BBC News | Oil trading remains volatile on oversupply concerns BBC News Oil prices have been volatile again, hit by continuing oversupply, the strong dollar and weak global demand. Some members of the Opec group of oil producers have called for an emergency meeting to discuss reducing output. Opec president Emmanuel Ibe ... OPEC considering emergency action on oil prices Nigeria Says OPEC May Meet Soon as Oil Even Hurting Saudi Arabia Crude oil prices plunge to fresh 12-year low |