中国股市与世界其他股市之间的大风险溢出效应

该文分析了中国证券市场A股、B股和H股之间,中国股市与世界其他股票市场之间的极端风险的溢出效应.实证结果表明:A股与B股之间存在着强烈的风险溢出效应,B股大幅下跌的信息可用来预测未来A股大幅下跌的可能性;A股和H股之间,尤其是B股和H股之间也存在着强烈的风险溢出效应;B股,尤其是H股,与世界其他股市之间存在着显著的风险溢出效应;与此相反,A股虽然与韩国、新加坡股市之间存在着一定的风险溢出效应,但它与日本、美国和德国等世界主要股市之间不存在任何风险溢出效应.     

中国股市与世界其他股市之间的大风险溢出效应

本分析了中国证券市场A股、B股和H股之间，中国股市与世界其他股票市场之间的极端风险的溢出效应。实证结果表明：A股与B股之间存在着强烈的风险溢出效应，B股大幅下跌的信息可用来预测未来A股大幅下跌的可能性；A股和H股之间，尤其是B股和H股之间也存在着强烈的风险溢出效应；B股，尤其是H股，与世界其他股市之间存在着显的风险溢出效应；与此相反，A股虽然与韩国、新加坡股市之间存在着一定的风险溢出效应，但它与日本、美国和德国等世界主要股市之间不存在任何风险溢出效应。     

中国股市溢出效应

研究了中国A股市场、B股市场和H股市场的市场分隔和信息溢出效应。递归协整分析结果表明:3个股票市场中的任何一个都不与其他市场存在长期关系,且市场分隔并没有因政策变化而消失。溢出指数分析结果表明:在平均水平下,H股市场向A股市场和B股市场有净溢出,B股市场向A股市场有净溢出,这支持了境外投资者拥有更多信息的假说;动态分析结果表明,在经济平稳时期,A股市场拥有更多信息,金融危机期间出现B股市场和H股市场向A股市场的金融传染现象。     

基于VECM-BEKK-二元GARCH模型的沪市A、B股市场信息传导关系研究

通过VECM-BEKK-二元GARCH模型对沪市A、B股市场的信息传导关系进行实证研究发现,一方面,沪市A、B股市场在长期存在双向价格溢出效应,但短期仅有从A股市场到B股市场的单向价格溢出;另一方面,沪市A、B股市间存在波动溢出效应,但是非对称的,即仅有从A股市场向B股市场的波动溢出。由此证实了由A股市场向B股市场单向传导是沪市信息传导的主体路径。     

我国证券市场流动性溢出效应的实证研究

2008年金融危机中的一个重要金融现象是流动性溢出效应.本文以我国沪深两市交易的国债和股票为样本,利用VAR技术分析了股票市场与债券市场之间的流动性溢出效应问题.由于我国股票市场的规模远大于交易所交易债券,我们发现存在显著的股市流向债市的流动性溢出效应,而债市流向股市的流动性溢出效应统计上却不显著.同时我们发现各个市场自身的收益率和波动率对其流动性也有着显著的影响.最后我们还发现两市自身的流动性存在着很强的自相关性.证据表明当我国资本市场出现流动性不足时,尤其要加强对股票市场流动性风险的防范和监管.同时也反映出我国要大力发展债券市场的必要,使股市和债市的流动性相互影响相得益彰.     

美国货币政策对中国股票市场溢出效应的实证研究

本文认为:美国货币政策对我国股票市场真实回报具有显著的溢出效应,即扩张性的货币政策使我国股票市场真实回报下降;在短期,美国货币政策冲击对我国股票市场真实回报波动贡献大,而在中长期美国的通胀、产出冲击贡献大;美国货币政策溢出效应经由美国股票市场价格示范效应传递的机制不显著。     

国际原油价格波动对中国宏观经济影响的重新考察

本文对国际原油价格波动对中国宏观经济的影响进行了重新考察。研究发现:国际原油价格通过影响采购经理人指数进而影响中国主要宏观经济变量,采购经理人指数的引入,完善了国际原油价格波动对中国宏观经济影响的时序传导机制,从而提高了实证结果的显著性。实证结果显示:国际原油价格上涨对中国消费者价格指数有正向影响,但这一结果并不显著;同时国际原油价格上涨并未改变中国经济增长的总体态势。VEC实证模型的估计结果表明:国际原油价格与中国宏观经济变量之间存在显著的协整关系,而且国际原油价格波动对中国宏观经济的影响存在滞后效应。     

我国股市股指波动“杠杆效应”的实证分析

在股票市场中,我们经常可以看到这样的现象:预期的看空或利空消息出台等负面冲击要比预期看多或利好消息出台等正面冲击对大盘股指波动的影响更为剧烈,即股市下跌的反应要比股市上涨的反应更为迅速,表现出一种非对称效应,这种效应也被称为"杠杆效应"。     

核心资产尾部风险溢出效应研究

本文采用分位数回归技术构建时变条件预期损失模型(ΔCoES),测算2020年4月—2021年3月间我国A股核心资产股票价格的尾部风险溢出情况,分析我国A股核心资产下跌对于市场大盘的影响.实证研究表明:核心资产指数尾部风险越大,在极端情况下对上证综指的风险溢出也越大,两者有显著的正相关性.在2020年4月—2021年3月市场下跌期间,核心资产对市场的尾部风险溢出高于同期的中证500指数.核心资产中,医疗保健行业波动最大,产生的风险溢出也最高,其次是消费类行业,这两个行业在近一年内对市场造成的下跌影响最大.     

国际大宗商品价格走势分化对中国的影响

2012年8月16日,中国国际经济交流中心举办第38期"经济每月谈",主题为"大宗商品价格形势与影响"。国经中心经济研究部副部长、研究员张永军认为,国际农产品价格上涨对国内粮食价格有一定影响,但不足以改变国内食品价格上涨放缓的趋势,重要原材料国际市场价格下跌对国内的影响较为直接,年内国内消费价格上涨势头将继续减弱,工业品和生产资料价格下跌态势很难扭转。     

Oil shocks,policy uncertainty and stock returns in China

This paper examines the interdependence of China's policy uncertainty, the global oil market and stock market returns in China. A structural VAR model is estimated that shows that a positive shock to economic policy uncertainty in China has a delayed negative effect on global oil production, real oil prices and real stock market returns. Shocks to oil market‐specific demand significantly raise China's economic policy uncertainty and reduce the real stock market returns. As measured by a spillover index, the interdependence between these variables has been rising since 2003 as China's influence in the oil market has increased. An equivalent spillover index calculated for the US is smaller and has been largely flat over time.     

Dynamic relationships between crude oil prices and socially responsible investing in Brazil: evidence for linear and non-linear causality

Recent years have witnessed an increasing interest in socially responsible investing (SRI), reflecting investors’ growing awareness of social, environmental, ethical and corporate governance issues. At the same time, the effect of oil price shocks on stock price returns has become a prominent issue due to surges in energy prices. Using the Brazilian corporate sustainability index (ISE) as a benchmark for socially responsible investments in the Brazilian stock market, the present study extends the understandings on the impact of oil prices on stock price behaviour, focusing on a new class of assets: those from socially responsible firms. To this end, apart from conventional linear causality approaches, we apply a nonparametric test by Diks and Panchenko (DP) on daily data spanning from January 2008 to December 2015 to test for non-linear causality, before and after controlling for conditional heteroscedasticity. Our findings show that, in spite of their efforts to become more socially responsible, firms that have adhered to the ISE in recent years are influenced by crude oil spot prices, especially the WTI crude. In line with previous studies, we also provide consistent evidence that the Brazilian stock market, as a whole, is associated with the international crude oil market.     

Nonlinear effects of oil shocks on stock returns: a Markov-switching approach

Using Markov-switching models, we investigate whether oil price shocks have nonlinear effects on stock returns. Empirical evidence from a set of international stock indexes suggests that an increase in oil prices has a negative and significant impact on stock prices in one state of the economy, whereas this effect is significantly dampened in another state of the economy. Furthermore, it is shown that changes in oil prices or in oil price volatility do not lead to a higher probability of switching between regimes.     

The effect of oil prices on stock prices: fresh evidence from asymmetric causality tests

This article investigates the causal impact of oil prices on stock prices in each G7 market as well as in the world market. An asymmetric causality test developed by Hatemi-J is used for this purpose. Since the underlying data appears to be non-normal with time-varying volatility, we use bootstrap simulations with leverage adjustments in order to produce more reliable critical values than the asymptotic ones. Based on symmetric causality tests, we find no causal effect of oil prices on the stock prices of the world market or any of the G7 countries. However, when we apply an asymmetric causality test, we find that increasing oil prices cause stock prices to rise in the world, the U.S. and Japan while decreasing oil prices cause stock prices to fall in Germany. This may imply that the world, the U.S. and Japanese stock markets consider increases in oil prices as an indicator of good news as this may mean that there is an increase in oil demand due to an expected growth in the economy while the German stock market treats decreasing oil prices as a signal of an expected contraction in the economy.     

Oil price risk in the Spanish stock market: An industry perspective

This study examines the sensitivity of the Spanish stock market at the industry level to movements in oil prices over the period 1993–2010, paying special attention to the presence of endogenously determined structural changes in the relationship between oil price changes and industry equity returns. The empirical results show that the degree of oil price exposure of Spanish industries is rather limited, although significant differences are found across industries. The oil price sensitivity is very weak in the 1990s, a period of fairly stable and low oil prices. Instead, the link between crude oil and stock prices seems to have increased during the 2000s, becoming primarily positive. This evidence highlights the key role played by aggregate demand-side oil price shocks associated with the global real economic activity in the link between oil price fluctuations and the Spanish stock market.     

国际石油价格与通货膨胀的溢出效应及动态相关性

国际石油价格大幅波动不可避免地给全球经济带来了一定程度的冲击和影响。文章采用向量自回归、多元GARCH-BEKK和DCC-GARCH模型对中美两国通货膨胀与国际石油价格之间的均值溢出效应、波动溢出效应及动态相关关系进行了实证检验。检验结果表明,国际石油价格与中国通货膨胀不存在任何方向的均值和波动溢出效应,美国通货膨胀与国际油价则存在双向显著的均值和波动溢出效应;中国通货膨胀与国际油价的动态相关关系显著弱于美国,不易受到国际油价的冲击和影响。从整体上看,当前中国通货膨胀与国际石油价格的关联性并不显著,但随着我国石油消费对进口依赖程度的不断提高,石油安全问题在可预见的未来将成为中国需要应对的一个现实挑战。因此,相关部门应及早采取有效措施,应对未来石油冲击对宏观经济的影响。     

中国询价制度下询价对象的报价行为——基于IPO网下申购报价特征的实证分析

利用2010—2012年中国A股443家询价对象的45630组详细报价的微观数据,构建了"信息优势"询价对象与"信息劣势"询价对象的平均报价之差的代理变量,使用Ordered-probit模型,对中国询价制度下A股市场中是否存在"赢者诅咒"假说进行了检验。进而利用询价阶段的详细报价数据,构建了3个衡量机构投资者审慎报价的代理变量,实证检验了中国第三阶段新股发行制度改革对询价对象报价行为的影响。研究结果表明:"信息优势"投资者与"信息劣势"投资者的平均报价之差与IPO首日抑价率成正比;中国证监会于2012年5月实施新股发行制度改革,显著提高了询价对象报价的审慎程度;导致新股发行抑价率高的主要因素仍是二级市场炒作。     

Petroleum spreads and the term structure of futures prices

We employ the term structure of gasoline and heating oil prices, proxied by convenience yields, to explain the variation in the spread between the prices of gasoline and crude oil and the prices of heating oil and crude oil. We demonstrate that the marginal convenience yields in the gasoline and heating oil markets explained much of the variation in the spreads between 1986 and 1999. The evidence indicates the importance of a disaggregated treatment of the term structure of prices: the convenience yield is found to explain a substantially higher amount of the variation in the spread when it is decomposed by maturity, even after controls for seasonality and inventory levels are implemented. These findings support the notion that the futures term structure contains information beyond what can be garnered via obvious or easily available proxies of current supply and demand. The findings are also supported in an alternate specification that tests for the origins of information spillover (leadership) between the commodities: it is demonstrated that decomposed convenience yields explain a substantial portion of the volatility spillover from the gasoline and heating oil markets to the crude market.     

Oil and US stock market shocks: Implications for Canadian equities

Oil and US stock market shocks are relevant to Canadian equities because Canada is an oil exporter exposed to market developments in the wider continent. We evaluate how the relationship between Canadian stock market indices and such external shocks change under extraordinary events. To do this, we subject statistically identified oil and S&P 500 market shocks to a surprise filter, which detects shocks with the greatest magnitude occurring over a given lookback period, and an outlier filter, which detects extrema shocks that exceed a normal range. Then, we examine how the dependence structure between shocks and Canadian equities change under the extreme surprise and outlier episodes through various co-moment spillover tests. Our results show co-moments beyond correlation are important in reflecting the changes occurring in the relationships between external shocks and Canadian equities in extreme events. Additionally, the differences in findings under extreme positive and negative shocks provide evidence for asymmetric spillover effects from the oil and US stock markets to Canadian equities. Moreover, the observed heterogeneity in the relationships between disaggregated Canadian equities and shocks in the crude oil and S&P 500 markets are useful to policy-makers for revealing sector-specific vulnerabilities and provide portfolio diversification opportunities for investors to exploit.     

市场分割下中国股市反馈交易实证研究——来自A股、B股和H股市场的经验证据

文章在行为资本资产定价模型(BCAPM)的基础上,通过借鉴Watanabe(2002)的方法,建立了GJR-GARCHM(1,1)-M模型,充分考虑中国股票市场处于分割状态的现状,使用基本覆盖A股、B股和H股市场全部交易历史的市场指数日收盘价数据,对A股、B股和H股市场的反馈交易行为进行研究和比较,结果显示:A股和B股市场都存在显著的正反馈交易效应,反馈交易行为主要取决于波动率水平和市场涨跌两个因素;与成熟股票市场类似,H股和红筹股市场的正反馈交易行为不显著;A股市场的反馈交易行为受市场涨跌因素影响更大,而B股市场的反馈交易行为主要由波动率水平决定;深市比沪市更容易出现正反馈交易者主导市场的现象。文章的研究不仅对行为资本资产定价理论的成立提供了经验性证据,而且对投资经理的实践操作和政策制定者的监管调控都具有一定的参考价值。