大陆与台湾股指期货价格发现功能比较研究

本文利用日内15分钟交易数据,对大陆与台湾股指期货的价格发现功能进行了比较,发现沪深300股指期货和现货间存在双向价格引导关系,但在信息传导效率上,期货领先现货,对台湾市场而言,仅存在期货对现货的单向引导关系;期货市场在长期价格发现功能中占主导地位,但台指期货的主导作用要强于沪深300股指期货。文章从投资者结构、合约设计、交易制度等影响因素分析了两岸股指期货价格发现功能的差异,并提出改善大陆股指期货价格发现功能的建议。     

股指期货与现货市场价格的互动、引导关系研究——基于沪深300股指期货的实证分析

股指期货功能的发挥建立在股指期货与现货市场价格形成有效互动、引导关系的基础之上。本文通过相关性检验和基差序列单位根检验得出沪深300股指期货与现货市场实现了有效互动;通过Granger因果关系检验、协整检验、向量误差修正模型和方差分解结果发现,前一期现货价格引导期货价格,而股指期货价格在价格发现中贡献度较低,在偏离均衡的动态调整过程中对现货价格的引导作用不明显,其价格发现功能未得到充分发挥。最后,根据所得结论给出提高我国股指期货市场信息效率的建议。     

股指期货、股市波动性与价格引导——基于沪深300数据的研究

2010年4月16日,股指期货在国内正式上市交易，至今为止,我国股指期货上市已有三年的时间，股指期货对股票市场波动性的影响如何,股指期货与现货的价格引导作用怎样？本文借助TARCH模型以及VAR脉冲响应模型,探究了沪深300股指期货对股市波动性的影响,并且对于股指期货与现货互相之间的价格引导作用进行了研究分析，结果表明：股指期货的上市减弱了股市对于信息的非对称反应程度;股指期货价格的波动对于现货价格的影响大于现货价格波动对于股指期货价格的影响。     

股指期货与股票市场定价效率问题

股指期货的推出,大大提高了股票市场的定价效率.在无套利均衡市场上,股指期货价格由相关股票组合的价格及持有成本决定,股票现货价格成为影响股指期货价格的主要因素.但在动态非均衡市场上,股指期货的价格形成集中并传递大量信息,这些信息通过股指期货市场与股票市场间的套利机制及时传递到股票市场,增加相关股票组合价格的信息含量,引导和发现现货价格,从而提高股市的定价效率.     

沪深300指数期货市场与股票市场信息传递性研究

笔者采用OHLC方法度量沪深300股指期现货市场的波动率,利用误差修正模型、Granger因果检验和脉冲响应等方法,从价格发现和波动率传导两个角度入手,较为系统地分析了沪深300指数期现货市场上市两年来的信息传递关系。研究结果表明:沪深300指数期货价格和现货价格之间存在双向引导关系,股指期货市场价格发现能力初步显现。现货市场波动对股指期货市场波动产生一定影响,但股指期货市场对现货市场波动起引导作用,其冲击的强度更大。     

沪深300指数与股指期货价格变化关系的检验

在沪深300股指期货推出两年以后,为了验证期货市场的价格发现功能,本文利用VAR模型对沪深300股指期货和现货价格的每分钟收益率序列实际数据进行检验.实证检验结果显示期货价格变化对未来现货价格变化有显著影响,持续时间可达5分钟以上,而现货价格对期货价格变化没有显著影响.因此,沪深300指数期货市场已经发挥了较强的价格发现功能.同时,我们发现对股指期货和现货市场而言,VAR模型具有较强的稳定性,在利用历史数据预测未来指数价格变化中有较强的实用价值.     

我国股指期货市场价格发现功能和波动溢出效应研究——基于VECM-DCC-MVGARCH模型

本文对我国股指期货市场的价格发现功能进行了实证研究。首先用Granger因果检验分析了两个市场的因果关系。其次分析了股指期货市场和现货市场之间的领先-滞后关系、波动率传导和条件相关关系。最后通过脉冲响应函数分析了两个市场对信息反应的速度。实证结果表明期货和现货市场互为Granger因果关系,但期货价格发现功能要强于现货市场,期货市场对信息反应速度比现货市场要快,并且从期货市场到现货市场存在显著的波动溢出。     

沪深300股指期货价格发现功能的实证研究

本文利用协整检验、向量误差修正模型以及脉冲响应和方差分解方法,对沪深300股指期货对现货市场的价格发现功能进行了实证研究.结果表明,现货价格在长期内引导沪深300股指期货价格,沪深300股指期货市场在短期和长期内对现货市场的价格发现功能都大于现货市场的价格发现功能,但是这种作用并不是很明显(期货市场对期货市场和现货市场价格的形成大约贡献65％～70％).     

A50股指期货与中国内地股市价格发现实证研究

股指期货异地上市不仅会对本土股票市场和衍生品市场产生多方面的影响，而且涉及到本土市场金融定价权等一系列问题。理论上期货价格与现货价格应存在长期关系，并且期货价格具有价格发现功能，先导于现货价格。通过实证研究发现，我国大陆股票市场先导于A50股指期货市场，虽然期货价格和现货价格存在显著的长期均衡关系，但A50股指期货价格发现功能并不显著；其作为一种金融投资产品，没有股指期货的功能，但它对大陆股市的影响仍需引起重视。     

沪深300指数期货对A股市场波动性影响的传导机制分析

利用同一样本空间下的多元波动率模型进行实证检验的结果显示,股指期货的推出加剧了现货市场的波动,其中原因不仅源自现货市场的基本面因素,还源自股指期货的高波动性明显冲击了现货市场,从而加剧了现货市场的波动性.而这其中的传导机理在于:在当前我国股指期货市场个人投资者占绝对比例的现实格局下,股指期货市场存在的正反馈交易效应、价格引导机制以及期现套利对冲不充分等三方面因素的叠加,最终将影响现货市场的波动,进而冲击现货市场的稳定运行.     

限制交易政策如何影响期现关系？——对股指期货价格发现功能的实证检验

本文利用2015年中国股市大幅下跌期间,对股指期货严格限制交易政策这一独特事件前后的高频数据,研究限制交易政策对股指期货与股票市场价格引导关系的影响。利用I-S模型和分位数回归方法的实证结果表明:限制交易政策实施前,股指期货对股票市场的价格影响更强,尤其表现在价格急剧下跌时期;限制交易政策显著增加了期货市场交易成本,从而降低了期货市场的信息份额,削弱了其对股票市场的价格影响,并且改变了期货价格对现货价格“助跌强于助涨”的影响模式,增强了股指期货在价格上涨时对股票市场的影响。研究结果一方面直接量化了期货交易成本变动对其价格发现功能的负面影响,另一方面也从价格引导关系的视角提供了股市危机时期股指期货限制交易政策监管效果的实证证据。     

引入国债期货合约能否发挥现货市场稳定效应？——基于中国金融周期的研究视角

我国国债期货市场能否发挥稳定现货市场功能,金融周期风险是否会改变国债期货市场对现货市场波动的影响,是投资者实施风险管理和监管部门构建市场稳定机制的重要依据。本文通过信息传递机制和交易者行为两个维度探析国债期货市场发挥稳定功能的微观机理,分析金融周期风险对衍生工具稳定功能的影响,解析引入国债期货合约能否缓解金融周期波动对国债市场冲击,同时关注我国国债期货交易机制改进与现券波动关系。研究发现:(1)我国国债期货市场已实现抑制现货市场波动的功能,金融周期风险会引发现货价格波动,国债期货市场能够降低金融周期的波动冲击;(2)改善现货市场深度和套保交易是国债期货市场发挥稳定功能的微观路径,国债期货市场增进国债预期交易量流动性、减弱非预期交易量干扰,金融周期低波动区间套保交易稳定作用受到抑制;(3)国债期货投机交易和波动溢出效应助长现货市场波动,正负期现基差对国债波动影响具有非对称特征。     

我国股指期货与现货市场信息传递与波动溢出关系研究

股指期货与现货市场关系是监管者关注的重点问题。本文采用我国股指期货上市以来1分钟级高频数据,应用向量误差修正模型、方差分解、多元T-GARCH等,考察期现两市信息传递、波动溢出效应的影响。实证结果表明,尽管股指期货和股票市场之间短期内存在相互引导关系,但股票市场价格变动更多来自于自身影响,起主导作用,而且两市长期均衡收敛也是以股票市场占主导地位;两市存在显著的双向波动溢出,期货市场的波动溢出效应强于股票市场的波动溢出效应;两市场存在明显的非对称效应,期货市场对坏消息更为敏感,而现货市场对好消息更为敏感。     

Price discovery and volatility spillovers in index futures markets: Some evidence from Mexico

This paper investigates the hypotheses that the recently established Mexican stock index futures market effectively serves the price discovery function, and that the introduction of futures trading has provoked volatility in the underlying spot market. We test both hypotheses simultaneously with daily data from Mexico in the context of a modified EGARCH model that also incorporates possible cointegration between the futures and spot markets. The evidence supports both hypotheses, suggesting that the futures market in Mexico is a useful price discovery vehicle, although futures trading has also been a source of instability for the spot market. Several managerial implications are derived and discussed.     

The Impact of Single Stock Futures on Market Efficiency and Volatility: A Dynamic CAPM Approach

The concerns regarding regulations of futures markets and their destabilizing ability are unresolved in both developed and developing markets. Following stringent regulations of single stock futures (SSFs) for resumption episode after financial crises, this study addresses this concern and investigates the destabilizing impact of SSFs on the underlying stocks in an emerging economy using data of companies listed in the Karachi Stock Exchange between 1999 and 2008. Specifically, the study explores whether SSFs have caused a simultaneous increase in the volatility and operational efficiency of their underlying spot market counterparts. The results reported in the study show that the introduction of SSFs has no significant impact on market efficiency and volatility of SSFs underlying stocks and non-SSFs stocks. The results affirm that SSFs have, at least, no destabilizing impact on the underlying stocks.     

基于高频数据的股指期货与现货市场波动溢出和信息传导研究

本文利用沪深300指数和当月股指期货连续合约的高频数据,采用非参数方法估计日度股票指数和股指期货的整体波动、连续性波动和跳跃,发现两个市场波动成分存在双向的格兰杰因果关系,但是期货市场的跳跃并不会影响后续股票市场的跳跃。此外,已实现相关系数在股指期货上市初期表现出了较大的变动,整体表现出了较强的联动趋势。最后,日内高频价格之间存在稳定的协整关系,两个市场存在双向的信息传导,股指期货的价格发现功能得到发挥。     

Transmission of Stock Returns and Volatility between the U.S. and Japan: Evidence from the Stock Index Futures Markets

In this paper, we examine the nature of transmission of stock returns and volatility between the U.S. and Japanese stock markets using futures prices on the S&P 500 and Nikkei 225 stock indexes. We use stock index futures prices to mitigate the stale quote problem found in the spot index prices and to obtain more robust results. By employing a two-step GARCH approach, we find that there are unidirectional contemporaneous return and volatility spillovers from the U.S. to Japan. Furthermore, the U.S.'s influence on Japan in returns is approximately four times as large as the other way around. Finally, our results show no significant lagged spillover effects in both returns and volatility from the Osaka market to the Chicago market, while a significant lagged volatility spillover is observed from the U.S. to Japan. This revised version was published online in August 2006 with corrections to the Cover Date.     

A Likelihood Ratio Test of Price Volatilities: Comparing Stock Index Spot and Futures

This paper uses three methods to estimate the price volatility of two stock market indexes and their corresponding futures contracts. The classic variance measure of volatility is supplemented with two newer measures, derived from the Garman-Klass and Ball-Torous estimators. A likelihood ratio test is used to compare the classic variance measure of price volatilities of two stock market indexes and their corresponding futures contracts during the bull market of the 1980s. The stock market volatilities of the Standard & Poor's 500 (S&P 500) and New York Stock Exchange (NYSE) indexes were found to be significantly lower than their respective futures price volatilities. Since information may flow faster in the futures markets than in the corresponding stock market, our results support Ross's information-volatility hypothesis. It was also noted that the NYSE spot volatility was lower than the S&P 500 spot volatility. If the rate of information flow and firm size are positively related, then the lower NYSE spot volatility is explained by the size effect. The futures price volatilities for the two indexes were insignificantly different from each other. With stock index spot-futures price correlations approaching unity, one implication of our results for index futures activity is that smaller positions in futures contracts may suffice to achieve hedging or arbitrage goals.     

股指期货推出对中国股票市场波动性的影响研究——基于沪深300股指期货高频数据的实证分析

本文利用沪深300股指期货的高频数据,研究了股指期货推出对中国股票市场波动性的影响。结果表明:在股指期货合约交割日,总体上不存在到期日效应;在中长期,股指期货推出则确实增加了现货市场的波动,但随着时间的推移,这种影响在减小。另外,股指期货对现货市场波动起到引导作用,其冲击持续的时间更长、强度更大。本文政策含义在于,随着时间的推移,股指期货开始平稳有效运行,对现货市场起到重要引导和价格发现的作用,但由于股指期货的高投机性,加强对其监管仍然十分必要。     

Informed Futures Trading and Price Discovery: Evidence from Taiwan Futures and Stock Markets

This article focuses on the information effects between the futures market and its spot market. Intraday data are used to investigate the lead-lag relationships between the returns and trading activity of Taiwan stock index futures and the spot returns. We focus on the transmission direction and the sources of information. Consistent with most previous studies, our results show that other than the contemporaneous relationship predicted by carry-cost theory and efficient market theory, futures returns significantly lead spot returns, which implies that informed trades may occur in the futures market. Using private transaction information, net open buy, as a proxy for futures trading activity and distinguishing different types of futures traders, we find that foreign institutional traders are the major source of informed trades because their trading has predictive power for future movements in both spot and futures prices. Traders in other categories are information laggards.