从风险管理视角看B-S模型及其发展

金融风险是指由于金融资产价值的不利变动而使金融机构遭受损失的可能性.现实的经济和金融市场并非完美,因此,通过风险管理可以提升公司价值.论述了金融风险管理的理论和技术基础--Black-Scholes期权定价模型以及其演变发展,进一步分析了这一演进给对我国金融业发展的启示,从而对防范金融风险提出有益的建议.     

物联网产业联盟风险评估——基于变权理论与可拓理论的结合

将变权理论与可拓理论相结合,构建了用于评估物联网产业联盟风险的变权可拓模型。用物元概念和可拓集合来判断联盟风险属于某等级风险的程度,利用距函数定义关联度,从而使识别定量化和精确化;运用变权理论,根据不同条件取适当的指标权重以反映其本质属性,克服了传统常权赋值的局限。最后,以无锡"感知中国"物联网联盟为例,运用提出的风险评价方法对其风险进行评估。结果表明,该方法具有科学性和有效性。     

中国农业保险的赔付风险:风险测度与应对策略——基于1984~2012年农业保险与财产保险赔付率的滤波分解与比较

由于农业保险所承保的农业自然灾害具有统计学上的不可预测性,灾害学上的时空延展性和经济学上的不可控性,使得经营农业保险的保险公司面临较高赔付风险. 为测算我国农业保险的赔付风险度,收集整理1984~2012年农业保险与财产保险赔付率数据,采用H-P滤波分解法对其进行长期趋势与短期波动的分解和比较分析. 研究发现:我国农业保险整体赔付水平和赔付的波动幅度远高于财产保险,验证了农业保险具有高风险经营的特性. 但是近年来,农业保险长期赔付趋势呈现平稳略微下降态势,短期波动幅度逐步收敛. 未来随着经营主体的增加,农业保险经营中须把握保险保障度的提升与保险公司经营风险管控的有效平衡;农业保险的适当盈利性与福利改进的有效融合.     

基于LASSO变量选择方法的投资组合及实证分析

由于传统的Markowitz均值方差模型具有很强的不稳定性,且容易产生较大的空头头寸,因此,资产选择成为构建投资组合的一个研究热点。针对以风险分散和指数跟踪为目的的资产组合构建提出了基于变量选择观点的LASSO选择方法,说明了LASSO方法在资产选择中的优势,并应用LASSO方法使用2010年3月到2012年2月的日收益率数据对沪深300指数的指数跟踪做了实证检验,结果表明LASSO方法在组合构建和预测中都有很好的效果。     

Testing commodity futures market efficiency under time-varying risk premiums and heteroscedastic prices

We propose a novel test to measure market efficiency while estimating the time-varying risk premiums of commodity futures, given that the prices are heteroscedastic. The risk premium is estimated using a state-space model with a Kalman filter modified for heteroscedasticity. Using 79 commodity futures traded on 16 exchanges during the period 2000–2014 and a Monte Carlo simulation, we demonstrate that the proposal produces robust results compared with conventional approaches. The global financial crisis has improved the efficiency and affected the trading volumes of commodity futures, but it has had no effect on the average or the volatility of risk premiums.     

高校财务风险的形成机理及防范机制分析

大量举债、资金运营以及学费拖欠等给高校财务管理带来极大风险。构建高校财务风险防范机制必须发挥政府主导作用,在加大教育经费投入的基础上规范高校办学规模;引导社会力量进入办学领域,在营造社会办学环境的基础上拓宽筹资渠道;建立现代大学制度,在规范管理的基础上强化内部监督;提高银行向高校贷款的门槛,在严格控制贷款规模的基础上落实还款渠道。     

商业银行流动性危机传染机理研究

银行危机传染往往给一个国家或地区的经济带来巨大的损失.不完全的银行间拆借市场中隐含了更大的银行危机传染的可能性;银行间的长期资产越多,银行间拆借的短期利率和银行间存款的长期利率越高,银行间拆借市场就越稳定,在遭受流动性冲击时,这一市场发生银行危机传染的可能性就越小.适量的银行存款对传染效应具有阻碍作用.为防范系统性风险,中国商业银行应逐步建立完备的银行间存款市场,减少政府干预,让市场约束力来强化商业银行的风险管理意识.     

The impact of country risk ratings on U.S. firms in large cross-border acquisitions

This study investigates the impact of country risk ratings on the wealth gains to large U.S. bidders involved in cross-border acquisitions. The findings indicate that U.S. bidders experience positive wealth gains during the merger announcements, though this is concentrated in transactions involving European targets. There are also differences in wealth gains to bidders with respect to industry classification and location of foreign targets. The country risk factors including economic, political, and financial risk ratings all play a significant role in explaining the wealth gains to bidders. Furthermore, the wealth gains are higher for the firms with acquisitions in developed countries and are significantly related to GNP growth rate.     

地方政府融资平台的法律风险及控制

截至2010年底,全国省、市、县三级地方政府性债务余额共计10.7万亿多元,存在着巨大的债务风险,主要表现在财政、金融和法律等方面.对风险的控制主要通过完善与地方政府融资相关的法律、建立和完善地方偿债机制及问责机制、推动地方政府融资法定化和平台融资市场化等方面进行.     

Performance Volatility and Wage Elasticity: An Examination of Listed Chinese A-share Enterprises

The management of future financial risk on the part of managers and changes in firm finances are two of the fundamental reasons for upward and downward rigidity of wages. The proxy variable for firm financial risk is volatility, the past performance of which is among the principal indicators of wage rigidity. In firms whose current performance is on the upswing, the greater the volatility in past performance, the smaller the elasticity ratio and the more acute the upward rigidity; the more stable past performance, the larger the elasticity ratio and the more acute the upward elasticity. In firms in which current performance is declining, greater past performance volatility leads to a larger elasticity ratio and more acute downward rigidity, whereas more stable such performance leads to a smaller elasticity ratio and more acute downward rigidity.