Within the initial two weeks of the invasion, prices in global oil markets had surged by US$8 per barrel,[1] pushing prices for Brent oil above $100 a barrel for the first time since 2014.[108] On 27 February, BP, one of the world's seven largest oil and gas companies and the single largest foreign investor in Russia, announced it was divesting its 19.75% stake in Rosneft.[109] The Rosneft interest comprises about half of BP's oil and gas reserves and a third of its production. The divestment may cost the company up to $25 billion and analysts noted that it was unlikely that BP would be able to recover a fraction of this cost.[110] The same day, the Government Pension Fund of Norway, the world's largest sovereign wealth fund, announced that it would freeze investment in Russia and divest its Russian assets. Before the invasion, the fund owned about 25 billion Norwegian krone ($2.83 billion) in Russian company shares and government bonds.[111]