March 6 (Reuters) - Argentina's national oil company YPF swung to a net loss of $1.86 billion in the fourth quarter, the firm said on Wednesday, driven largely by weaker sales and a hefty impairment charge.
Revenues fell 9.7% to $4.194 billion from $4.645 billion in the October-to-December period in 2022, it said in a statement, despite the steady production increase from western Argentina's massive Vaca Muerta shale formation, one of the biggest in the world.
The company, one of Argentina's top domestic sellers of refined fuels, took a $1.782 billion impairment charge to pay for the deterioration of assets, it said. (Reporting by Brendan O'Boyle; Editing by Valentine Hilaire and Richard Chang)
