Testing the weak-form efficiency of the WTI crude oil futures market
AbstractWe perform detrending moving average analysis (DMA) and detrended fluctuation analysis (DFA) of the WTI crude oil futures prices (1983-2012) to investigate its efficiency. We further put forward a strict statistical test in the spirit of bootstrapping to verify the weak-form market efficiency hypothesis by employing the DMA (or DFA) exponent as the statistic. We verify the weak-form efficiency of the crude oil futures market when the whole period is considered. When we break the whole series into three sub-series separated by the outbreaks of the Gulf War and the Iraq War, our statistical tests uncover that only the Gulf War has the impact of reducing the efficiency of the crude oil market. If we split the whole time series into two sub-series based on the signing date of the North American Free Trade Agreement, we find that the market is inefficient in the sub-periods during which the Gulf War broke out. We also perform the same analysis on short time series in moving windows and find that the market is inefficient only when some turbulent events occur, such as the oil price crash in 1985, the Gulf war, and the oil price crash in 2008. Our analysis may offer a new understanding of the efficiency of the crude oil futures market and shed new lights on the investigation of the efficiency in other financial markets.
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
Bibliographic InfoPaper provided by arXiv.org in its series Papers with number 1211.4686.
Date of creation: Nov 2012
Date of revision:
Contact details of provider:
Web page: http://arxiv.org/
This paper has been announced in the following NEP Reports:
- NEP-ALL-2012-12-06 (All new papers)
- NEP-ENE-2012-12-06 (Energy Economics)
- NEP-FMK-2012-12-06 (Financial Markets)
You can help add them by filling out this form.
reading list or among the top items on IDEAS.Access and download statisticsgeneral information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (arXiv administrators).
If references are entirely missing, you can add them using this form.