CNBC: Shipping Stalls After Iran Declares Strait Closed Again

Date: June 22, 2026
Authors: Anniek Bao and Spencer Kimball, CNBC
URL: https://www.cnbc.com/2026/06/22/strait-of-hormuz-iran-us-shipping-oil.html

Key Facts

Traffic Data (Immediate Post-MOU Recovery Followed by Snag)

  • After US-Iran MOU signing (June 17), oil tanker traffic initially recovered
  • Windward analysis (June 21): Only 12 ships transited on June 21, down from 21 the previous day
  • 5 of 8 inbound vessels traveling dark (AIS disabled) — "sanctioned, Iranian-linked"
  • Windward verdict: "The current traffic profile: dark, sanctioned, Iranian-linked, resembling the late-blockade baseline more than a functioning open strait"
  • Kpler data (earlier): 20 tankers transited June 18 — highest since June 2, but still far below prewar (100+ ships/day including dozens of tankers)

Iran Re-Closure Claim (June 20)

  • Iran announced it had shut the Strait again, citing Israeli ceasefire violations in Lebanon
  • U.S. military denied the claim, stating: "Iran does not control the Strait of Hormuz"
  • Lloyd's List analysis: Commercial traffic continued despite Iran's claim — at least 15 Iran-flagged Suezmaxes/VLCCs were outbound with active AIS as of June 21

US-Iran Talks in Switzerland (Bürgenstock)

  • JD Vance led US delegation; Iranian officials participated
  • Both sides described talks as "constructive but tense"
  • Talks extended into early hours
  • Senior Pakistani official and Iranian official described progress toward a final deal within 60 days
  • Topics included: ending hostilities in Lebanon, establishment of a committee/mechanism for Lebanon deconfliction

Iran Deal Gains (Per Iranian Foreign Minister Abbas Araghchi)

  • Waivers secured for oil and petrochemical exports
  • Lifting of naval blockade on Iranian ports
  • Release of some frozen assets
  • Launch of a reconstruction and development plan

Trump's Pre-Talk Warning

  • Trump on Truth Social: "Iran must immediately stop their highly paid PROXIES in Lebanon from causing trouble. If they don't, we'll hit Iran very hard again, just like we did last week, only harder!!!"

Analytical Notes

  • The "re-opening" was partial and fragile — Iranian-linked vessels dominate; commercial Western traffic remains reluctant
  • The Lebanon ceasefire fault line is now the primary geopolitical risk for Hormuz normalization
  • JD Vance's optimism despite Iran's Strait closure claim signals US prioritization of the diplomatic track
  • Iran's foreign minister framing suggests Tehran got significant economic concessions even if the implementation is contested