基于极值理论的我国期货市场保证金设置研究——经流动性风险调整后的优化设置

传统的期货VaR风险度量模型缺乏对流动性风险的考虑。本文以变现成本为依据构建期货流动性指标,将流动性风险纳入VaR模型的研究,并结合中国期货市场实际特点。以上海金属铜、郑州硬麦和大连大豆为样本运用极值理论进行了实证研究,结果表明,农产品期货硬麦、大豆的流动性风险大于工业品金属铜期货的流动性风险;并且在衡量我国期货保证金设定时发现,对于我国期货市场,流动性风险是一个不可忽略的风险组成部分。为此。通过建立流动性风险调整后的保证金优化设置模型,使所设置的保证金水平能够涵盖整个期货市场的价格风险与流动性风险。     

基于隐性营销的品牌塑造与推广策略研究

隐性品牌塑造与推广作为一种新的理念,以其在品牌塑造与推广领域独特的优势日益引起人们的重视.本文初步探讨了隐性品牌塑造与推广策略以及在实施该策略时应注意的问题.     

直接序列扩展频谱系统设计

本文针对一种卫星定位通信系统中的用户站阐述了直接序列扩展频谱系统的信号特征、信道设计要点、伪码同步问题及设备测距精度分析,给出了工程设计方法及计算公式.性能实测结果与理论分析相吻合.     

沪深300股指期货跨期套利实证研究——基于真实交易数据的计量分析

沪深300股指期货的上市为股指期货跨期套利研究的实证分析提供了真实的数据基础。本文在对期货套利的概念和种类进行介绍的基础上,构建股指期货跨期套利模型,最后,以沪深300股指期货真实交易数据为基础进行了实证分析,结果显示,目前,国内股指期货市场存在较多的跨期套利机会,市场有效性缺失,并对此结果提出了相应的政策建议。     

信用风险溢价还是市场流动性溢价:基于中国信用债定价的实证研究

我国信用债定价与成熟市场国家信用债定价存在显著差异,并未随着经济周期运行中违约风险的变化而产生明显调整。研究发现,我国市场主体普遍存在对信用债刚性兑付的预期,且倾向于采用信用债进行套利交易,这种行为导致信用债信用利差更多体现的是市场流动性溢价,而非信用风险溢价,因而反映市场流动性状况的货币市场利率水平、波动性对信用债定价具有较为重要的影响,而模糊了对手方信用的中央对手方的质押回购制度安排进一步强化了这种影响。     

Heuristics for operational fixed job scheduling problems with working and spread time constraints

Operational fixed job scheduling problems select a set of jobs having fixed ready and processing times and schedule the selected jobs on parallel machines so as to maximize the total weight. In this study, we consider working time and spread time constrained versions of the operational fixed job scheduling problems. The working time constraints limit the total processing load on each machine. The spread time constraints limit the time between the start of the first job and the finish of the last job on each machine. For the working time constrained problem, we present a filtered beam search algorithm that evaluates the promising nodes of the branch and bound tree. For the spread time constrained problem we propose a two phase algorithm that defines the promising sets for the first jobs and finds a solution for each promising set. The results of our computational tests reveal that our heuristic algorithms perform very well in terms of both solution quality and time.     

Performance and informed trading. Comparing foreigners,institutions and individuals in an emerging stock market

Do local institutions, local individuals or foreigners perform better in a small emerging market? We seek answers to this question by examining the investment performance of each group of investors using two unique databases of Colombian stocks. Our analysis serves as an out-of-sample test of previous findings. We find that local institutions have better outcomes than foreigners and local individuals on all performance measures. Furthermore, local individuals perform better than foreigners on trading execution, while foreigners generate better long-term returns. Using a bid-ask spread decomposition, we provide additional evidence that the better performance of institutions is consistent with informational advantages. Our findings reconcile contradictory statements from previous studies.     

Information asymmetry around operational risk announcements

Operational risk incidences are likely to increase the degree of information asymmetry between firms and investors. We analyze operational risk disclosures by US financial firms during 1995–2009 and their impact on different measures of information asymmetry in the firms’ equity markets. Effective spreads and the price impact of trades are shown to increase around the first announcements of such events and to revert after the announcement of their settlement. This is especially pronounced for internal fraud and business practices related events. Market makers respond to higher information risk around the first press cutting date by increasing the quoted depth to accommodate an increase in trading volumes.The degree of information asymmetry around operational risk events may be influenced by the bank’s risk management function and the bank’s governance structure. We indeed find that information asymmetry increases more strongly after events’ first announcements when firms have weaker governance structures—lower board independence ratios, lower equity incentives of executive directors, and lower levels of institutional ownership. In contrast, the firms’ risk management function has little to no impact on information asymmetry. We interpret this as evidence that the risk management function is primarily driven by regulatory compliance needs. The results of this study contribute to our understanding of information asymmetry around operational risk announcements. They help to shed light on the role that regulation and corporate governance can play in order to establish effective disclosure practices and to promote a liquid and transparent securities market.     

浮动利率债券久期和凸性的研究

本文首先推导了浮动利率债券的利差久期、利率久期、利差凸性和利率凸性的封闭式计算公式,适用于任意结算日。随后对久期的敏感性研究发现,浮动利率债券的利差久期总体上大于利率久期,且二者都是距离下一付息日时间的递增函数;利差久期是剩余付息次数的递增函数;在贴现利差大于（等于、小于）基本利差时,利率久期是剩余付息次数的递减（不变、递增）函数;利率久期和利差久期都是贴现利差的递减函数。最后使用封闭式公式计算四支浮动利率债券的久期和凸性,同时计算有效久期和有效凸性来检验,发现两种计算方法的结果很接近。     

广告对企业文化传播的再讨论

广告本质上就是一种文化,从表面上看,广告是推行产品的一种手段,谁也不会否认广告的商业目的.但广告在为商品进行宣传的同时,自觉或不自觉地输出某种技术意识,改变这人们的思想和价值观念,引导这人们的行为和生活方式,给予人们一定的精神需求.