基于时变混合 Copula 模型的配对交易策略

由于金融时间序列数据通常具有动态时变、非对称和非线性相关特征,本文给出了一类权重系数和Copula参数均时变的混合Copula模型。同时基于权重系数和Copu－la参数时变的混合Copula模型,刻画不同频率互联网金融概念股价格序列之间的相关性,构建配对交易策略模型,并与静态混合Copula模型下的策略结果进行比较。实证分析表明：基于时变混合Copula模型的配对交易策略可以获得较高收益; Copula 参数和权重系数均时变的混合Copula模型能捕获更多交易机会,策略表现最好;含有较多成分Copula的混合模型在配对交易策略中并不具有优势;高频率金融市场比相应低频率金融市场的策略盈利更高。     

基于AV模型的利率影响股市极差波动率的研究

根据Parkinson的公式计算得到极差波动,结合Hsieh提出的AV模型,通过对利率和价格极差之间的推导,指出了利率和波动率之间的内在联系,并提出了利率影响股市极差波动的模型。实证结果表明,利率对波动率的影响系数大约等于波动率滞后项系数的减小之和,利率变量的引入在很大程度上解释了极差波动率的持续性。     

农产品价格与通货膨胀率动态关系探讨

根据2002年～2009年的相关数据,对农产品价格波动与通货膨胀率波动的动态进行分析表明,农产品价格与通货膨胀率之间总体变化趋势一致,短期存在着波动性的相互影响,长期两者协整且呈显著的正相关性,同时,两者存在双向"溢出效应".为此,建议保持农产品价格的合理与基本稳定,调动农民生产积极性,以实现抑制通货膨胀的目的.     

GARCH和Copula模型在股市中的实证比较

长期以来资产收益率的波动性一直都是金融学家关注的问题,资产选择理论用方差来描述收益率的波动性,进而寻找最优资产组合。传统的金融计量方法认为方差是独立于时间变化的变量,但是近年来大量的金融时间序列实证分析发现,方差是随时间变化而变化的,而且金融时间序列的波动具有类聚性。近年来,一些学者把GARCH模型与Copula结合,动态地对金融变量间的相依性和风险加以研究。本文将结合两者的实证分析进行比较。     

农产品价格波动的季节性特征研究——基于对我国猪肉市场价格波动的分析

近期农产品价格波动较为频繁,影响着居民的基本生活需求。本文运用Census-X12方法,以猪肉价格为例,证实了农产品市场价格季节性波动的客观性;以此为基础,通过建立误差修正模型(ECM),定量分析了季节性因素对农产品市场价格的影响程度,由此提出应对和预防农产品价格波动的对策建议。     

陕西省生猪及猪肉价格波动与政策调控效果实证研究

平抑生猪以及猪肉价格波动并采取措施进行反周期调节是陕西省乃至全国宏观价格调控的一项重要内容。为了进一步完善生猪及猪肉价格调控机制,对陕西省生猪及猪肉价格波动进行了量化分析,通过将价格调控因素引入计量模型剖析了政府调控因素效果,试图为陕西省未来调控猪肉以及农产品价格提供借鉴和参考。     

基于Copula函数的上证综指量价关系

资产价格与成交量间存在同时存在线性和非线性的相关关系。本文对线性相关关系,运用VAR模型,建立上证指数和成交量间稳定的线性模型,研究了上证指数与成交量间的格兰杰因果关系,并对上证指数对数收益率和成交量对数变化率之间的线性关系给出定量分析结果。对于二者之间的非线性、非对称关系,先根据核密度估计模拟出VAR模型中对数收益率和成交量对数变化率的残差分布函数,再利用Copula研究了两者之间的相依强度以及相依结构,定量描述了上海股市量增价升现象并对其成因进行了分析。     

基于GARCH模型的煤炭价格波动规律研究

为了研究煤炭价格波动规律,以秦皇岛大同优混煤2003年3月～2017年5月现货价格为实证研究对象,分别采用普通最小二乘法和GARCH模型对煤炭价格时间序列进行拟合.实证结果表明:煤炭价格时间序列表现出随机波动趋势,GARCH(1,1)模型拟合效果优于最小二乘法;外部冲击会加剧煤炭价格波动,煤炭价格时间序列具备长期记忆性;波动率序列具备ARCH效应,ARCH项系数和GARCH项系数之和略大于1,说明煤炭价格波动的持续性较强.     

基于ARCH类模型的我国猪肉和玉米市场价格波动研究

农业是立国的根本,准确掌握重要农产品的价格波动特征有利于采取相应政策以稳定价格。本文在ARCH模型的基础上,又利用GARCH、GARCH-M、TARCH等ARCH类模型对猪肉、玉米价格的波动、波动的非对称性以及溢出效应进行分析,表明:玉米价格波动具有显著的集簇性,相比之下,猪肉价格波动的集簇性不是很显著;猪肉市场存在高风险高回报的特征,而玉米市场则没有该特征;猪肉价格波动和玉米价格波动具有非对称性,且在玉米市场中该特征更加显著;玉米价格波动会导致猪肉价格波动,但反之关系不成立。     

我国猪肉价格周期波动的实证分析

本文运用X12季节调整和H-P滤波法对我国猪肉价格序列和CRB现货家畜指数进行分解,以此反映猪肉价格和CRB现货家畜指数的波动周期特点。最后通过政策前后比较,研究猪肉价格短期波动的差异变化。研究结果表明,我国在2007年7月以后实行的生猪调控政策并没有缓解猪肉价格的周期波动幅度、波动率及短期波动,通过政策前后的比较及与国外价格指数比较发现,无论价格周期波动、波动率还是短期波动指标都有波动明显加剧的迹象。根据以上结论,本文提出相关的政策建议。     

Universal Coverage, Pinpoint Illustration and Profound Impact HTC 2008 Intermedia Recommendation and Introduction Meeting

Holding 88 percent of train media resources across China, based on "Time Cube", on the 2008 Intermedia Recommendation and Introduction Meeting on December 19, 2007, HTC announced its high-profile strategy of tour marketing and tapping the immeasurable potentials on the train. Meanwhile, HTC officially launched its brand new product Olympic Train on the meeting, providing a fabulous platform for all the brands that are prepared to do a smart marketing on the occasion of 2008 Olympic Games.     

Market presence in China strengthened Network growth and Dual-Chinese-Hub Strategy More frequet Flyer Benefit——Air China and shanhai Airlines Join Star Alliance

In the end of 2007, Air China Limited (hereinafter "Air China") and Shanghai Airlines, formally joined Star Alliance at a ceremony held in the new Terminal Three at Beijing Capital International Airport. With the addition of the two Chinese airlines, Star Alliance now has 19 member carriers operating 17,000 daily flights to 897 destinations in 160 countries.     

Brown＇s Blossom in Britain-China

The overall strategic relationship between U.K. and China is ＂better than ever＂, China- Britain relations have maintained good momentum, with increased high-level exchanges and the reinforcement of strategic mutual trust, with more room for growth in the future.     

Challenge and Opportunity Go Hand in Hand——What Global Economic Agitation Brings to the China's Economy?

Domino effects of the global finance agitation As the origin of the subprime crisis,US financial institutions lost USS45 billion last year,accounted for over half of the total US,EU & Japan loss.Since January 15th,Chtigroup released its financial statement of the 4th quarter,showing a net deficit of USS9.83 billion,which marked the hisoric high of its quarterly deficit.     

Sinosteel：Extraordinary Moves in Industry Chess

Among the Fortune 500 firms,more and more images from China emerge out.On the 2008 list,Sinosteel Corporation,a landmark group of China industries quietly squeezes into the candidate line.As the largest steel service ＆ trade enterprise,its sales reached at RMB 111.24 billion,with a year-on-year increase of 83.03 percent,and the profit grew by 180.03 percent.On the Sinosteel 2008 Work Meeting,the president Huang Tianwen uttered,＂In the coming year,we will work for US$20 billion sales,and look forward to getting a position in Fortune 500 firms for ourselves.＂     

Walk Through Unusual Five Years—— An Exhibitor＇s Canton Fair Course

When the 103rd Canton Fair is approaching, an old friend of Canton Fair, Li Ying from Jiangsu prov-ince recollected his past five years＇ experiences to the grand trade meeting. Each year is special, with some unforgettable memories colored by the year.     

A World of Love 2008 Music Grand Ceremony

Under the guidance of the theme slogan of the 29th Olympic Games - One World One Dream, with dream, love and dedication as its theme, the 2008 Music Grand Ceremony ＆ 1000 People Charity Concert on 100 days cotmtdown to Paralympic Gamesis officiaily launched on December 22, 2007. The 2008 Music Grand Ceremony is sponsored by China Disabled Persons＇ Federation, and co-hosted by National Paralympic Committee of China,     

China''''s National Oil Reserve Center was Born

Aseries of events that occurred in October 2007, are rewriting the history of China's energy industry: November 3 an Energy Law Committee asked the public for suggestions on improvements; forty top experts came together to form the National Energy Expert Advisory Committee on November 6; and the National Oil Reserve Center (NORC)became the nerve centre of oil reserves on November 18. Yet, behind the progress of these recent activities remains the fact that international oil prices still hover around a very high price of US$ 90/barrel, and China's oil imports are close to accounting for half of its total oil reserves.     

MUYANG GROUP

With its headquarters in the historic city of Yangzhou,Jiangsu Muyang Group Co.,Ltd has since its founding in 1967 grown into a well-known group corporation whose activities cover research ＆ development,project design,manufacturing,installation and services in a multitude of industries including feed machinery and engineering,storage engineering,grain machinery and engineering,environmental protection,conveying equipment and automatic control systems.     

2007 China Harbor Ten People

2007 China Harbor Ten People elected the entrepreneurs who contributed a lot to port economy and enterprises this year trough their talent management.These ten people embody their social responsibility,professional skills,creative ability,and charming personality.Bearing full confidence in China＇s port economy,the port entrepreneurs are brave enough to explore a brand new area,so as to promote harbor economic development. At the very beginning of 2008,China Shipping Website,Dalian Maritime University,and China Port and Shipping In- stitute jointly select the 2007 China Harbor Ten People,demonstrate port entrepreneurs＇ stunning minds,disclose their secrets to success,and providing abundant experiences to others in harbor development.The top ten people are various excellence during the ups and downs harbor development.