U.S. Navy blockade slashes Iran oil exports as Trump shifts to economic warfare

Key Points:

• Iranian crude oil exports have dropped over 80% in August, down to about 260,000 barrels per day from 1.7 million bpd in August 2025, due to a U.S. naval blockade aimed at pressuring Tehran to reopen the Strait of Hormuz.
• The U.S. military has enforced the blockade by redirecting 75 commercial ships, disabling three vessels, and boarding two, while Treasury Secretary Scott Bessent announced "Operation Economic Outcast" to isolate Iran economically.
• Despite the blockade and sanctions, Iran remains defiant, negotiating with Oman to share control of the strait and rejecting U.S. demands, even as two tankers were attacked recently near Hormuz and Oman.
• Oil transit volumes through the Strait of Hormuz have decreased significantly from pre-war levels of 15 million bpd to between 5 and 6 million bpd, with allied Gulf nations using a southern corridor to bypass Iranian pressure, reducing Tehran's leverage.
• The Trump administration believes sustained economic pressure and the blockade will eventually force Iran to capitulate, as Iran's crude storage capacity nears limits and export revenues shrink drastically.