20 July 2026.

Situation

The Strait of Hormuz is under acute operational stress following a cluster of attacks in the past 24 hours. The most serious development: a merchant tanker was abandoned after catching fire when struck by a projectile of unknown origin near the strait, according to a UKMTO advisory cited by gCaptain. Separately, Greek tanker manager Dynacom, previously the largest non-Iranian commercial operator still transiting the strait, confirmed two of its managed vessels were hit by projectiles off Oman on Monday, per gCaptain and Reuters. Physical throughput data reflects the deterioration: PortWatch recorded just 10 transits on 2026-07-12, against a pre-crisis baseline of 88 per day, though that figure is now eight days old given PortWatch's weekly Tuesday publication schedule. Scraper-derived 24-hour arrivals at Gulf ports registered 316 vessels, a distinct methodology that cannot be directly compared with the PortWatch count. The Hormuz Index Crisis Pressure state composite sits in the extreme band, flat over the past 24 hours, with physical transit deviation as its top contributor. The 30-day Escalation Forecast composite is in the elevated band and rising, driven chiefly by Polymarket closure odds, a divergence from the current-state reading that signals market participants are pricing in continued deterioration even as measured pressure has plateaued. Brent at $88.98 (plus 1.00% over 24 hours, as of this morning) reflects that forward risk premium. The Houthis have also declared a naval blockade on Saudi Arabia, though that claim rests on Iranian state media and Houthi-aligned sources and has not been independently confirmed by CENTCOM or Western governments.