Make it six straight days of dropping crude oil prices.
On Thursday, prices fell about half-a-dollar on word that President Trump and Russian President Vladimir Putin will meet, possibly in a few days, all in the name of bringing an end to the war between Russia and Ukraine.
The fall in prices came after a 1% drop on Wednesday as Brent and WTI are at their lowest levels in eight weeks.
Global benchmark Brent crude finished down 46 cents or 0.7% at $66.43 a barrel.
West Texas Intermediate, considered the U.S. standard, dropped 47 cents or 0.7% before settling at $63.88 a barrel on the New York Mercantile Exchange.
A majority of Oklahoma energy stocks finished the day with losses including a more than 3% drop for LSB Industries. Despite the majority seeing losses for the day, some firms still recorded significant gains including SandRidge Energy with a nearly 7% jump for the day.