Telegraph.co.uk | FTSE 100 falls as sentiment sours after oil tanks on failed Doha talks Telegraph.co.uk The Russian rouble has tumbled by more than 2% against the dollar to 67.79 after oil prices following a meeting of major oil producers in Doha. Last week, the rouble had tracked oil higher as the market anticipated an output freeze would be agreed ... Why Doha no-deal is actually great for oil prices Oil wobbles after Opec fails to agree output freeze - business live Oil bulls will be the losers as technology upends demand |