ReutersOil tumbles on Iran, Libya; worry about high supply returnsReutersU.S. crude futures also fell but only slightly, supported by data suggesting a smaller-than-expected build last week in the Cushing, Oklahoma delivery point for oil. Players were also …

ReutersBrent down 4 percent on Iran, Libya; US crude up on spread playReutersAnalysts say Iran could increase its oil sales fairly quickly if sanctions were lifted and may eventually be able to raise exports by up to 1 million barrels per day (bpd). A Reut …