Oil prices ended last week with growth based on concerns about fuel supplies to the world market. However, on Friday evening, oil prices fell. July futures for Brent crude by 18:14 Moscow time on Friday fell by 6 cents to 79 dollars 25 cents per barrel. Prices for June WTI futures fell by 17 cents to 71 dollars 32 cents per barrel. Over the past week, Brent has risen in price by 2.9%, WTI - by 1%. The growth of the oil market was caused by concerns over the reduction of oil exports from Iran after the introduction of US sanctions against it and the likely increase in production by the OPEC countries. Investors also closely monitor the falling oil production in Venezuela.