Iran reopens Strait of Hormuz at Paris summit with Macron, Starmer

Iran declared the reopening of the Strait of Hormuz during a Paris summit hosted by Macron and Starmer with 49 countries. The market for UK warships through the strait by April 30 sits at 8.5% YES.

Market reaction

The announcement came as European leaders discussed a non-belligerent multinational mission for mine clearance. Odds for UK warships through Hormuz held flat at 8.5%, down from 12% YES a week ago. The largest move today was a 1-point drop.

Why it matters

The flat reaction suggests traders want concrete military commitments before repricing. With 14 days until resolution, the question is whether the UK Ministry of Defence will confirm any deployments. Daily actual USDC volume is $2,086, and it takes just $427 to move the odds 5 points. That thin order book means even a minor official statement could cause a sharp repricing.

What to watch

Iran’s reopening of the strait moves toward de-escalation, but traders appear to treat it as noise without follow-through from the UK or other European countries. At 8.5¢, a YES share pays $1 if the UK sends warships by April 30, a 16x return that requires swift diplomatic and military action. The specific triggers: announcements from the UK Ministry of Defence or confirmation of allied naval missions as the April 30 deadline approaches.

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