Brent Closes at $87.69 After Houthi Drone Strike on Saudi Refinery Compounds the Hormuz Closure

Brent crude settled at $87.69 a barrel on Monday, up 4.95 percent, its fourth consecutive gain and its highest close in almost two weeks. The move went well beyond the earlier session's advance of about 0.75 percent. Traders were pricing two separate threats at once: the continuing closure of the Strait of Hormuz, which normally carries roughly a fifth of the world's seaborne oil, and a drone attack on a Saudi refinery that sits outside the strait entirely.

Yemen's Houthi movement said it struck Saudi Aramco's Jazan refinery with a drone early Sunday, causing a fire that Saudi authorities said was extinguished with no injuries. The Houthis said the attack answered Saudi drone flights over Saada and Hajjah provinces. The plant processes 400,000 barrels of crude a day and matters to the market because it lets Aramco ship refined products out through the Red Sea without passing through Hormuz. Aramco's chief executive, Amin Nasser, said recent attacks on company facilities had interrupted some production but had no material operational or financial effect.

Two days earlier, the United Arab Emirates accused Iran of hitting a tanker linked to Abu Dhabi National Oil Company (ADNOC) with a missile inside the strait. No one was killed. ADNOC said the vessel was the sixteenth of its ships attacked since the war began on February 28, and that fifteen had been struck by missiles or drones in transit, killing one crew member and injuring twenty. Iran has not accepted responsibility. The Islamic Revolutionary Guard Corps (IRGC) said any reopening of the strait depends on Washington accepting Tehran's terms, separate from the Oman-brokered negotiations.

Those terms remain the obstacle. Al Jazeera reported that Tehran's published draft would ban United States and Israeli vessels from transit, exclude other states it deems hostile until compensation is paid, and impose a penalty equal to 20 percent of cargo value on ships that do not comply. Iran's broader demands include an end to American strikes, the lifting of the blockade on Iranian ports, sanctions relief, the release of frozen assets and payment for war damage. Iran's foreign minister, Abbas Araghchi, said the two governments are not holding direct talks and will not do so while Washington continues to violate the interim agreement signed in June. He said messages pass through intermediaries instead. American officials had said earlier that an agreement was close.

Diplomacy on the wider conflict has also stalled. The Israeli financial daily Globes reported that Prime Minister Benjamin Netanyahu rejected a fifteen-point plan put forward by the international peace council. A Lebanese diplomatic source said separately that no talks between Lebanon and Israel are planned soon.

The buffer is thinning. Crude held in the United States Strategic Petroleum Reserve has fallen below 300 million barrels, the lowest level since 1983, which leaves Washington less able to cap prices by selling into the market. For central banks, an energy supply shock is a change in relative prices that interest rates cannot reverse. Policymakers can only accommodate it or resist it, not offset it.