Chokepoint Data · the Strait of Hormuz crisis

Iran's military declares Hormuz closed again, citing Israeli MOU breaches

2026-06-20 · policy · major

Iran's IRGC-led military command declared the strait closed to all vessel traffic, citing continued Israeli strikes in southern Lebanon as a 'blatant breach' of the MOU; Iran's foreign ministry contradicted the declaration within hours, saying shipping was operating normally, while US officials said transits were continuing via the southern route and analysts assessed the move as strategic messaging rather than an operational closure. Declaration came on a Saturday, with the first US trading response on Monday June 22.

Brent next close -4.9% · +7 days -12.8% · transits 6.7 → 23.4 per day · reaction near an ordinary day (94.7th percentile)

Attribution caveat: 2 other major event(s) sit inside this one's ±7-day window (2026-06-14 US and Iran reach framework deal to end war and reopen Hormuz; 2026-06-17 Trump and Pezeshkian sign Islamabad Memorandum ending war and blockades), so the reaction is not cleanly separable.

Sources

CNBC · Wikipedia (2026 Strait of Hormuz crisis) · JMIC Advisory 010-26 (IMO)

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/2026-06-20-iran-s-military-declares-hormuz-closed-again-citing-israeli-/