中国沪深股市收益率和波动性的实证分析

沪市和深市股票收益率和波动性之间具有相互作用和相互影响，存在股价变化和走势之间的互动作用和示范效应，我们发现两市收益率序列之间具有长期协整关系，这说明它们存在类似的长期趋势成分；它们的短期误差修正系数存在一定的差异，这说明它们具有相异的短期波动模式；我们利用GARCH模型等非对称性方法发现两市之间存在显的波动“溢出效应”和“杠杆效应”，这说明两市资金的流动性约束较低，投资主体的相关性较强，两市收益率和波动性之间具有一定程度的整合性。     

期货价格收益率与波动性的实证研究——以中国上海与英国伦敦为例

采用协整模型、Granger因果关系检验、ECM模型及几种GARCH模型对中国上海与英国伦敦金属期货价格收益率和波动性做了研究.发现两市期货价格之间存在Granger因果关系、协整关系、同向变动关系和长期的共同趋势.采用ECM模型研究了两市的短期波动差异.GARCH类模型研究发现,两市波动性存在非对称性、溢出效应、杠杆效应.上海对伦敦市场的单向溢出效应显著存在.两市存在的利空消息均大于利多消息的作用,伦敦期货市场风险大于上海期货市场风险.     

可转债市场与标的正股市场:溢出效应分析

文章选用中证可转换债券指数来反映可转债市场的变动,自编股票指数来反映标的正股市场的变化。通过构建向量自回归模型、二元VAR-DCC-GARCH模型和二元VAR-BEKK-GARCH模型来研究两市的溢出效应。结果发现,两市存在双向的收益率均值溢出效应,可转债市场的均值信息传递占主导地位,具有较强的价格发现功能;可转债市场和标的正股市场存在时变的动态相关系数,相关程度在2017年之后出现了明显的上升,且趋向稳定,说明两市分割程度减小;两市存在双向的收益率波动溢出效应,但是标的正股市场对可转债市场的波动溢出效应更强。     

资产收益率与通货膨胀率关联性的实证分析

通过研究股票实际收益率与通货膨胀波动性之间的关系,可以判断股票市场波动和宏观经济运行之间的联系.我们检验发现,通货膨胀率的波动能够影响股票实际收益率的变化,这说明价格水平变化不仅影响消费品之间的替代,也影响投资品之间的替代.因此,通过积极货币政策缓解通货紧缩压力,可以增强股票市场的规模活性并形成收益率上升的稳定预期.     

短期国际资本对股票市场间波动传递效应的实证分析——以中美股票市场为例

本文关于短期国际资本对股票市场间波动的传递效应进行研究,首先运用GARCH模型,研究了美国的股票市场与中国股票市场的波动规律,并量化生成了中美股票市场的波动序列;其次运用Granger因果检验考察短期国际资本能否作为一种渠道,将美国股票市场的波动性影响传递到中国股票市场;最后选取短期国际资本流动性指标、资本和金融账户差额与外汇储备占比指标、中美股市收益率差指标等来构建中国股票市场价格指数的TARCH模型,发现中国股票市场存在明显的非对称效应,且短期国际资本流动对我国股市具有明显的传递效应。     

股指期货与现货市场溢出效应及动态关系研究——基于中、美、日、香港等市场的实证分析

本文运用BEKK-MGARCH-VAR和DCC-MGARCH模型分别实证分析了中国、美国、日本及香港等地股指期货与现货市场收益率均值和波动的溢出效应以及两市相关系数的动态(时变)特征,研究发现:四个国家(地区)股指期货与现货市场收益率间均存在双向均值溢出效应;四个国家(地区)股指期货与现货市场间均存在双向波动溢出效应;新兴经济体的指数期货与现货市场间的动态相关系数波动较小,而发达国家指数期货与现货市场间的动态相关系数波动较为明显。最后,对当前中国政策当局规范股指期货市场,警惕期现两市之间的波动传导效应,以确保股指期货和现货两市的稳定提出政策建议。     

国内外原油市场收益率及其波动性的双长记忆性测度

本文基于我国原油现货价格和欧洲Brent原油现货价格的数据,运用多种计量模型对原油市场收益率及其波动性的长记忆性进行测度。研究发现,我国原油市场收益率序列不存在长相依性特征,波动率序列则存在长记忆性效应;国外原油市场收益率及波动率序列均存在显著且较强的长记忆性。同时,检验结果表明,采用Student-t分布来刻画"尖峰厚尾"分布性质并利用TGARCH模型来描述"杠杆效应"是非常必要的。     

沪深股市收益和风险分析

通过采用ECM模型及GARCH模型对沪深股市进行了研究,结果发现两市波动性存在非对称性和杠杆效应,沪深两市对的利空消息反应均大于利好消息的反应,但是深市风险大于沪市风险,当然其收益率也比较高。     

我国股市与汇市波动溢出动态性实证研究

文中运用二元收益率BEKK—GARCH（1,1）模型,研究了我国在汇改后股市与汇市间的波动溢出。实证结果表明在两市间存在一个双向的波动传递关系,即股市与汇市均对它们相互之间市场“新息”产生反应。股市收益率对于它自身的波动不存在“新息”效应,而汇率自身过去的波动对当前收益率存在“新息”效应。汇市（股市）波动对股市（汇市）的冲击不存在持续性,即过去的波动对于预测未来的波动影响不大。     

运用ARCH类模型研究上证基金市场的波动性

2006年基金业表现辉煌,但基金市场的收益率也呈现出一定的波动性.选取上证基金指数为研究对象,运用ARCH模型族对指数收益率的波动性进行实证分析,并对波动性进行了预测,结果表明,GARCH(1,1)模型对上证基金指数的波动具有很好的拟和效果;指数收益率表现出非正态性和波动的集聚性的特征;在未来一段时期内,基金收益率的波动性会减小.     

DYNAMIC STOCK RETURN–VOLUME RELATION: EVIDENCE FROM EMERGING ASIAN MARKETS

This paper empirically examines the dynamic stock return–volume relations for six emerging Asian markets: Indonesia, Malaysia, Singapore, South Korea, Taiwan, and Thailand. Evidence is found that trading volume Granger causes stock return in quantiles and the causal effects of volume are heterogeneous across quantiles. This shows that volume carries some information to the return and could be interpreted in light of theoretical models. In addition, we find that there is bi‐directional causality between stock return and trading volume in most of the markets. The finding indicates that those Asian emerging markets with different institutions and information flows than more mature markets have present similar causal effects on the stock return–volume relation. Furthermore, the cross‐country evidence shows that the US market helps to predict the returns of the emerging Asian markets.     

FINANCIAL CRISES AND INTERNATIONAL STOCK MARKET VOLATILITY TRANSMISSION

This paper examines the interplay between stock market returns and their volatility, focusing on the Asian and global financial crises of 1997–98 and 2008–09 for Australia, Singapore, the UK, and the US. We use a multivariate generalised autoregressive conditional heteroskedasticity (MGARCH) model and weekly data (January 1992–June 2009). Based on the results obtained from the mean return equations, we could not find any significant impact on returns arising from the Asian crisis and more recent global financial crises across these four markets. However, both crises significantly increased the stock return volatilities across all of the four markets. Not surprisingly, it is also found that the US stock market is the most crucial market impacting on the volatilities of smaller economies such as Australia. Our results provide evidence of own and cross ARCH and GARCH effects among all four markets, suggesting the existence of significant volatility and cross volatility spillovers across all four markets. A high degree of time‐varying co‐volatility among these markets indicates that investors will be highly unlikely to benefit from diversifying their financial portfolio by acquiring stocks within these four countries only.     

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.     

THE CAUSALITY BETWEEN STOCK RETURNS AND EXCHANGE RATES: REVISITED

There has been a renewed interest in the determination of causality between stock markets and exchange rates. In nearly all these studies Granger causality tests has been extensively used. In this paper, we employ the standard Granger causality methodology to a research setting similar to that of Granger et al. (2000). We consider the causality between the two markets in nine east Asian economies. We find that the direction of causality tends to demonstrate a hit-and-run behaviour and switches according to the length of period chosen. This implies that great caution should be taken when interpreting Granger causality results.     

The flexibility of household electricity demand over time

Empirical estimates of long run effects on residential electricity demand from changes in the electricity price are usually estimated by cross-sectional variation in the current stock of electric household appliances across households at a certain point in time. Here, we use a discrete–continuous approach modeling the long run effects by investments in new appliances. We apply the annual Norwegian Survey of Consumer Expenditure for the period 1975 to 1994 to estimate the short and long run own price elasticities in the two approaches. We find the estimated long run elasticity only slightly more price elastic than the short run. We also find that the long run elasticity does not differ significantly between the two approaches. The reason for both results is that, since there is no alternative source of energy for these appliances, there are no substitution effects.     

Consumption and stock markets in Asian economies

This paper investigates the causal links between stock market performance and consumption for five Asian economies by applying the bound tests of Pesaran et al. and lag augmented VAR of Toda and Yamamoto . We find two‐way causal relationships between stock market performance and consumption in the cases of Hong Kong and Taiwan in the long run. The existence of such two‐way causal links indicates that stock market performance and consumption mutually affect each other, implying that the previous studies may have overestimated the wealth effect of the stock markets without taking account of the reverse causation from consumption to the stock markets. The short‐run effect of the stock market on consumption is more visible than the long‐run effect in most of the sample economies, suggesting that changes in consumption directly reflect stock market fluctuations.     

Mena Stock Markets Integration: Pre and Post Global Financial Crisis

This paper examines the short‐ and long‐run linkages in pre and post global financial crisis among Middle East and North Africa (MENA) stock markets, between MENA and Chinese stock markets and also between MENA and developed (United States and United Kingdom) stock markets. Results indicate that both long‐run co‐integration relationships and short‐run causal linkages among MENA stock markets increased in post‐crisis than that in pre‐crisis sub‐period. The degree of integration between MENA and Chinese stock markets increased in post‐crisis than pre‐crisis. We also find that the degree of integration between MENA and developed (United States and United Kingdom) stock markets increased in post‐crisis than that in pre‐crisis. The presence of increased linkages among MENA markets, and between MENA and Chinese stock markets and also between MENA and developed (United States and United Kingdom) markets has important implications for portfolio investors and policy makers.     

非流通股对股票市场和上市公司的影响

本文构造了一个股票市场均衡模型来分析非流通股的存在对中国股票市场和上市公司的影响。我们发现非流通股的存在,使得股票市场价格发现机制扭曲,一方面使得股票价格不能真实地反映上市公司的经营绩效,另一方面使得流通股市场的股价波动与流通股比例密切相关。而且从我们的实证分析证实,非流通股比例越高,流通股市场的股价波动就越大,股票价格中含有的非流通股的放大作用越大,非流通股的存在也会影响经理人员的激励和报酬水平。     

中国股票市场对政策信息的不平衡性反应研究

本文将影响股票市场的政策信息区分为"好消息"和"坏消息"。通过 EGARCH 模型研究中国股票市场对"好消息"与"坏消息"的不平衡性反应,指出"好消息"对我国股票市场的影响大于"坏消息"的影响,这与国外股票市场的情况正好相反。根据这一结果本文创建了"信息效应曲线",具体分析我国股票市场对"好消息"与"坏消息"的不平衡性反应的特征,提出现有交易机制下的股价波动模式。     

Economic integration and stock market dynamic linkages: evidence in the context of Australia and Asia

Countries are becoming economically integrated and it is contended that this will also lead to their financial markets becoming integrated. This contention is important since international financial market integration diminishes portfolio diversification benefits and creates contagion risk. We test this contention in this article in the context of the Australasian region. Australia and Asia have experienced very significant economic integration through a rapid growth in their bilateral trade. We utilize a battery of econometric techniques – cointegration, asymmetric generalized dynamic conditional correlations and panel regression models. As expected, we find that trade intensity significantly drives the interdependence between their stock markets in both the short run and the long run. Thus, given the ever increasing economic integration in this region, this finding implies that their stock markets face the risk of contagion, and that investors in these markets would also be confronted with the prospect of lower diversification benefits.