极值理论在股指期货市场高频数据中的VaR研究

本文运用我国沪深300股指期货合约IF1106Q自2010年11月24日至2011年2月18日每5分钟的收盘价高频数据，引入广义帕雷托分布（GPD）代替传统的正态分布，精确描述金融高频数据损失序列的厚尾特征。进而估算不同置信水平下的VaR值，并进行返回检验，结果表明，极值理论方法可以比较精确地度量高频数据的VaR值。     

浅议基于历史模拟法计算VaR的一种改进方法

金融风险管理中常利用VaR技术进行管理。VaR技术具有简单明了的特点。计算的方法也很多。本文提出的一种基于历史模拟法的改进办法,初步克服了历史模拟法对近期风险的不敏感性。并与目前流行的极值理论计算所得VaR做比较,得到在所选数据中,改进的历史模拟法更精确地预测未来的损失。说明在某些场合下,改进的历史模拟法仍然具有操作上的优势。     

资产组合风险的极值Copula模型与实证研究

本文在极值理论POT模型的基础上,引入了Copula连接函数,建立极值Copula模型,给出了组合风险价值VaR的计算公式,并以加元和日元回报为样本进行了实证分析,结果表明,极值Copula模型能较好地度量资产组合的风险,直接加权的方法会高估风险,假设资产组合服从多元正态分布会低估风险。     

极值理论POT模型与阈值选取研究

极端值模型是准确估计"厚尾"分布金融资产回报市场风险的有力工具,本文研究了基于GPD分布的极值理论中的POT模型,并通过比较分析各种方法选取的阈值,得出最优的阈值u,最后通过POT模型计算VaR和CVaR值。     

基于Copula理论的商业银行的市场风险研究

在投资者看好银行股的背景下,结合t-EGARCH模型和极值理论,利用Copula方法对14家上市银行股票进行分析,并通过蒙特卡洛模拟计算单只股票以及投资组合的VaR.结果表明,此方法能很好地量化风险,有助于衡量市场风险.     

次贷危机对跨国资产投资组合VaR的影响研究北大核心CSSCISSCI

本文以两类时变Copula-EVT-VaR模型作为核心研究方法,探讨了次贷危机对于跨国资产组合VaR模型测度准确度的影响,进而对比分析了两类模型的测度精度。研究结果表明,次贷危机的爆发,导致股市间尾部动态极值风险传导的程度显著增强,VaR的测度精度明显降低,通过分散化投资以降低组合风险的作用在一定程度上被削弱。因此在金融危机传染的背景下进行组合投资,应注重对比研究各类风险评价模型的测度效率,谨慎进行资产组合选择以及风险管理。     

中外股指收益VAR和ES的对比分析

极值理论在风险管理中扮演着重要的角色,它是关于市场极端风险的建模和量化的一种主要方法,本文通过极值理论中POT模型来估计用来度量金融市场风险的工具VaR和ES,并以中外股市作实证分析,结果我们发现中国股市相对于美英等国股市的投资风险相对较大,针对这种情况我们提出了相关政策建议。     

中国股票市场风险度量的模型选择与比较研究

分别采用等权移动平均方法、指教加权移动平均方法、GARCH(1,1)方法、GARCH(1,1)-t方法和Pareto型极值分布方法计算上海和深圳股票日收益率的VaR.向后检验表明,Pareto型极值分布方法比其他方法更能准确地反映我国股市的风险.     

基于vine copula的股市风格资产组合风险预警研究

近年来,风格投资已成为一种重要的投资模式。在此背景下,如何有效地对风格资产组合风险进行刻画与预警具有重要的理论与现实意义。本文选取股市风格资产构建投资组合,分别基于传统分布假设与EVT极值理论构建边缘分布;运用三类vine copula模型(C-vine、D-vine、R-vine)刻画风格资产间的相依关系;进一步运用滚动时间窗的蒙特卡罗模拟方法进行组合风险的动态测度,并通过返回测试比较不同风险模型的测度效果;最后基于在险价值(VaR)的预测结果对组合风险预警系统进行构建。研究结果表明:R-vine模型能够相对灵活地刻画风格资产间的相依结构,并取得更高的组合风险测度精度;相较于传统资产分布假设,引入EVT极值理论的风险模型能够更为有效地预测风格资产组合风险状况;基于在险价值所构建出的风险预警系统能够较好地对组合风险进行分级预警,从而为投资者与市场监管部门提供决策参考。     

期货投资组合交易保证金设置研究——基于Copula模型和极值理论的分析

本文以棉花、铜、天然橡胶三个期货合约为研究对象,基于t-Copula模型,利用Monte Carlo模拟法计算在一定权重下由三个品种构成的期货投资组合的VaR和ES值作为投资组合的保证金数值。Kupiec回溯测试结果表明,t-Copula模型结合极值理论计算出的期货投资组合保证金相比其他方法能够在较好覆盖极端风险的同时降低投资成本。     

Almanac of anticipations: The age of affluence—of anticipation—of anxiety—of automation—of discontinuity—of longing—of overkill—of space exploration

With this survey of developments in the futures field since 1945, I.F. Clarke completes his present series for Futures. He makes two major points: that forecasting techniques have become essential tools in the management of change; and that nuclear weapons and ecological problems have added a moral dimension to the study of the future. In the next issue of Futures he will start a new series on the range of future-thinking in the USA, from the expectations of the first settlers to the Star Wars programme.     

对基层人民银行科技工作的几点建议

银监会分设后,人民银行将专司货币政策、金融稳定、金融服务三大职能。作为人民银行的分支机构,基层人民银行的工作重心也将从金融监管调整到这三大职能上来。人民银行的科技部门,就要积极运用科技手段,为人民银行履行新的职能发挥“服务、支持、促进、发展”的作用。一、围绕三大职能搭建五大平台经过“六五打基础、七五作准备、八五大发展”几个阶段后,人民银行相继实现了核算电算化、清算网络化和办公信息化。特别是近一两年来,陆续开通了大额支付系统、信贷登记咨询系统、会计四集中系统、金融信息服务网站等系统,人民银行信息化水平又…     

社会主义所有制形式的改革、完善与共产党执政能力的提高

在中国,所有制形式的调整、改革与完善,先进生产力的发展,党的执政能力建设,是社会主义建设过程中密切结合在一起的三个不同层面的发展关系.应在相互促进和共同提高中促进社会的和谐发展,保证社会主义现代化建设战略目标的顺利实现.     

基金公司经营融资融券业务的问题审视

融资融券业务正式运营已经开展,为证券市场带来了革命性的改革,作为证券市场的一大主体,基金公司面对融资融券也迎来了新的发展方向和挑战,本文从融资融券业务的运行机制入手,分析了基金公司融资融券的新契机,并对其即将面临的问题进行审视和剖析,进而提出策略建议.     

Properties of time-series estimates of degree of leverage measures

Empirical studies suggest that time-series regression estimates of the degrees of operating and financial leverage have a tendency to produce measures less than one. According to ex ante theory, these measures should be greater than one for firms operating above the breakeven point. There have also been suggestions that the biases in these estimates may be attributable to an underlying increase in unit sales. This work presents evidence that these counter-intuitive measures are produced by changes in the firm's operating parameters (unit price, variable cost, fixed cost and interest payments). It further suggests that attempts to control for the underlying change in unit sales substantially increase the volatility of predicted estimates.     

浅议金融机构的举证责任

金融纠纷案件是当事人以存单或进账单、对账单、存款合同、保险单、票据、证券等凭证为主要证据向人民法院提出诉讼的案件,对于不同种类金融纠纷的当事人的举证责任,我国现行的金融法律、法规及司法解释有不同的规定。由于金融机构的特殊法律地位,发生金融纠纷时存在有关当事人将最后偿付风险转移给金融机构承担的主观故意,在客观上会使金融机构难以提供相应的证据来对抗不法债权人的诉讼请求,而导致金融机构败诉。为此,对金融诉讼案件中金融机构的举证责任加以研究具有重要的实践意义。     

金融企业员工考核系统的设计

一、概述 为配合公司人事考核制度的贯彻执行,保证该制度执行过程中各项工作能够长期、高效、准确地完成,我们开发了公司员工考核系统,实现了人事考核工作中员工投票、考核统计、考核信息分析、报表生成等功能,减少了人事部门人员的手工操作,提高了考核工作的自动化程度.     

Summary of Results of Survey of Seminar Attendees

Abstract

The Society of Actuaries undertook a three-phase research project on mortality improvement in the three NAFTA countries: Canada, Mexico, and the U.S. Phase 1 consisted of a literature review of papers on projecting mortality levels in the future and a study of the trend in mortality improvement during this century. Phase 2 consisted of a discussion of different facets of modeling mortality rates at a seminar attended by 79 experts (actuaries, demographers, economists, and medical researchers) representing different countries. The last session of the seminar consisted of the completion of a survey by the attendees to obtain input for Phase 3, which would analyze the impact of mortality improvement on the social security system of each country. This paper summarizes the results of the survey.

The survey results illustrate the difficulty in forecasting mortality levels, because the effects of many factors that could have significant impact on mortality rates are unknown. This suggests the need for dynamic forecasting, which allows for the possibility of random shocks. A majority of the survey respondents believe that stochastic forecasting models, despite their complexity, have significant potential to add value. Respondents also believe that both historical data and cause-specific mortality forecasts are useful as input and also in validating forecasts of the aggregate levels of mortality. The challenge is to develop more sophisticated forecasting models to produce results that are relatively easy to interpret and to communicate these results to the desired audiences, including the public and policymakers.

The survey results suggest that the aggregate effect of lifestyle changes, medical advances, diseases, catastrophe, and physical environmental changes is an increase in life span. However, there is much uncertainty about the future. Respondents expect that beyond the year 2020 the mean annual rate of reduction in mortality for males age 65 and over will average about 0.58% for Canada, 0.76% for Mexico, and 0.67% for the U.S. The results for the female age 65 and over population are 0.64%, 0.83%, and 0.70%, respectively. The age 65 and over population is expected to see larger percentage reductions in mortality than the 0–14 and 15–64 populations. The reductions in male and female mortality will be ultimately the same, and the mortality levels in the three countries will ultimately converge, although differences may persist for decades.     

The Usefulness of Measures of Consistency of Discretionary Components of Accruals in the Detection of Earnings Management

Abstract:  Prior research has shown the prevalence of measurement error in models used to estimate aggregate discretionary accruals. In these models, the incremental information content of the various components of accruals is ignored. Limited prior research and data gathered from firms under Securities and Exchange Commission (SEC) litigation indicate that managers use either one or more than one component of accruals simultaneously, in a consistent way to manipulate bottom-line earnings in a given direction. I propose two measures that capture the consistency between the discretionary components of accruals and test their significance in earnings management (EM) detection in firms that have artificially added accrual manipulation and firms that were targeted by the SEC for accrual manipulation. There is evidence that this information is incrementally useful in detecting EM. This finding paves the way for improvements in the discretionary accruals measure by including consistency information from the components of aggregate accruals.     

我国助学贷款改革刍议--"双担保"机制设计

国家新出台的助学贷款政策,还不过是既有的框架下的局部调整,存在诸多不完善的地方。为此,对国家助学贷款应构建高校与就业单位的“双担保”机制。从长期来看,要构建一个系统有效的“政府部门管理和商业银行运作相结合”、“多层次、多渠道、多方式”、“担保和非担保、贴息和非贴息、市场和非市场运作互相补充”的中国教育金融框架。