When the economy slows down, the price of oil tends to fall. But this time, OPEC+ is increasing production despite weak demand.

Oil prices slid Friday to their lowest levels in nearly four years. A plan to increase supply by the Organization of the Petroleum Exporting Countries and its allies added to fears that tariffs will plunge the global economy into recession.

Oil prices dropped to their lowest in more than four years in early trade on Wednesday on looming demand concerns fuelled by an escalating tariff war between the U.S. and China, the world's two biggest economies,