Iran seizes two vessels in Strait of Hormuz, UK naval response unlikely

Iran’s Revolutionary Guard seized two vessels in the Strait of Hormuz, and the Polymarket contract on the UK sending warships through the Strait by April 30 now sits at 2% YES, down from 6% a day ago.

Market reaction

The UK warship deployment contract trades at 2% YES, unchanged across multiple sub-markets for the April 30 deadline. The drop from 6% happened over the past 24 hours. Term structure is flat, and sub-markets for Canada, India, Pakistan, and France show no movement either, meaning traders aren’t pricing in a response from any of these countries.

Why it matters

Combined trading volume across these markets is $52,688 in face value over the last 24 hours, but actual USDC traded is only $1,142. That makes these contracts thin: just $343 can move the odds by 5 percentage points. A single moderately sized order could create large swings in the displayed probability.

What to watch

A YES share at 2¢ pays $1 if the UK sends warships through Hormuz by April 30, a 50x return. That bet only makes sense if you believe a UK naval response is likely within seven days. The key trigger would be a statement from the UK Ministry of Defence or allied navies confirming warship movements toward the Strait. Without that, the 2% price reflects traders’ view that diplomatic channels, not naval deployments, are the more likely near-term response.

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