金融危机后中国股市波动性结构变化测度及其原因分析

以2005年4月至2010年4月我国沪深300指数为研究对象,使用调整后的EGARCH模型,对金融危机前后中国股市的波动性进行研究。结果显示:金融危机发生后中国股市的波动性明显减弱———这与美国股市明显不同,且波动性结构发生了显著性变化,表现为美国股市对中国股市的影响减弱、中国股市波动的持久性增强等。最后,对产生这些变化的原因进行了理论分析,指出金融危机发生后贸易保护主义抬头、刺激性的宏观经济政策出台是中国股市波动性结构变化的可能原因。     

Volatility spillovers and macroeconomic announcements: evidence from crude oil markets

The paper applies an event study methodologyaims to investigate the macroeconomic announcements effects on Standard&Poor’s500 and oil prices. Our results provide evidence for a significant impact of the US macroeconomic news on oil prices. This impact is split into two components, namely the direct effect (common response) and indirect effect (volatility transmission). Altogether our results show that the volatility transmission is bidirectional. Not only a significant volatility transmission from the oil market to the US stock market is revealed, but also a high volatility transmission is recorded from the oil market to the stock market especially after the release of consumption indicators.     

股市收益率与波动性长期记忆效应的实证研究

股票市场长期记忆效应问题是近来金融实证研究的一个热点.多数的研究集中在收益率长期相关性的考察上,较少有对波动率序列的研究.然而,波动率的长期记忆性不仅会导致金融市场上的波动持久性特征,而且将对波动率的预测与衍生证券定价产生重要的影响.基于此,本文通过修正的R/S分析与ARFIMA模型对我国股市收益率及其波动性的长期相关性进行了实证研究.结果表明:中国股市具有显著的非线性特征,虽然收益率序列的自相关性较弱,但波动性序列却表现出显著的长期记忆效应.这一结论将为研究股票价格行为特征与金融经济学理论提供新的方向.     

我国货币政策与股票市场的实证分析

资本市场是现代金融市场最主要构成部分之一,对实际经济生活的影响日益增大。通过我国股票市场与经济增长的实证检验可知,货币政策与资本市场是一种互动关系。一方面,中央银行的货币政策会直接或间接地影响资本市场;另一方面,资本市场的发展对货币政策及其传导机制有深刻的影响。     

我国股票市场与经济增长的长期关系——基于协整的实证研究

本文选择1992—2007年的GDP增长率和上证综合指数作为我国股票市场价格指数与我国经济增长关系的研究依据,运用协整分析方法,实证研究了两者之间的长期关系。研究发现:中国的股票市场与经济增长之间不存在协整关系,这说明中国股票市场的发育还不成熟,某种程度上,股票市场还不具备促进经济增长的作用。     

中国股票市场与经济增长关系的实证研究

股票市场与经济增长一直是近年来的热点问题,在国外的相关研究中,大多数认为股票市场通过其功能作用促进了经济增长,而我国情况又如何呢?我们在前人的研究成果上,对股票市场与经济增长关系运用协整分析和格兰杰检验作实证分析。结果显示,换手率和上市公司数目增长率与经济增长不具有协整关系。而资本率和交易率与经济增长具有协整关系,但他们不是经济增长的格兰杰原因;反之,则成立。因此,加强法制建设,规范股票市场,使其发挥应有的作用是当前的关键所在。     

中国股市波动性聚类特征参数与非参数分析

从分析中国股市收益率序列的特征入手,寻找描述中国股市波动性特征的合适的统计模型。重点对中国股市收益率序列的波动性聚类现象进行研究。运用描述统计学方法,广义自回归条件异方差模型,以及非参数统计方法等多种方法进行广泛探讨。结合具体的数据分析,从多个角度刻画出中国股市收益率序列的波动性聚类现象的参数与随机性特征。     

我国证券市场正反馈交易的实证检验

正反馈交易是投资者依据证券t-1期收益高低决定其第t期买卖行为的一种交易策略,这种交易策略广泛存在于世界各国的证券市场中,使证券市场表现出超常的波动性。本文使用上证指数和深证指数对我国证券市场的正反馈交易进行了实证研究,结果显示我国证券市场同样存在显著的正反馈交易现象,这种现象降低了市场的稳定性。     

Lunacy in the Stock Market—What is the Evidence?

Popular culture and folklore have long recognized the influence of the lunar cycle on plant, animal, and human behavior. Many of the effects have been validated in the physical and biological sciences. However, until recently such effects have been largely, if not completely ignored in the academic literature of financial economics. This study aims to contribute to answering whether there is, as some claim, a lunar influence on stock prices or volatility. The findings of this work support the Efficient Markets Hypothesis—no consistent, predictable lunar influence is found on either daily returns or daily price volatility in the Dow Jones Industrial Average, for either new or full moons. Some effects are found, but not consistent or predictable with lunar and calendar information alone.      

The interplay between labor market rigidity and volatility-growth nexus

Using a simple innovation‐driven growth model I investigate to what extent labor market regulations underlie the devastating effects of output volatility on long‐run growth trends. Empirical analysis conducted for 154 countries over the 1996–2005 period shows that an increase from low values of the rigidity of employment index strengthens the influence of volatility on growth. This effect weakens with further increases in rigidity. Hence implementation of labor protection legislation is recommended in economies frequently hit by shocks.     

Does the stock market contain information about economic growth? Time-varying out of sample causality tests

We present a new approach to conduct time-varying out of sample causality tests and apply our method to examine the information content of the stock market for economic growth in the US context. We show that equity valuations convey little information in the period after the 1960s. Particularly, there is no evidence to suggest that the recent bull market in equities is indicative of higher future economic growth. Hence, our results are against the argument that the stock market should be included as a leading indicator in economic policymaking.     

我国通胀对股票市场条件波动影响研究

将通胀引入标准GARCH模型,分别研究我国通胀率、通胀率变化和移动平均通胀率对股市条件波动的影响。实证结果表明通胀对我国股票市场条件波动几乎不存在影响,从而否定了通胀会使投资者预期经济变坏,更加厌恶风险,以致引起资产价格剧烈波动的假说。     

What matters in the finance–growth nexus of advanced economies? Evidence from OECD countries

Over the last decades, a large strand of finance and growth literature has provided ample evidence on the importance of financial deepening for economic development. Yet, recently, the focus of public debate has shifted towards the role of the financial system structure, an area in which empirical research remains relatively sparse and exploratory in nature. With this article, we aim to contribute to that debate by analysing the role the financial system structure plays in economic growth and risk. Focusing on stock markets and studying OECD economies over 1994–2013, we find that, ceteris paribus, financial systems with relatively larger stock markets facilitate economic growth and dampen economic risk. Our findings remain robust under application of instrumental variable and system generalized method of moments estimators, as well as when we use an alternative definition of stock market development, estimate median regressions, examine relatively high-frequency annual data, control for systemic banking crises or apply quadratic specifications. We find no such effect for private bond markets or private credit volume. Overall, our results suggest that financial system structure matters for the economic development of advanced economies and highlight the importance of a debate about the optimal structure of an economy’s financial system.     

中国房价波动、股价波动对经济波动及居民消费影响的揭示

房价和股价波动如何影响宏观经济,又如何对居民消费产生影响?这是很多人都感兴趣却又让人迷惑的问题。本文运用相关性检验、方差分解和格兰杰因果检验对中国1998-2010年间中国房价、股价、居民消费和经济波动的特征及根源进行了较为全面的互动研究。结果发现,四者关系复杂,各变量均呈现出一定的顺周期特性且互相关联,房价和股价波动会早于经济波动和消费波动,这说明房地产和股票确实是宏观经济的晴雨表。但研究还发现,房价和股价波动对居民消费和经济波动冲击的影响力度不大,而居民消费与房价波动和经济波动之间均存在双向因果关系。而且,房价波动对经济波动的影响更为复杂,可通过消费和股价波动两个传导途径间接作用于经济波动。     

Skill Intensity in Foreign Trade and Economic Growth

This paper explores the link between trade structure, trade specialization and per capita income growth. It is argued that industrial upgrading in export specialization patterns has a positive long-run growth effect, while the effect of structural change in industrial import patterns is in principle ambiguous. A standard empirical growth model is augmented by various measures of structural change. The hypothesis that not trade per se matters, but that various types of trading activities impact differently on economic growth is tested on a sample of 45 countries (OECD members and selected Asian and Latin American countries) over the period 1981–1997. The data set comprises exports and imports for 35 manufacturing industries at the 3-digit level of the ISIC classification which are grouped according to skill intensity. The results of the dynamic panel estimation point towards a positive long-run growth effect arising from trade specialization in medium-high-skill-intensive industries. Further, important distinctions between the skill intensity of export and import patterns and their respective influence on economic development, as well as between the group of developing countries and OECD members are observed in this relationship.JEL classification: C23, F43, O19, O41, O57The author is grateful to Michael Landesmann and Robert Stehrer (wiiw), Neil Foster and Jesús Crespo Cuaresma (Department of Economics, University of Vienna), Michael Peneder (Austrian Institute of Economic Research) and two referees for valuable comments. This research is based on Jubiläumsfondsprojekt Nr. 8954, financial support by Oesterreichische Nationalbank is gratefully acknowledged.     

我国股市收益波动特征及政策因素影响分析

基于用ARCH类模型对我国股市收益波动进行的实证分析表明,我国股市收益波动具有“时变性”、“集群性”和“不对称性”三个特征;但在我国,政策因素作为影响股市走势的一个重要变量的事实比较明显。而政策因素的影响作用,一方面会中断股市长期运行的走势;另一方面容易加剧下一阶段股市长期运行的波动程度。     

Exchange rate volatility–economic growth nexus in Uganda

The global financial crisis has disrupted trade and capital flows in most developing economies, resulting in an increased volatility of exchange rates. We develop an autoregressive distributed lag model to investigate the effect of exchange rate volatility on economic growth in Uganda. Using data spanning the period 1960–2011, we find that exchange rate volatility positively affects economic growth in Uganda in both the short run and the long run. However, in the short run, political instability negatively moderates the exchange rate volatility–economic growth nexus. These results are robust to alternative specifications of the economic growth model.