US-Israel joint airstrikes against Iran have resolved the Iran military action market at 100% YES, while odds of other countries conducting military action against Iran remain low at 4%, up from 3% a week ago.

Market reaction

The Iran action market shows no new trades, its outcome confirmed by events on the ground. The “countries striking Iran” market has seen $1,046 in USDC traded over the last 24 hours, with just $427 needed to shift odds by 5 points. That thin liquidity means prices could move quickly if another country signals military involvement.

Why it matters

Iran’s drone capabilities and geographic advantages, particularly the Zagros Mountains, make Western military operations expensive and difficult. Asymmetric tactics raise the cost of intervention for any additional countries considering strikes. For traders, the low probability assigned to additional countries joining creates a high-payout contrarian bet: a YES share in the UK strike market pays $1 if resolved, a potential 25x return.

What to watch

Saudi Arabia or UK military statements would be the clearest catalysts for price movement. Any de-escalation signals from Iran could also shift the trajectory of these markets. Defense ministry communications from regional capitals are the main source of new information here.

API access

Get prediction market intelligence as a structured API feed. Early access waitlist.