During the evening trading on Friday, there was a steady increase in oil prices. The price of WTI crude oil for the week decreased due to expectations of growth in supply in the world market amid increasing US reserves and production. Investors, moreover, fear the consequences of increasing tensions between the United States and Saudi Arabia. By 18:05 Moscow time, prices for December futures for Brent oil rose by 1 dollar 16 cents to 80 dollars 45 cents per barrel. The November WTI futures price rose 92 cents to 69 dollars 57 cents a barrel. Goldman Sachs expects that, despite the upcoming introduction of US sanctions against Iran, the oil supply in the market will be quite high due to a faster than expected increase in production in Saudi Arabia.