The rise in international oil prices is accelerating as U.S. President Donald Trump declared a complete blockade of ships traveling between Iranian ports and the coast in the Strait of Hormuz. On the 13th (local time), the price of U.S. West Texas Intermediate (WTI) crude oil (WTI) futures for August delivery on the New York Mercantile Exchange was trading at $78.0 per barrel, up 9.23% from the previous day as of 5:29 p.m. Eastern time. At the same time, the price of Brent crude oil futures for September delivery on London's ICE Futures Exchange also rose 9% to $83.15 per barrel. This surge in oil prices is due to President Trump's strong maritime pressure card in a situation where the military conflict between the United States and Iran has reignited. In particular, with President Trump's policy of resuming the maritime blockade against Iran, he imposed a 'security toll' of 20% of the shipment value on all cargo passing through the Strait of Hormuz. As they announced that they would collect in the name of money, concerns about disruptions in global crude oil transportation hit the market, causing oil prices to rise sharply.