Saudi Arabia raised oil prices for buyers in Asia and the US, days after Opec and its allies made a surprise decision to increase output.

       The move signals that the world’s biggest crude exporter still sees strong demand in its two main markets, despite the spread of the omicron variant of the coronavirus.

       State producer Saudi Aramco increased January’s prices for all crude grades that will be shipped to Asia and to the US. The company raised the key Arab Light grade for customers in Asia by 60 cents from December to $3.30 a barrel above a benchmark.

       Aramco had been expected to raise pricing for the long-term Arab Light contracts by 70 cents a barrel, according to a survey on Friday of six traders and refiners in Asia.

       Opec+, led by the Saudis and Russia, opted on Thursday to proceed with a supply increase next month, even as new Covid-19 cases threaten to sap demand. Opec+ said it could change plans at short notice if the market worsens.