CNBC | Oil settles lower after 2-day rally CNBC Government officials earlier told Reuters a one-month ceasefire had been agreed last week following talks between the oil minister, community groups and state governors in the Niger Delta, the source of most of Nigeria's crude oil. The denial came in a ... Oil Prices Fall on Supply Overhang, 'Brexit' Uncertainty Oil down 2 percent on Brexit profit-taking, pares losses on Nigeria Oil futures buckle amid Brexit uncertainty |