The war premium is back in the oil market, pushing prices higher after the Biden administration reportedly gave Ukraine the green light to use U.S.-manufactured long-range missiles to strike Russian territory. Reuters reported the news on Sunday citing unnamed sources from the Biden administration, with the sources also saying that the government in Kiyv planned to take advantage of the decision in the next few days. Russia has warned repeatedly that such a move by Washington would constitute a significant escalation in the war. “Biden allowing…