Chokepoint Data · the Strait of Hormuz crisis

US naval blockade of all Iranian ports takes effect

2026-07-14 20:00 UTC · military · major

The US naval blockade of all Iranian ports and coastal areas took effect at 20:00 UTC on 14 July (4pm ET; midnight 15 July Gulf time), interdicting all vessels bound for or departing Iranian ports while permitting neutral transit of the strait to non-Iranian destinations. CENTCOM had announced the blockade a day earlier, on 13 July. More than 20 US warships were reported operating in the region to enforce it.

Brent next close +2.5% · +7 days +15.0% · transits 8.9 → 4.3 per day · reaction near an ordinary day (77.9th percentile)

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; 2026-07-12 Iran declares Strait of Hormuz closed until further notice), so the reaction is not cleanly separable.

Sources

CNN · Axios · Gulf News · Wikipedia (2026 United States naval blockade of Iran)

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/2026-07-14-us-naval-blockade-of-all-iranian-ports-takes-effect/