基于VAR模型的石油价格与黄金价格的互动关系

本文基于VAR模型,利用1998-2010年的月度样本数据,对石油价格与黄金价格的关系进行实证研究,确定出变量之间的长期均衡关系,并利用脉冲响应函数分析了黄金价格对自身及石油价格随机干扰项冲击的一个标准差的反应.     

基于VAR模型的石油价格与黄金价格的互动关系

本文基于VAR模型,利用1998-2010年的月度样本数据,对石油价格与黄金价格的关系进行实证研究,确定出变量之间的长期均衡关系,并利用脉冲响应函数分析了黄金价格对自身及石油价格随机干扰项冲击的一个标准差的反应。     

从美元指数、黄金价格与原油价格关系看原油价格体制—微观数据及政策含义

本文以国际原油价格、黄金价格、美元指数为研究对象,运用单位根检验、协整检验、误差修正模型和格兰杰因果关系检验对国际原油价格、黄金价格和美元指数三者之间的联动关系进行实证研究.揭示出原油价格和黄金价格、美元指数之间存在着长期稳定的均衡关系以及黄金价格和美元指数之间不存在着长期均衡关系.     

黄金价格与原油价格关系的实证分析

纵观黄金价格与原油价格的历史走势,发现二者同向运动的趋势很明显,但有些时候也会出现背道而驰的局面。本文收集了1971年1月~2010年4月的黄金价格和原油价格的月度数据,运用Eviews软件对这两组时间序列进行协整检验和格兰杰检验,最后建立了误差修正模型来考察二者之间的长期动态关系,得出了黄金价格和原油价格存在正向联动的关系,并且存在着从原油价格上涨到黄金价格上涨的单向因果关系,这种关系是长期稳定的。     

黄金价格、中国黄金储备与通货膨胀关系研究

文章通过格兰杰因果检验了黄金价格、人民币实际有效汇率、国内货币供应量与通货膨胀的关系。研究认为,黄金是对抗通货膨胀的有效工具,黄金价格上涨、黄金储备增大、国际石油价格和大宗商品价格上浮对通货膨胀有持续的拉动效应;货币供应量与通货膨胀之间存在短期与长期效应不一致的现象。提出密切关注黄金价格、增加国家黄金储备、建立黄金价格预警机制等措施。     

经济转折时期原油价格与黄金价格、美元汇率的联动关系

本文以原油价格、黄金价格、美元汇率为研究对象,运用稳定性检验、协整检验、格兰杰因果关系检验以及VAR模型、误差修正模型,分别对经济转折时期(即次贷危机时期)原油价格与黄金价格和原油价格与美元汇率之间的联动关系进行实证研究.研究结果表明,原油价格与黄金价格之间不存在长期稳定的协整关系,原油价格与美元汇率之间存在长期稳定的协整关系以及双向因果关系.通过VAR模型和误差修正模型的估计,得到原油价格与美元汇率之间具体的联动关系表达式.     

黄金价格影响因素的实证分析

本文为了探究黄金的影响因素,选取2008年1月至2016年12月的月度数据,在平稳性检验、协整检验和相关性检验后,进行多元线性回归,深度发掘影响黄金价格的长期因素,研究发现:黄金价格与通货膨胀、石油价格显著正相关关系,与基准利率显著负相关关系.     

中国经济发展与能源消费、环境关系的实证分析

采用1985～2007年中国能源消费、环境与经济增长的时间序列数据,利用单位根检验、协整分析、误差修正模型和格兰杰因果关系检验方法,对中国经济增长和能源消费、环境之间的关系进行了实证分析。研究结果表明:中国的能源消费、煤炭消费、石油消费、电力消费、工业固体废物产生量均与经济增长之间存在一种长期均衡关系。格兰杰因果关系分析发现,经济增长与能源消费之间存在双向因果关系,经济增长与煤炭消费、电力消费之间只存在单向因果关系,经济增长与石油消费、工业固体废物产生量之间不存在因果关系。     

石油价格对中国股市走势影响的实证研究

本文主要研究世界石油市场和中国股市之间的联动关系,即石油价格的变化如何影响中国股市的走势。我们用计量的方法分别检测原油价格和燃料油价格的收益与上证综指收益之间的相关关系,认为虽然石油价格波动不会即刻引起中国股市的变动,但是如果以石油股上市的时间点作为分隔,石油股股价变动作为中间传导项,我们发现石油价格波动确实是影响中国股市的一个重要因素。     

黄金价格与CPI相关性的实证分析

黄金一直以来被视为对冲通货膨胀的重要工具,两者之间存在着密切联系,通过观察2003年7月至2013年6月的数据发现,黄金价格和通货膨胀走势大体相同,并对黄金价格和通货膨胀的相关性做了实证分析。分析结果表明,CPI和黄金价格之间存在着长期均衡关系,并且两者互为因果、相互引导;在短期内,二者之间的长期均衡关系对黄金价格的调整具有负向引导作用,而对CPI的变动具有正向调整作用。     

Are gold bugs coherent?

We use wavelet models to surface the relationship between gold miners stock prices and the price of gold. We find that there is little relationship in the short run but some significant and long-standing long-run relationships. Gold prices appear to lead gold miner stock prices.     

Cross market predictions for commodity prices

This paper shows that commodity prices can be predicted from cross-market information by establishing long-run cross-market commodity price equilibrium models, which are characterized by a linear relation between prices across different markets. Using data from five representative commodity markets (oil, copper, gold, corn, and cattle) during the period 2005–2018, we demonstrate that oil and industrial metal markets have formed a long-run price equilibrium with other markets across different commodity families. However, agriculture and gold markets do not tend to have long-run price equilibrium relations with other commodity markets. Furthermore, we show that the absence of a price equilibrium is due to the cross-market liquidity interference effect. After we control for the liquidity effect, long-run cross-market commodity price equilibrium relations are reestablished for agriculture and gold markets. These results can aid in demonstrating that liquidity can capture most of the missing information that is not reflected in price dynamics in less liquid markets, such as agriculture and gold markets. Therefore, less liquid commodity price predictions require both prices and liquidity levels from cross-markets, while liquid commodity prices (oil and metal) can be predicted based solely on cross-market prices.     

The long-run relationship of gold and silver and the influence of bubbles and financial crises

This paper analyzes the long-run relationship between gold and silver prices. We closely follow Escribano and Granger (J Forecast 17:81–107, 1998) and extend their study. We use a longer sample period from 1970 to 2011 and study the role of bubbles and financial crises for the relationship between gold and silver prices. We find clear evidence for a co-integration relationship between gold and silver with gold prices driving the relationship. The analysis also indicates that the results are influenced by bubble-like episodes and financial crises.     

Time–frequency relationship between US output with commodity and asset prices

Commodity and asset prices have a well-documented effect on economic growth as manifested through various channels. At the same time, the business cycle influences the commodity and asset prices. Whereas empirical evidence on the effect of commodity and asset prices on the long-run economic growth is ambiguous, most of the previous researches highlight a positive correlation in the short run. The aim of this article is to disentangle the short- and long-run co-movements between US historical business cycles and commodity and asset prices over the period 1859–2013. For this purpose, we use a time–frequency approach and we test the historical influence of oil, gold, housing and stock prices over the output growth. In contrast to other studies, we control for the effect of other prices and monetary conditions, using the wavelet partial coherency. In line with the previous works, we discover that co-movements between economic growth and commodity and assets prices manifest especially in the short run. We also find that stock returns and housing prices have a more powerful effect on the US economic growth rate than the oil and gold prices. The long-run co-movements are documented especially around the World War II. Finally, when controlling for the influence of the interest rate, inflation and other commodity and asset prices, co-movements become weaker in the short run. In general, the oil and housing prices lead the GDP growth, the US output leads the gold prices, while there is no clear causality direction between business cycle and stock prices.     

Natural gas prices and stock prices: Evidence from EU-15 countries

This study investigates the long-run relationship between natural gas prices and stock prices by using the Johansen and Juselius cointegration test and error–correction based Granger causality models for the EU-15 countries. We employ quarterly data covering the period from 1990:1 to 2008:1. Empirical findings suggest that there is a unique long-term equilibrium relationship between natural gas prices, industrial production and stock prices in Austria, Denmark, Finland, Germany and Luxembourg. However, no relationship is found between these variables in the other ten EU-15 countries. Although we detect a significant long-run relationship between stock prices and natural gas prices, Granger causality test results imply an indirect Granger causal relationship between these two variables. In addition, we investigate the Granger causal relationship between stock returns, industrial production growth and natural gas price increase for Austria, Denmark, Finland, Germany and Luxembourg. As a result, increase in natural gas prices seem to impact industrial production growth at the first place. In turn, industrial production growth appears to affect stock returns.     

Is gold a hedge against inflation? New evidence from a nonlinear ARDL approach

This paper aims to study the role of gold as a hedge against inflation based on local monthly gold prices in China, India, Japan, France, the United Kingdom and the United States of America in periods ranging from 1955 to 2015. We extend the literature by using a novel approach with the nonlinear autoregressive distributed lags (NARDL) model (Shin et al., 2014). The main advantage of this model relies on its ability to simultaneously capture the short- and long-run asymmetries through positive and negative partial sum decompositions of changes in the independent variable(s). Moreover, we rely on local gold prices instead of those from London converted into local currencies like in most of previous studies. The results show that gold is not a hedge against inflation in the long run in all cases. In the short run, gold is an inflation hedge only in the UK, USA, and India. Furthermore, there is no long-run equilibrium between gold prices and the CPI in China, India and France. This difference may be due to traditional aspects of gold and custom controls for gold trade in these countries. Our robustness check suggests that the data time-frequency does not change the specification of the NARDL model but can change conclusions regarding the role of gold as a hedge against inflation in certain countries.     

FUEL TAXES AND COINTEGRATION OF ENERGY PRICES

Creating a successful energy tax policy requires understanding the markets that the energy policy targets. This paper analyzes coal, natural gas, and oil markets to determine the extent to which these fuel prices move together. Results indicate that a stable long-run relationship between coal and oil prices existed until 1974 and that this relationship changed after 1974. The long-run relationship between coal, natural gas, and oil prices implies that a single fuel tax in these markets would not be effective as a single tax policy. Similarly, an equal percentage tax on these energy sources, which does not change relative prices initially, would not keep relative prices unchanged in the long run. Energy policy must take account of the long-run relationship between different energy prices. Otherwise, the long-run results of energy policy could be quite different than intended .     

The relationship between stock prices and exchange rates in South Africa and Nigeria: structural breaks analysis

The relationship between stock prices and exchange rates has continued to generate interest from both the academia and financial industry players for many years. This study conducts an empirical investigation into the relationship between stock prices and exchange rates for the two largest economies in Sub-Saharan Africa – South Africa and Nigeria. Our methodology accounts for structural breaks in the data and the long-run relationship between stock and foreign exchange markets. The results of multivariate causality tests with structural breaks showed that causality runs from exchange rates to domestic stock prices in Nigeria (flow channel) while in South Africa, no causality exists between domestic stock prices and exchange rates. The results also reveal that there is causality from the London stock market to both countries’ stock markets, thus showing that international stock markets are driving both the Nigerian and South African stock markets.     

Structural breaks,cointegration and the farm-retail price spread for lamb

This paper examines the farm—retail price spread for lamb from monthly UK data for 1979–1993. Using cointegration, it examines seasonal patterns in producer and retail prices and seeks to identify a long-run relationship between them. Results show that a long-run relationship exists, and that the direction of Granger-causality is from retail to producer prices. Lamb prices are therefore set in the retail market. Results also show that there is a structural break in the relationship in January 1990 when the price increases; this coincides exactly with a change in policy.     

人民币汇率与股价动态相关性的研究——基于次贷危机前后的比较分析

本文基于2005年8月至2010年6月的月度数据,利用协整检验和向量误差修正模型研究了次贷危机发生前后人民币名义有效汇率与股票价格之间的联动关系。实证结果表明,次贷危机发生前中国股市与汇率之间存在正向的长期均衡关系,且两者之间在长期互为因果关系;在次贷危机发生后两者之间则是反向的长期均衡关系,股价波动在长期内是人民币名义有效汇率变动的单向Granger原因。最后本文基于人民币名义有效汇率的计算方法及其影响因素,利用资产组合平衡模型、国际贸易等相关理论对实证结果进行了分析。