Seasonal and stochastic effects in commodity forward curves

In this paper we develop a new model for the dynamics of forward curves of commodities exhibiting seasonalities, such as natural gas, electricity or agricultural commodities. In the existing literature on the subject, the first state variable in multi-factor models is the commodity price, which combines seasonal and stochastic features and may be unobservable. We propose to use instead the average forward price, which is devoid of seasonality and conveys a more robust representation of the current forward curve level. The second factor in the model is a quantity analogous to the stochastic convenience yield, which accounts for the random changes in the forward curve shape. The well-known cost-of-carry relationship is significantly improved by introducing a deterministic seasonal premium within the convenience yield. We develop model estimation procedures and apply them to a number of energy markets.     

“银期通系统”的设计及实现

“银期通系统”是指期民和期货经纪公司通过银行实现银行卡和期货资金账户之间资金实时划转、存折炒期货的中间业务平台,介绍了该系统的设计、系统结构所需软硬件配置、主要功能模块,并对关键技术前端应答模块、冲正模块等进行了详细说明。     

风险厌恶、失望厌恶和期货套期保值

本文考察失望厌恶对期货套期保值的影响。我们把一个不变的绝对风险厌恶（CARA）效用函数放进Gul（1991）的失望厌恶框架之内。它显示出，一个更厌恶失望的套期保值者会比一个厌恶失望程度较低的套期保值者选择一个更接近于最小方差套期保值的最优期货头寸。当套期保值者厌恶风险的程度较低时，失望厌恶的效应更强。对失望很小程度的厌恶会使一个接近于风险中性的套期保值者持有一个截然不同的头寸。此外，一个更厌恶风险或失望的套期保值者会有一个较低的参考点reference point。数字上的结果显示，厌恶失望的套期保值者的参考点往往会低于传统的厌恶损失的套期保值者的参考点。于是，厌恶失望的套期保值者的行动会更加保守，利用机会牟利的行为会少于传统的厌恶损失的套期保值者。     

上交所与银行间国债市场的新券效应及比较

新券效应与国债品种特征、投资者行为和市场微观结构均有密切关系.上交所和银行间国债市场的新券效应不仅存在共同点,也存在明显差异.在交易额占比最大的基准国债品种上,两个市场均表现出显著的新券效应.但由于投资者行为存在差异,上交所国债市场的新券效应更倾向于中长期国债品种,而银行间国债市场的新券效应更倾向于短期国债品种.而且,上交所国债市场的指令驱动交易方式便于连续交易和信息披露,方便考察新券效应,而银行间国债市场仅能在较短时间内考察新券效应.在上交所国债市场上,中长期国债与国债回购的利差更大,有利于现券回购套利投资,中长期新券吸引套利投资者积极参与,也促进了新券效应.     

海外股指期货与卖空摊雌出时间比较分析

在缺乏股票卖空机制的情况下，能否推出股指朔货？本文着重分析全球主要市场推出股指期货和建立股票卖空机制的时间关系，认为不应夸大股票卖空机制的实际作用，强调股票卖空机制不是推出股指期货的前提条件，并且可以考虑先推出股指期货再建立股票卖空机制。     

The effectiveness of incorporating higher moments in portfolio strategies: evidence from the Chinese commodity futures markets

This paper examines portfolio strategies that incorporate individual and systematic higher-order moments, within a stochastic optimization framework with uncertain mean and covariance. Using weekly, daily, and 30-minute interval data on Chinese commodity futures, we show that incorporating higher moments into portfolio strategies generally leads to better performance. The systematic fourth-order moment, among all systematic moments considered, can lead to the most robust, and a relatively large, improvement in investment performance, while the contribution of individual moments to the improved performance depends on the data horizon. We also find that adding higher moments brings superior performance in more cases for 30-minute-interval data than for other low-frequency data, suggesting that our strategy most likely performs best in 30-minute-rebalancing investments.     

Interday and intraday volatility: Additional evidence from the Shanghai Stock Exchange

After examining both the interday and intraday return volatility of the Shanghai Composite Stock Index, it was found that the open-to-open return variance is consistently greater than the close-to-close variance. Examining the volatility of interday returns and variance ratio tests with five-minute intervals reveals an L-shaped pattern, or more precisely, two L-shaped patterns, starting with a small hump during both the morning and the afternoon sessions, with the morning session having a much higher interday volatility than the afternoon session. This L-shaped interday volatility is supported by the similarly shaped intraday volatility pattern. This result suggests that the high volatility of intraday returns for the market open is not entirely due to the trading mechanisms (call auction in the market opening) but also due to both the accumulated overnight information and the trading halt effect. The five-minute breaks after the auction and blind auction procedures are the two major driving forces which exaggerate the high intraday volatility observed at the market open.

关于中国铝期货市场套期保值绩效的实证研究

套期保值是企业利用期货市场进行风险控制的重要过程。利用金融衍生产品进行风险管理的关键问题是确定套期保值比率。通过对中国沪铝期货套期保值绩效的实证研究发现基于DVECH-GARCH的动态套期保值比基于OLS的静态套期保值避险效果好。选择一定的套保模型进行对冲交易,铝加工企业能够有效地分散铝现货的市场风险,稳定企业生产经营。     

沪市A股2000年财务报告的信息含量

关于财务信息对股票价格的影响,国内外学者进行了大量的实证研究。对沪市2000年年报公布前后有关财务指标与A股股价的相关系数进行了多次全样本分析计算,发现每股收益、每股净值具有明显的信息含量,而每股经营现金净流量基本不具有信息含量,从而揭示了我国财务报告信息的有用性。     

会展业经济拉动效应的实证研究——以上海新国际博览中心为例

会展业作为前景广阔的朝阳产业,对相关产业有巨大的拉动作用.本文以上海新国际博览中心作为案例对会展业的经济效应做实证研究,从抽样调查和统计数据着手分析得出以下结论:上海展览业的拉动效应为1∶8.4,已接近国外发达国家水平;不同展览的经济带动作用各不相同,参观人数多的品牌国际展的经济拉动作用更大;展览会对展览搭建公司以及当地住宿餐饮影响巨大.