明,不同交易时段知情交易者市场参与度存在明显差异,提前交易时段知情交易的概率最高,现货交易时段次之,延迟交易时段最低;沪深300股指期货在开盘时段的交易提供了较大的价格发现,特别是开盘的第一笔交易包含有大量的私有信息,价格贡献最大;提前交易时段私有信息的价格发现贡献度最高;尽管提前交易时段的交易提供了较大的价格发现,但定价效率较低。     

沪深300指数期货与股指现货价格关联波动的统计特性

对沪深300指数期货与股指现货价格关联波动的统计分析表明,沪深300股指期货市场较好地发挥了套期保值和价格发现功能,按成交量加权设计的指数化套期保值策略是有效的;股指期货价格对利好消息的反应比对利空消息的反应更剧烈,股指现货价格则对利空消息的反应比利好消息的反应更剧烈,说明涨市应更重视股指期货市场的表现,跌市应更重视股指现货市场的表现。股指期货与股指现货之间差价的变化对期货和现货价格并不具备统计意义上的预测能力,那种认为期现基差变化可以预测股市涨跌的"经验"认识是不可靠的。     

基于Morlet小波时频互相关的股指期货价格发现效率研究

本文采用Morlet小波时频互相关分析方法,从"时域"和"频域"两个维度检验了我国以及国际主要市场股指期货和现货价格序列的动态关联性,研究了股指期货价格发现效率的问题。研究表明,沪深300指数和股指期货在低频长周期范围内,呈现长时间高度相关、协同波动的特征;在高频短周期范围内,两者整体仍然具有协同波动特征,但时常出现短暂紊乱的情况,即期货与现货的交错引导现象。我国股指期货市场的价格发现效率较美国、英国成熟市场仍有较大差距,但强于日本。     

股指期货与现货价格引导关系研究——基于中国市场的实证分析

本文基于沪深300股指期货IF1108的1分钟高频交易数据,对中国股指期货与现货间价格引导关系进行了实证研究。结果发现:股指期货在价格发现中起主导作用;股指期货价格领先于现货股指2-30分钟,现货股指领先于股指期货价格的时长不超过13分钟;股指期货价格与现货股指间存在长期均衡关系。     

Modelling the iron ore price index: A new perspective from a hybrid data reconstructed EEMD-GORU model

As iron ore is the fundamental steel production resource, predicting its price is strategically important for risk management at related enterprises and projects. Based on a signal decomposition technology and an artificial neural network, this paper proposes a hybrid EEMD-GORU model and a novel data reconstruction method to explore the price risk and fluctuation correlations between China’s iron ore futures and spot markets, and to forecast the price index series of China’s and international iron ore spot markets from the futures market. The analysis found that the iron ore futures market in China better reflected the price fluctuations and risk factors in the imported and international iron ore spot markets. However, the forward price in China’s iron ore futures market was unable to adequately reflect the changes in the domestic iron ore market, and was therefore unable to fully disseminate domestic iron ore market information. The proposed model was found to provide better market risk perceptions and predictions through its combinations of the different volatility information in futures and spot markets. The results are valuable references for the early-warning and management of the related enterprise project risks.     

Extreme risk transmission channels between the stock index futures and spot markets: Evidence from China

We develop a skewness-dependent multivariate conditional autoregressive value at risk model (SDMV-CAViaR) to detect the extreme risk transmission channels between the Chinese stock index futures and spot markets. The proposed SDMV-CAViaR model improves the forecast performance of extreme risk by introducing the high-frequency realized skewness. Specifically, the realized skewness has a significant impact on the spillovers, but the realized volatility and realized kurtosis do not, which implies that the jump component plays an important role in extreme risk spillovers. The empirical results indicate there are bidirectional extreme risk spillovers between the stock index futures and spot markets, the decline of one market has direct and indirect channels to exacerbate the extreme risk of the other market. Firstly, the market decline will directly increase the extreme risk of related markets by decreasing market returns. Besides, the decline will indirectly increase the extreme risk by increasing the negative realized skewness and extreme risk spillovers.     

股指期货交易量与股指现货波动关系研究——来自香港恒生指数的实证

文章以香港恒生股票指数及其期货为样本,研究了股指波动性与指数期货交易量之间的关系。研究结果表明,它们之间存在单向因果关系,股指现货市场的日间价格波动并没有明显增加股指期货的交易,但股指期货的交易量却对指数现货的波动性产生延迟影响,这从一定程度上反映了香港市场股指期货主要被投资者用于套利而不是风险对冲的工具。     

上海黄金期货市场有效性的实证分析

黄金因为其兼有货币、商品和金融三大属性的特征历来受到人们的重视。今年年初黄金期货在上海期货交易所的上市,填补了我国长期缺乏金融期货的空白。同时管理层与市场各参与主体对黄金期货给予很高的期望与关注,因此研究上海黄金期货市场的有效性具有重要意义。通过运用ADF单位根检验、协整检验、误差修正模型以及格兰杰因果检验等时间序列与计量经济方法,对上海期货交易所黄金期货市场的有效性进行实证分析。结果表明,上海黄金期货市场尚未达到有效,并且黄金现货价格单向引导期货价格。     

The effect of short-sale restrictions on the information transmission of extended index futures trading

During the global financial crisis, two types of short-sale restrictions, i.e., the uptick restriction and the naked short-sale ban, were introduced in the Taiwan Stock Exchange (TWSE). This provides an opportunity to examine whether these two types of short-sale restrictions reduce the speed at which the overnight spot returns and the trading period spot returns adjust to the bad news revealed through the index futures returns during the post-close and pre-open extensions. The results of the threshold GARCH(1,1) model show that only the short-sale ban significantly reduced the speed at which the overnight spot returns react to the bad news revealed by the futures returns of the TWSE index during the pre-open extended session     

基于风险事件的期货市场环境分析及对策

本文通过分析近年来期货市场发生的风险事件,研究得出期货市场环境的不完善,即期货交易法律法规建设滞后、公共信息缺乏以及现货市场化水平低下等,是一系列风险事件发生的诱因。文章认为,完善市场环境是发展我国期货市场的必然要求,也是期货市场功能有效发挥的有力保证。     

Testing the stabilization hypothesis in the UK short-term interest rates: Evidence from a GARCH-X model

The objective of this paper is to examine the validity of one of the recurring arguments made against futures markets that they give rise to price instability. The paper concentrates on the impact of futures trading on the spot market volatility of short-term interest rates. The analytical framework employed is based on a new statistical approach aiming to reconcile the traditional models of short-term interest rates and the conditional volatility processes. More specifically, this class of models aims to capture the dynamics of short-term interest rate volatility by allowing volatility to depend on both scale effects and information shocks. Using a GARCH-X and asymmetric GARCH-X model four main conclusions emerge from the present study. First, the empirical results suggest that there is an indisputable change in the nature of volatility with evidence of mean reversion after the onset of futures trading. Second, the information flow into the market has improved as a result of futures trading. Third, a stabilization effect has been detected running from the futures market to the cash market by lowering volatility levels and decreasing the risk in the spot market. Finally, trying to capture the leverage effect the findings suggest that positive shocks have a greater impact on volatility than negative shocks.