Against the background of concerns about the limited supply of fuel in the future due to the introduction of US sanctions against Iran over the past week, Brent crude has risen by 2.4%, WTI - by 2.1%. Analysts also express concerns that Saudi Arabia and Russia will be able to increase oil production in time to compensate for the reduction in deliveries from Iran. All these expectations gave grounds for experts to predict that Brent oil could reach $100 per barrel in the fourth quarter of 2018 or the first quarter of next year. On Friday, Brent crude rose 15 cents to 84 dollars 73 cents a barrel. The price of WTI rose 44 cents to 74 dollars 57 cents per barrel.