文章基本信息

标题：Speculation and Volatility Spillover in the Crude Oil and Agricultural Commodity Markets: A Bayesian Analysis
本地全文：下载
作者：Du, Xiaodong ; Yu, Cindy L. ; Hayes, Dermot J. 等
期刊名称：Journal of Agribusiness
印刷版ISSN：0738-8950
出版年度：2009
期号：suppl
出版社：Journal of Agribusiness
摘要：This paper assesses the roles of various factors influencing the volatility of crude oil prices and the possible linkage between this volatility and agricultural commodity markets. Stochastic volatility models are applied to weekly crude oil, corn and wheat futures prices from November 1998 to January 2009. Model parameters are estimated using Bayesian Markov chain Monte Carlo methods. The main results are as follows. Speculation, scalping, and petroleum inventories are found to be important in explaining oil price variation. Several properties of crude oil price dynamics are established including mean-reversion, a negative correlation between price and volatility, volatility clustering, and infrequent compound Poisson jumps. We find evidence of volatility spillover among crude oil, corn and wheat markets after the fall of 2006. This could be largely explained by tightened interdependence between these markets induced by ethanol production.
关键词：Gibbs sampling;Merton jump;leverage effect;stochastic volatility