Chokepoint Data · the Strait of Hormuz crisis

Iran declares Strait of Hormuz closed until further notice

2026-07-12 · policy · major

Hours after the IRGC struck the container ship GFS Galaxy (22:40 UTC on 11 July; engine-room fire, crew abandoned ship, one crew member missing and later confirmed dead), Iran declared the Strait of Hormuz closed until further notice, its first formal closure declaration of the conflict. US wire datelines (Bloomberg, Axios) read 11 July (US evening); in UTC the declaration came around or shortly after midnight into 12 July. Either way it landed on a weekend, after markets had closed for the week.

Brent next close +9.8% · +7 days +14.4% · transits 13.6 → 4.7 per day · outsized reaction — bigger than 98.9% of pre-crisis days

Attribution caveat: 3 other major event(s) sit inside this one's ±7-day window (2026-07-07 Iran strikes three commercial ships in Hormuz; Qatari LNG tanker ablaze; 2026-07-08 Trump declares ceasefire with Iran over; new wave of US strikes; 2026-07-14 US naval blockade of all Iranian ports takes effect), so the reaction is not cleanly separable.

Sources

Bloomberg · Axios · Lloyd's List

See this event on the annotated timeline →

Computed, not asserted — every number here is derived from public data: official EIA Brent closes via FRED, IMF PortWatch transit counts, Polymarket and Kalshi odds, and source-linked curated events. Method and caveats · Atom feed · llms.txt

https://chokepointdata.com/event/2026-07-12-iran-declares-strait-of-hormuz-closed-until-further-notice/