权证隐含波动率在标的证券波动率预测中的作用研究

资产收益的波动是投资者投资决策的主要依据.本文选取了葛州和长虹等七只权证作为样本.首先应用单位根检验,验证各样本历史波动率和隐含波动率序列的平稳性,在此基础上检验各样本两种波动率序列的协整关系.最后,对隐含波动率所包含的额外信息进行探讨.结果表明,已实现波动率和隐含波动率基本上呈现单位根状态,并且两者之问基本不存在协整关系,权证的隐含波动率确实拥有额外的信息.投资者在实际运作中,可以加入隐含波动率来提高对实际波动率预测的准确性.     

东北某探区油页岩资源开发项目经济评价

油页岩资源经济评价的主要任务是评价油页岩开发建设项目的经济可行性,常用的评价方法有静态法和动态法两种,关键指标有财务内部收益率、投资回收期、净现值和现值指数等。文章以东北某探区油页岩开发项目为例,采用动态评价方法对该项目的经济可行性进行了研究,并具体介绍了相关指标的选取方法,对于提高油页岩开发项目经济评价的准确性和决策效率有一定的参考作用。     

Are VIX futures prices predictable? An empirical investigation

This paper investigates whether volatility futures prices per se can be forecasted by studying the fast-growing VIX futures market. To this end, alternative model specifications are employed. Point and interval out-of-sample forecasts are constructed and evaluated under various statistical metrics. Next, the economic significance of the forecasts obtained is also assessed by performing trading strategies. Only weak evidence of statistically predictable patterns in the evolution of volatility futures prices is found. No trading strategy yields economically significant profits. Hence, the hypothesis that the VIX volatility futures market is informationally efficient cannot be rejected.     

中、美、日实际均衡汇率模型的构建及实证研究

本文基于BEKK-MGARCH模型建立了中、美、日三国的实际均衡汇率方程和方差方程,对1994年以来中国、美国和日本的实际均衡汇率及其波动溢出效应进行了深入细致的分析。结果表明:三个国家的实际均衡汇率受其经济基本面因素的影响不同,人民币实际均衡汇率还受到了美元和日元实际汇率的影响;中美、中日、美日之间的联动关系存在显著的ARCH和GARCH效应。     

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.     

资产组合风险度量与选择之文献述评

根据资产组合理论的本质，理解和掌握资产组合理论具有重要的意义。本文主要从风险度量方法比较、现实金融资产收益的实际分布与相关性、以及金融资产收益的动态变化特征等角度：对资产组合风险度量与选择的相关文献进行回顾与评述。     

Exchange rate volatility and regime change: A Visegrad comparison

We analyze exchange rate volatility in the Visegrad Four countries during the period in which they abandoned tight regimes for more flexible ones. We account for path dependency, asymmetric shocks, and movements in interest rates. In addition, we allow for a generalized error distribution. The overall findings are that path-dependent volatility has a limited effect on exchange rate developments and that the introduction of floating regimes tends to increase exchange rate volatility. During the period of flexible regimes, volatility was mainly driven by surprises. Asymmetric effects of news tend to decrease volatility under the floating regime. Interest differentials impact exchange rate volatility contemporaneously under either regime, although we find no intertemporal effect of interest differentials. Journal of Comparative Economics 34 (4) (2006) 727–753.     

长三角地区投资环境评价研究

长三角地区是我国经济最活跃的地区之一.文章选取了长三角地区的16个城市作为研究对象,提出了投资环境评价指标,并运用粗糙集理论和特征向量法对该地区的投资环境进行评价,最后得出16个城市的得分和排序.     

Empirical evidence on the impact of external monitoring on book–tax differences

This study investigates whether institutional ownership levels are associated with levels of and time-series variability in book–tax differences (BTDs). Firm and year fixed-effects regression results suggest that institutional ownership is negatively associated with total, permanent, and temporary BTDs. This effect is driven primarily by permanent BTDs in the pre-SOX era but is consistently present for both permanent and temporary BTDs post-SOX. Further, this negative association is present regardless of firms' classification as “tax planners” and/or “earnings managers.” Finally, the results provide some evidence that stronger monitoring by the board and audit committee (i.e., a smaller and more independent board and a larger audit committee) is associated with lower permanent BTDs but is not consistently related with total or temporary BTDs. Overall, these findings are consistent with higher levels of institutional ownership equating to more effective monitoring of management, resulting in lower BTDs (in terms of both levels and time-series variability).     

国际资本流入的易变性及其对策研究

国际资本流入的易变性是影响一国金融稳定的主要因素,主要表现在国际资本在短期内过度流入,并在特定环境下迅速逆转。本文采用1980-2008年78个国家和地区的数据,运用变异系数法对国际资本的三种类型(直接投资、组合投资和其他投资)的易变性分别进行了测算和比较,并采用广义的自回归条件异方差(GARCH)模型,对易变性的决定因素进行了面板数据检验。结果表明,组合投资和其他投资的易变性要显著大于直接投资,经济增长率、制度质量对FDI易变性产生影响,而国内金融体系结构、汇率波动和通货膨胀等则造成各国非FDI资本易变性的差异。这一发现对各国资本流动管理具有重要启示。