| ID | 092570 |
| Title Proper | Efficiency of the crude oil markets |
| Other Title Information | evidence from variance ratio tests |
| Language | ENG |
| Author | Charles, Amelie ; Darne, Olivier |
| Publication | 2009. |
| Summary / Abstract (Note) | This study examines the random walk hypothesis for the crude oil markets, using daily data over the period 1982-2008. The weak-form efficient market hypothesis for two crude oil markets (UK Brent and US West Texas Intermediate) is tested with non-parametric variance ratio tests developed by [Wright J.H., 2000. Alternative variance-ratio tests using ranks and signs. Journal of Business and Economic Statistics, 18, 1-9] and [Belaire-Franch J. and Contreras D., 2004. Ranks and signs-based multiple variance ratio tests. Working paper, Department of Economic Analysis, University of Valencia] as well as the wild-bootstrap variance ratio tests suggested by [Kim, J.H., 2006. Wild bootstrapping variance ratio tests. Economics Letters, 92, 38-43]. We find that the Brent crude oil market is weak-form efficiency while the WTI crude oil market seems to be inefficiency on the 1994-2008 sub-period, suggesting that the deregulation have not improved the efficiency on the WTI crude oil market in the sense of making returns less predictable. |
| `In' analytical Note | Energy Policy Vol. 37, No. 11; Nov 2009: p.4267-4272 |
| Journal Source | Energy Policy Vol. 37, No. 11; Nov 2009: p.4267-4272 |
| Key Words | Crude Oil Markets ; Market Efficiency ; Variance Ratio Test |