基于风险共担的供应链融资渠道研究

伴随着现代物流进入21世纪,供应链的衍生服务项目——融资服务正在逐渐兴起。资金周转的压力造成生产商急需相关的融资服务来缓解资金流上的时间风险。在采购融资、存货融资、保理业务等核心服务的基础上,3PL开始了自己的金融服务。但是由于信息不对称,3PL遇到了逆向选择问题。实现风险共担的延迟策略不仅解决了库存成本过高的问题,也为供应链带来了新的融资模式。     

基于EGRACH模型的股指期货对股市非对称性波动影响的实证研究

本文基于EGRACH模型,利用高频数据,实证检验了沪深300股指期货对我国股市非对称波动的影响。实证研究表明,沪深300股指期货与现货市场之间存在互为格兰杰因果关系,在股指期货初期股指期货对股市的波动有放大作用,在远期降低了非对称性波动,具有稳定股市的功效。     

碳排放权市场价格发现功能的实证分析

碳期货市场在碳市场扮演着极为重要的角色,通常具有价格发现的功能。本文分析了国际碳排放权交易市场两种主要商品EUA、CER的期货价格关系．通过向量误差修正模型和公共因子模型对欧盟碳期货EUA与CER期货进行了实证研究。结果显示：EUA、CER这两种主要碳排价格指标之间具有很高的相关性,存在长期均衡的协整关系,均扮演着重要的价格发现角色,同时EUA期货价格引导CER期货价格变化。     

中国金融创新的政策选择、法律制约与制度突破

创新是中国金融业改革发展的客观要求。虽然金融创新的过程中伴随着各种风险的产生,但这并不能成为抑制金融创新的理由。后金融危机时代的中国金融业应该继续加大创新力度,提高金融市场的竞争能力,在金融创新产品的专利权保护、金融监管、金融业的内部风险管理和外部政策完善等方面寻求制度突破。     

存货购销中最优期权合约交易量研究

在分析利用期权合约规避价格波动风险的原理的基础上,分别给出存货购销两个环节中可以运用的期权策略,然后利用均值方差模型计算使投资组合达到效用最大化时所对应的最优期权合约交易量及其对经营利润的影响,研究发现：在存货采购环节,企业可以通过购入看涨期权、购入看涨期权同时售出看跌期权两种策略控制采购价格波动的风险,在存货销售环节,企业可以通过购入看跌期权、同时购入看跌期权并售出看涨期权两种策略来稳定销售利润;从最优期权合约交易量及其对企业经营利润的影响来看,期权工具在控制存货采购价格、稳定销售利润中可以发挥良好作用。     

Adaptive market efficiency of agricultural commodity futures contracts

In this paper we investigate the adaptive market efficiency of the agricultural commodity futures market, using a sample of eight futures contracts. Using a battery of nonlinear tests, we uncover the nonlinear serial dependence in the returns series. We run the Hinich portmanteau bicorrelation test to uncover the moments in which the nonlinear serial dependence, and therefore adaptive market efficiency, occurs for our sample.     

企业套期保值研究及实证分析--基于基差复制技术的方法

文章针对企业套期保值过程中由于套保比率的设定以及入市点的错误选择使得企业面临亏损风险的问题而提出对策。笔者在套期保值比率问题上首次引入了寻找合理判断入市点的模型并给出了具体方法。利用金融工程中无套利的复制原理,复制出了一个远期的权益,从而得出了文章所认为的最优套保比率,为实务界经常运用的选择入市点问题给予理论支持。文章构建的模型得出,在套保比率的设定问题上不但要选择入市点,还要选择套保的时间因素。在买期保值上,当判断出市场行情有利时我们选择相对较大的保值比率,这样可以使我们能尽量获取基差上扬所带来的收益,另外又不至于把套保比率无限扩大使得套保变成投机,以防在万一出现行情错误的时候出现大幅亏损。在卖期保值上,当判断行情有利时,选择相对较低的保值比率,这样可以使我们能尽量获取基差下跌所带来的收益,另外又不至于把套保比率无限缩小甚至不保使得套保变成投机,以防在万一出现行情错误的时候亏损。     

股票期权的激励机理及再设计

股票期权是西方完善市场机制的产物,作为一种薪酬制度安排,其本质是通过经营者对所获期权时间价值的追逐来实现所有者和经营者的长期激励相容。但在我国目前条件下,考虑到市场的不规则,国企产权的不清晰及相关法律的不健全等现实障碍,在引进的同时加强对股票期权的再设计是比较符合中国的国情的。为此,必须妥善解决好一系列的问题,使股票期权在中国的推行更具有现实性。     

期权思想在项目评估中的应用

传统的现金流折现项目评估法由于没有考虑企业在项目投产后进一步决策的权利,可能会使企业错过应有的投资机会或承担不必要的投资风险。在引入放弃价值和放弃期权后,可以大大改善企业对投资项目的评估效果。同时,放弃期权对投资项目有着价值提升和风险规避的作用。     

HIGH‐ORDER SHORT‐TIME EXPANSIONS FOR ATM OPTION PRICES OF EXPONENTIAL LÉVY MODELS

The short‐time asymptotic behavior of option prices for a variety of models with jumps has received much attention in recent years. In this work, a novel second‐order approximation for at‐the‐money (ATM) option prices is derived for a large class of exponential Lévy models with or without Brownian component. The results hereafter shed new light on the connection between both the volatility of the continuous component and the jump parameters and the behavior of ATM option prices near expiration. In the presence of a Brownian component, the second‐order term, in time‐t, is of the form , with d₂ only depending on Y, the degree of jump activity, on σ, the volatility of the continuous component, and on an additional parameter controlling the intensity of the “small” jumps (regardless of their signs). This extends the well‐known result that the leading first‐order term is . In contrast, under a pure‐jump model, the dependence on Y and on the separate intensities of negative and positive small jumps are already reflected in the leading term, which is of the form . The second‐order term is shown to be of the form and, therefore, its order of decay turns out to be independent of Y. The asymptotic behavior of the corresponding Black–Scholes implied volatilities is also addressed. Our method of proof is based on an integral representation of the option price involving the tail probability of the log‐return process under the share measure and a suitable change of probability measure under which the pure‐jump component of the log‐return process becomes a Y‐stable process. Our approach is sufficiently general to cover a wide class of Lévy processes, which satisfy the latter property and whose Lévy density can be closely approximated by a stable density near the origin. Our numerical results show that the first‐order term typically exhibits rather poor performance and that the second‐order term can significantly improve the approximation's accuracy, particularly in the absence of a Brownian component.