Growing worries about the U.S. tariff wars sent crude oil prices falling on Friday. Oklahoma energy stocks finished the week with a poor day in trading as one firm plunged 27%.
However, both WTI and Brent were still able to make gains for a third consecutive week, largely because of new pressure by the Trump administration on Iran and Venezuela.
West Texas Intermediate crude dropped 56 cents or 0.8% to close at $69.36 a barrel on the New York Mercantile Exchange.
Global benchmark Brent crude slid 40 cents or 0.5% to $73.63 a barrel.
Natural gas finished on Friday with a 14 cent or 3.57% gain to settle at $4.07 per MMBtu.
Oklahoma energy stocks also took a tumble on Friday, including a whopping 27% plunge for Stardust Power, the lithium mining group with an operation in Muskogee. Mammoth Energy slumped 7%, LSB Industries fell 6% and Empire Petroleum dropped 5%.