Iran declared the strait of Hormuz 'completely open' at 05:00 GMT on 17 April; Trump said the US blockade would remain in full force; Iran's joint military command reimposed restrictions within 24 hours citing US 'breaches of trust'; IRGC gunboats fired on an Indian-flagged super tanker on 18 April; the Celestyal Discovery was the sole vessel to transit the open window; Kpler and Windward recorded transits falling from 15 on 15 April to 8 on 17 April; Brent Crude fell 9.07% to $90.38 on the opening announcement and reversed almost completely when the strait closed again.
The opening lasted less than a trading session and priced Brent on a press conference rather than on physical passage.
