US Central Command (CENTCOM) reimposed a naval blockade on all vessels "to and from Iranian ports and coastal areas" at 20:00 GMT on Tuesday 14 July1, two days after it had told traffic the Strait of Hormuz stayed open. The chokepoint carries about a fifth of the world's seaborne oil, and Washington answered Iran's own closure declaration by enforcing the closure itself rather than keeping the lane open.
The oil market read the difference at once. Brent Crude, the global benchmark, touched $87 a barrel intraday, its highest since June, before closing up 1.7% at $84.322. Prices had actually slipped to about $75.80 after Iran merely declared Hormuz shut on 12 July; traders treated that announcement as noise and moved only once the United States enforced closure by force.
Enforcement showed in the traffic count too. Hormuz crossings fell to their lowest in two months, with one maritime-data reading cited by RT Arabic putting a single day at six vessels3, against the roughly 35 tankers that cleared the strait at pre-war range on 2 July. The corridor now answers to a blockade order rather than the 9 July memorandum under which Iran and Oman had agreed to jointly manage its shipping.
One caveat belongs here. the strait has swung open and shut for months, through an April blockade, a June memorandum lifting it, and now this re-closure, so this could be oscillation number five rather than a threshold crossed. What sets it apart is that price, insurers and the casualty list all moved together, which no earlier swing produced, and whether the blockade holds past a week is the test that settles which reading is right.
