Macron, Starmer to co-chair summit on Strait of Hormuz security April 2026

Macron and Starmer will co-chair a summit to secure the Strait of Hormuz on April 17, 2026. The market for UK warship deployment by April 30 sits at 5.5% YES, down from 12% a week ago.

The summit is a move toward multilateral diplomacy during the US-Israel-Iran conflict. The drop from 12% to 5.5% YES suggests traders are pricing in low odds of the UK committing to military involvement, even as diplomatic activity picks up.

Volume is modest at $2,086 in daily USDC traded. It takes just $427 to move the odds by five points, meaning a single large order could swing the market. The largest recent price movement was a 1-point drop, consistent with low trader conviction.

The summit could raise the probability of UK warship deployment, but traders are unconvinced without concrete commitments. At 5.5¢, a YES share pays $1 if the UK sends warships by April 30, an 18x return. For that bet to make sense, you’d need to believe the summit will rapidly translate into military action, which looks speculative given the current timeline.

Watch for announcements from the UK Ministry of Defence or joint statements from summit participants. Confirmation of naval movements or shifts in diplomatic language could move these odds quickly.

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