Bank systemic risk and macroeconomic shocks: Canadian and U.S. evidence

This paper investigates how banks, as a group, react to macroeconomic risk and uncertainty; more specifically, it examines the relationship between bank systemic risk and changes and disruptions in economic conditions. Adopting the methodology of Beaudry et al. (2001), we introduce a new estimation procedure based on EGARCH to refine the framework developed by Baum et al., 2002, Baum et al., 2004, Baum et al., 2009 and Quagliariello, 2007, Quagliariello, 2009, and we analyze the relationship in the current industry context—i.e., in the context of market-based banking. Our results confirm that banks tend to behave more homogeneously vis-à-vis macroeconomic uncertainty. In particular, we find that both the cross-sectional dispersion of loans-to-assets and the cross-sectional dispersion of non-interest income share shrink during slow growth episodes, and particularly during financial crises, when the resilience of the banking system is at its lowest. More importantly, our main findings indicate that the cross-sectional dispersion of loans-to-assets has increased in the last decade, whereas the cross-sectional dispersion of non-interest income share appears to be more volatile and sensitive to macroeconomic shocks.     

基于EGARCH模型和Bootstrap方法的在险价值度量

针对孤立使用传统的历史模拟法及GARCH类模型进行风险分析的不足,把EGARCH参数模型与Boostrap非参数方法结合起来,给出了基于EGARCH模型和Bootstrap的VaR测度的半参数方法。实证结果表明,基于EGARCH模型和Bootstrap的VaR度量方法比传统的历史模拟法计算的效果更好。     

中央银行沟通可以作为货币政策工具吗——基于中国数据的分析

本文通过检验我国中央银行沟通对金融市场的影响,间接考察了其是否具有货币政策工具的效力。分析结果表明:我国中央银行沟通对短期利率和股票日收益率水平及波动性具有显著的、与预期一致的影响,但对长期利率的影响不明显;书面沟通与口头沟通相比,后者的效力更强一些,并且在口头沟通中,中央银行行长比其他人更能影响金融市场。主要的政策含义是沟通可以作为我国货币政策一种新的工具,与传统的工具配合使用有利于提高货币政策的有效性。     

Stock Market Volatility in an Emerging Market: Further Evidence from the Athens Stock Exchange

We investigate the time series properties of the daily and weekly returns from the Athens Stock Exchange (ASE) index for the years 1987 to 1997. We investigate whether important time-series characteristics have changed significantly over time. The Greek market has recently undergone major changes including complete capital flow liberalization, the implementation of computerized trading, as well as significant increases in market volume and capitalization; we thus contrast the 1987–90 and 1991–97 periods. Our findings suggest the dynamics of the ASE composite index returns have changed as the market has developed.     

Information transmission between the Gulf equity markets of Saudi Arabia and Bahrain

This paper examines whether the emerging Gulf markets of Saudi Arabia and Bahrain in conjunction with the US market exhibit cointegrating relationship. Additionally, the transmission of information and volatility spillover between the Gulf markets is explored using a bivariate EGARCH model. We find that although the markets are not cointegrated, the Gulf markets do share information flows. Specifically, we observe an asymmetric spillover of volatility from the smaller though more liberal and accessible Bahraini market to the larger and less accessible Saudi market. The observed difference in information processing may partly be due to a well-developed Bahraini financial sector that encourages wider participation by international investors who play a significant role in assimilating new information.     

小麦期货收益时间序列分析

本文研究了我国郑州商品期货交易所小麦期货近三年来的收益时间序列,对其进行了基本的统计学分析,结果发现分布是非正态的,较正态分布有尖峰厚尾,具有长记忆效应。进一步对其中具有ARCH效应的序列合约进行了分析,采用GARCH和EGARCH类模型进行了描述,分析了期货收益的波动集群性和杠杆效应。     

中国股票市场波动非对称性的行为金融学解释

本文采用EGARCH与TARCH模型,以2003年6月30日至2008年6月27日的上证综指和深证综指日收益率为研究样本,对中国股票市场价格波动的非对称效应进行了检验,证实了中国股票市场存在对信息反应的不平衡,即:"利空消息"对股票价格的冲击大于"利多消息"对股票价格的冲击。鉴于国内研究对这种不对称的解释仅限于宏观层面,本文基于行为金融学理论,从投资者非理性行为出发,研究得出投资者的损失厌恶与反应过度的认知偏差是导致其对"利空消息"反应过度的根本原因。     

深交所收盘集合竞价制度的实施效果研究

作为交易制度创新的收盘集合竞价制度于2006年7月在深交所主板实施,本文应用事件研究的方法和EGARCH模型,对沪深股价指数及个股在收盘集合竞价制度实施前后的相对成交量和波动性特征进行比较研究,考察该制度的实施对市场微观结构的影响,结果认为收盘集合竞价的实施基本达到预期政策目标。     

基于EGARCH模型的我国向美国出口变动杠杆效应分析

本文运用EGARCH计量模型,对我国向美国出口增速变动进行杠杆效应分析。模型结果显示,出口增速在负向冲击下比受到正向冲击时的波动更加剧烈。次贷危机的恶化,也将会对我国向美国出口增速产生较大的负面影响,从而影响我国的整体出口。对此,文章给出了相关建议。