Reuters | Battered oil fights back, sterling hit as May's poll lead shrinks Reuters European stock markets opened down as turbulence in oil markets following Thursday's OPEC meeting, at which oil producers extended existing output cuts but did not expand them, undermined sentiment towards risk assets in general. Asian shares also fell. Oil prices extend declines in Asia after Opec deal Oil Spill: Oil Sells Heavy With A Lot More Downside Oil price tumbles after Opec deal; UK growth unexpectedly downgraded - as it happened |