CNBC | US oil ends April with nearly 20 pct monthly gain CNBC U.S. oil prices dipped on Friday after an early rise to 2016 peaks, but posted a gain of about 20 percent for April, the largest monthly gain in a year. Futures held losses after oilfield services firm Baker Hughes reported its weekly U.S. oil rig ... Oil on track for biggest monthly gain in seven years Oil Falls From Day's High, Back Below $46 Oil dips, still near 2016 peaks on big April gain |