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用多元BEKK-GARCH模型检验了股票市场与外汇市场收益率的波动溢出效应,结合LR似然比检验和Wald检验,实证研究股票市场和外汇市场收益率的波动关系。研究表明:股票市场与外汇市场收益率序列都存在ARCH效应和GARCH效应,即都具有时变方差特征;且两市的波动具有较高的持续性。股票市场和外汇市场收益率存在单向的,不对称的溢出效应,即汇市对股市有波动溢出效应,反之则不然。 相似文献
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石油价格与股票市场的溢出效应——基于中美数据的比较分析 总被引:15,自引:2,他引:13
本文以中美股票市场和国际原油市场的数据为样本,用VAR模型和二元GARCH模型研究了中美股市价格和国际石油价格的收益率及波动的溢出效应。研究结果表明,中国股市价格和国际石油价格之间,既不存在任何方向的收益率溢出效应,也不存在任何方向的波动溢出效应;而国际石油价格的变化率对于美国股市收益率确有负向先导作用,并且两者之间具有双向的波动溢出。 相似文献
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本文通过建立ARCH族模型对债券市场和股票市场的收益率波动进行了处理,并用条件方差进行了Granger因果关系检验,用来衡量波动的溢出效应,最后我们发现以上证指数和企债指数衡量的收益率波动之间存在双向的因果关系,即存在着波动溢出效应. 相似文献
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随着中国金融市场不断开放,中美国债市场之间的联动性进一步提高,信息溢出也进一步加强.本文构建动态信息溢出指数,分析了中美国债市场的总溢出、方向溢出及净溢出效应.研究发现:在样本期内,中美两国国债市场之间波动率总溢出效应强于收益率总溢出,两个市场存在不对称的双向溢出效应,其收益率和波动率溢出在动态路径上也存在显著差异,具有显著的时变性.2019年之前两国收益率总溢出水平基本维持在10以内,2019年后收益率溢出指数明显提高;波动率总溢出受金融事件影响导致极端值较多,溢出水平也相对较高.总体而言,无论是收益率溢出还是波动率溢出,多数时期美国国债市场对中国国债市场表现为正向净溢出,中国国债市场更多地受到美国国债市场的影响. 相似文献
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权证是一种有价证券,投资者付出权利金购买后,有权力(而非义务)在某一特定期间(或特定时点)按约定价格向发行人购买或者出售标的证券。其中有发行公司以其公司股票为标的所发行的股本权证,也有权证标的公司以外的第三人所发行的备兑权证。作为一种金融衍生产品,其发行需以相应的标的证券(资产)为基础,而衍生品与标的证券(资产)两者间的关系研究, 相似文献
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权证上市对标的股票的影响——基于中国股市的分析与实证 总被引:5,自引:0,他引:5
本文基于连续时间动态资产定价模型,推导出权证作为一种新的、依赖于标的股票的风险资产上市交易后,标的股票均衡价格变动的一般性结果,揭示出标的股票资产定价机制必然发生根本性改变;通过建立标的股票收益率与波动率的计量模型验证理论结果;实证考察,在中国,权证上市交易后对标的股票收益率及其波动性的影响,最后得出关于标的股票收益率各方面特征变化的完整结论,作为监管部门与投资者决策的参考依据。 相似文献
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沪深投资基金市场由于受市场结构、地理区位、经济文化等因素的影响,两市之间逐渐整合,在收益率和波动性上都存在相关性。本文利用ARCH类模型及Granger因果检验对沪深基金指数进行了实证研究,结果表明:沪深基金市场收益率存在显著相关关系,上海基金市场对于深圳基金市场具有一期前导作用,两市波动的溢出效应也是非对称的,仅存在上海对深圳的溢出效应。 相似文献
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本文从静态和动态两个方面测度了经济政策不确定性与金融市场收益率、波动率间的信息溢出效应,分析了股票市场、外汇市场、债券市场、黄金市场和货币市场五个金融子市场的信息溢出贡献度及其动态特征。研究发现,经济政策不确定性与金融市场间存在显著信息溢出效应,并呈现出时变性和双向性特征。样本期内,存在金融市场收益率对经济政策不确定的正向净溢出,金融市场波动率对经济政策不确定则表现为负向净溢出。从数值上看,政策不确定性与金融市场波动率间信息溢出强于与金融市场收益率间信息溢出。各个金融子市场在方向性溢出效应中贡献率结果显示,不同时期不同金融市场与经济政策不确定性间溢出效应存在差异。 相似文献
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Saurabh Ghosh 《Macroeconomics and Finance in Emerging Market Economies》2014,7(1):175-194
We find evidence of significant volatility co-movements and/or spillover from different financial markets to the forex market in India. Among a large number of variables examined, volatility spillovers from domestic stock, government securities, overnight index swap, Ted spread and international crude oil markets to the foreign exchange market are found to be significant. There is evidence of asymmetric reactions in the forex market volatility. Comparisons between pre-crisis and post-crisis volatility indicate that the reform measures and changes in financial markets microstructure during the crisis period had significant impact on volatility spillover. During the post-crisis period, the lagged volatility component that represents persistent or fundamental changes had significant spillover effect on forex volatility, rather than the temporary shocks component. There is evidence of a decline in the asymmetric response in the forex volatility during the post-crisis period in India. 相似文献
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Building on the increased interest in the volatility spillover effects between Chinese stock market and commodity markets, this paper investigates the dynamic volatility spillovers of Chinese stock market and Chinese commodity markets based on the volatility spillover index under the framework of TVP-VAR. The result shows that there is a highly dependent relationship between the stock market and commodity markets. On average, the Chinese stock market is the net recipient of spillover, non-ferrous metals and chemical industry have a very obvious spillover impact on the stock market. The degree of total volatility spillover is different in different periods. After major crisis events, the volatility correlation between markets increases. Since the outbreak of COVID-19, the spillover effect of the stock market on the commodity market has been significantly enhanced. Then optimal portfolio weights and hedge ratios are calculated for portfolio diversification and risk management. The result shows that the ability of most commodities to hedge against risks is significantly reduced when the crisis occurs; NMFI (precious metals) and CRFI (grain) still have good hedging ability after the crisis, but the effectiveness of hedging risk is relatively low. Besides, the combination of CRFI and SHCI (the Shanghai composite index) is the most effective for risk reduction. 相似文献
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Despite the well known importance of volatility–volume relationship, there is a paucity of research on this topic in emerging markets. We attempt to partially fill this gap by investigating volatility–volume relationship in the most important exchange market in the Middle East. We test the effect of trading volume on the persistence of the time-varying conditional volatility of returns in the Saudi stock market. Overall our results support the mixture of distribution hypothesis at the firm level. We also use two different proxies for information arrival, intra-day volatility, and overnight indicators. We find that these are good proxies for information and are important as contemporaneous volume in explaining conditional volatility. We also test for the volatility spillover direction between large- and small-cap portfolios. Our results show that the spillover effect is larger and statistically significant from large to small companies. 相似文献
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在大气污染日益严峻的情况下,新能源行业受政府大力支持和投资者青睐。新能源与原油一定程度上互为替代品,理论上国际原油价格必然对我国新能源行业股票价格有显著的波动溢出效应,但有些学者却持反对态度,认为我国股票市场对外还没有完全开放,新能源行业发展又很不成熟,所以该溢出效应很难显著。文章运用VAR- Asymmetric- BEKK模型进行比较研究得出:在未去除我国整体股市行情因素时,国际原油价格波动对我国新能源行业股票价格波动溢出效应不显著;而在去除我国整体股行情因素时,国际原油价格波动对我国新能源行业股票价格波动溢出效应在1%显著性水平下显著。表明存在从国际原油价格向我国新能源行业股票价格的波动溢出效应,只是该溢出效应被我国股市总体行情掩盖了。 相似文献
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This paper addresses the relationship between the capital structure and the systematic risk of common equity for a firm whose capital structure includes convertible securities. Adding warrants to the capital structure reduces the systematic risk of equity, which is consistent with the fact that warrants dampen the volatility of equity by reducing the upside potential gains of existing stockholders. Expressions showing the impact of conversion features in debt and preferred stock on the systematic risk of equity are derived, and contrasted with the systematic risk effects of non-convertible debt or non-convertible preferred stock financing. Failure to incorporate conversion features may lead to serious errors in assessing the impact of financing alternatives on the risk of equity. 相似文献
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中国债券市场与股票市场间波动溢出效应——基于SJC-Copula模型的分析 总被引:1,自引:0,他引:1
本文基于SJC-Copula模型分析债券市场和股票市场间的波动溢出效应,并以此进一步分析波动溢出效应对债券市场风险规避能力的影响。研究选取2003年3月31日至2009年8月31日中信标普国债指数日数据和上证指数日数据,验证了两市波动溢出效应的存在性,同时发现波动溢出效应显著增强了债券市场规避风险的能力。 相似文献
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基于具有外生变量的二元VAR-MGARCH模型对中国货币市场利率和股价之间的关联进行了理论分析和实证研究。结果表明,利率和股价之间基本不存在价格溢出效应;货币市场利率和股价序列均表现出时变方差的特征和波动的持久性特征,货币市场和股市之间存在双向波动溢出效应;货币供给的正向冲击对利率的影响是正向的。 相似文献
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对于动态投资组合与风险管理来说,测定波动溢出效应是非常重要的。已有的研究是建立在不同金融市场之间的波动是线性相关的,而线性相关并不能描述金融市场之间的非线性关系。借用Copula技术来描述股票市场之间的非线性关系、SV模型来刻画股票市场数据的边缘分布,并引入波动变结构论分析判断波动溢出,实证分析验证了方法是可行的。 相似文献