# Iran Declares Strait of Hormuz Closed as United States Launches Third Round of Strikes

Brent crude held near $76 a barrel, up about 5 percent on the week, after Iran's Revolutionary Guard struck a container ship and fired on Qatar, the United Arab Emirates and Bahrain.

- Published: 2026-07-12T05:12:09.560Z
- Canonical: https://polylog.news/2026-07-12/iran-declares-strait-of-hormuz-closed-as-united-states-launc
- Publisher: Polylog (Global desk)
- Section: markets
- Sources: [Financial Times](https://www.ft.com/content/6b6c23e9-f24e-4c3e-bb1a-e5cb6860008d), [Dawn](https://www.dawn.com/news/2014807/us-launches-new-strikes-on-iran-after-container-ship-hit-in-hormuz-irgc-announces-closure-of-vital-strait), [The Hindu](https://www.thehindu.com/news/international/west-asia-war-iran-us-ceasefire-donald-trump-tehran-attacks-strait-of-hormuz-ships-live-updates-july-12-2026/article71212951.ece), [Kommersant](https://www.kommersant.ru/doc/8813480), [Ynet](https://www.ynet.co.il/news/article/hky3hhxegg)

The managed truce between the United States and Iran broke down again overnight. Iran's Islamic Revolutionary Guard Corps (IRGC) said it fired on a commercial vessel that "tried to move through an unauthorized lane" in the Strait of Hormuz and declared the waterway closed "until American intervention in the region stops," according to [Dawn](https://www.dawn.com/news/2014807/us-launches-new-strikes-on-iran-after-container-ship-hit-in-hormuz-irgc-announces-closure-of-vital-strait). The [Financial Times](https://www.ft.com/content/6b6c23e9-f24e-4c3e-bb1a-e5cb6860008d) reported that the ship was hit and that United States Central Command said a crew member was missing.

Washington responded with what it called its third wave of strikes in a week. United States Central Command said it had struck more than 300 targets across Iran since the start of the week, [Russia's Kommersant reported](https://www.kommersant.ru/doc/8813480), with about 140 targets hit overnight. Iranian state media reported explosions in the port cities of Bandar Abbas and Sirik along the strait, [The Hindu's live coverage said](https://www.thehindu.com/news/international/west-asia-war-iran-us-ceasefire-donald-trump-tehran-attacks-strait-of-hormuz-ships-live-updates-july-12-2026/article71212951.ece). United States Defense Secretary Pete Hegseth said Iran "made a bad choice and is now paying," according to [Israel's Ynet](https://www.ynet.co.il/news/article/hky3hhxegg).

Iran retaliated against Gulf states. Ynet reported that six countries, including the mediators Oman and Qatar, have been struck since the fighting resumed, while Saudi Arabia has so far been spared. Euronews journalists in Doha reported two waves of Iranian fire and large explosions, with air defenses active over the United Arab Emirates and Bahrain.

Oil is the channel to markets. Roughly 20 percent of the world's seaborne crude passes through Hormuz, and vessel-tracking data show traffic running well below normal. Brent held near $76 a barrel, up close to 5 to 6 percent on the week and carrying a renewed risk premium, [Al Jazeera and CNBC reporting show](https://www.aljazeera.com/news/2026/7/8/oil-prices-surge-as-us-strikes-iran-reversing-fall-to-pre-war-levels). During the earlier phase of the crisis in March, Brent traded above $100. The sources differ on intent. Tehran presents the closure as a defensive response to American strikes, while Washington describes its bombing as protection for civilian shipping.

## What this means

Every barrel of Gulf crude that cannot clear Hormuz forces buyers toward costlier, longer routes, and the risk premium passes directly into refining margins, freight rates and headline inflation. Energy importers in Asia and Europe are the most exposed, and because higher oil raises inflation expectations, the shock also constrains central banks that would otherwise be cutting rates. The reversible, intermittent nature of this conflict means the premium is unstable rather than permanent, which keeps volatility high for anyone hedging fuel or shipping.

## What to watch

- Whether tanker traffic through Hormuz recovers or stays suppressed in vessel-tracking data, because a sustained halt is what turns a risk premium into a physical supply shortage.
- Whether Saudi Arabia is drawn in, since the one large Gulf producer so far untouched is also the swing barrel markets rely on to offset lost Iranian and blocked Gulf flows.
- Statements from China and India, the largest buyers of Gulf crude, on rerouting or releasing strategic reserves, which would signal how importers plan to absorb the disruption.