Iran closes Strait of Hormuz, Bitcoin and Ethereum prices drop

Iran announced the closure of the Strait of Hormuz, sending Bitcoin and Ethereum lower while the Polymarket contract on the UK sending warships through the strait by April 30 sits at 6% YES.

Market reaction

The UK warship market has fallen from 12% a week ago to 6% YES with 14 days remaining, pricing in low probability of imminent British naval action even as tensions rise. Trump’s likelihood of agreeing to Iranian sanction relief moved the opposite direction, climbing from 28% a week ago to 48% YES, suggesting some traders see a diplomatic path forward alongside the military standoff.

Daily USDC volume on the UK warship market is $2,086, with just $427 needed to shift odds by 5 points. That makes it a thin market where a single large trade can move the price significantly. The Trump sanction relief market trades $1,975 daily, with $285 required for a 5-point move. Crude oil contracts tied to $90 by June have no active trading data yet, but the strait’s role in global oil transit makes them worth monitoring.

Why it matters

The strait’s closure directly complicates any ceasefire prospects and raises the question of whether Western powers will respond militarily or pursue concessions. The divergence between the warship market (falling) and the sanction relief market (rising) suggests traders currently lean toward a diplomatic rather than military outcome.

What to watch

Statements from the UK Ministry of Defence and any reported naval movements near the strait will be the most direct catalysts for these markets. Buying YES on the warship contract at 6¢ pays 16.67x if warships transit by month’s end, a speculative bet that military escalation overtakes diplomacy.

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