 Time Series Analysis of Persistence in Crude Oil Price Volatility across Bull and Bear RegimesLuis Gil-Alana, Rangan Gupta, Olusanya Olubusoye and Olaoluwa Yaya No 201580, Working Papers from University of Pretoria, Department of Economics Abstract: This paper deals with the analysis of crude oil prices in the context of fractional integration and using bull and bear phases over the monthly period of September, 1859 to July, 2015. We examine both the log prices series as well as volatility, approximated by means of the absolute and the squared returns. The results for the whole sample indicate that the log-prices are nonstationary, with an order of integration close to 1 or even higher than 1, while the squared and absolute returns show evidence of long memory behavior. Upon separating the sample according to bull and bear periods, we observe an increase in the order of integration in both the log-prices and the two measures of volatility. Our results have important policy implications. Keywords: Bull and bear regimes; Oil price; Persistence; Volatility; West Texas Intermediate market (search for similar items in EconPapers) There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it. Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:pre:wpaper:201580 Access Statistics for this paper More papers in Working Papers from University of Pretoria, Department of Economics Contact information at EDIRC. |
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