Iran threatens decisive action against US after vessel attack

Iran’s military is threatening decisive action against the US following an attack on an Iranian vessel. The probability of Iran striking Israel by April 30 sits at 100% YES.

Market reaction

The Iran military action market is already fully priced at 100% YES, with no movement despite the new rhetoric. The term structure is flat, showing a consistent expectation of conflict within the next 12 days.

For the UK striking Iran by April 30, odds are at 0.7% YES, down from 1% yesterday. Daily USDC trading volume is just $15, and the order book is thin enough that $273 would shift odds by 5 points. That signals very little conviction in UK involvement.

Why it matters

The military action markets are largely dormant. Zero face value has traded on Iran’s actions, and UK involvement volume is minimal. Traders are either waiting for concrete developments or consider the situation too uncertain to take positions on.

Iran’s threat could amount to rhetoric rather than action. Past retaliations haven’t led to full-scale escalation, and the flat markets suggest traders agree. But at 100% YES, anyone betting against Iran striking Israel needs a de-escalation within days, not weeks.

What to watch

Statements from the IRGC, particularly any announcements about direct retaliatory strikes. Confirmation of such actions would lock in the current market pricing and could shift odds in the UK and allied involvement markets.

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