FTSE 100 slides as Iran‑US standoff over Hormuz fuels oil surge

FTSE 100 opened lower on Wednesday as oil prices broke the $89‑per‑barrel mark, extending a six‑day rally in crude. The move follows a sharp escalation in rhetoric between Iran and the United States over control of the Strait of Hormuz, a key artery for global oil shipments.

Market reaction

Energy‑heavy shares led the decline, with investors pricing in the risk of a prolonged disruption to one of the world’s busiest shipping lanes. Higher oil costs are expected to feed through to inflation calculations and corporate profit forecasts, adding pressure to the broader UK market.

Geopolitical backdrop

On social media, Mohsen Rezaee, the newly appointed secretary of Iran’s Supreme National Security Council, warned that the waterway will stay shut until the United States ends its military involvement, releases frozen Iranian assets and backs a region‑wide ceasefire covering Lebanon and Gaza.

The Strait of Hormuz will not reopen until the US ends the war and blockade, releases Iran’s frozen assets, and agrees to a region‑wide ceasefire, including in Lebanon and Gaza.

Donald Trump dismissed the six conditions set by Tehran, calling them “payment in full” for war damage. He added that the United States is now demanding compensation from Iran.

It is an interesting idea because now I am likewise demanding compensation from Iran.

Trump also said the United States is only “semi‑negotiating” with Tehran. Meanwhile, the defence ministry of Pakistan, which has been acting as a back‑channel, said recent signals suggest a peace arrangement could be forming.

Analysts note that any de‑escalation could quickly reverse the oil rally, while a prolonged standoff would keep energy prices elevated and could weigh on consumer‑facing sectors.

Investors will be watching for official statements from Washington and Tehran, as well as any diplomatic overtures from regional intermediaries, to gauge whether the market’s current trajectory will hold or reverse.