Global crude oil prices posted their steepest weekly losses since March, after another partial lifting of Russia's fuel export ban compounded demand fears due to macroeconomic headwinds. So, the Brent crude oil futures ended the week at 84.58 dollars per barrel, tanking 11 percent during the week. The US crude futures closed the week at 82.79 dollars a barrel slumping 8 percent, in the past week.