The Prediction Markets

Israel military action against Iran by...?

Closed
Apr 21, 2026
Traded
$3.2M
Venues
Polymarket
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This market has closed

Trading ended on Apr 21, 2026. The prices below are the last ones before it closed and no longer update. Browse open markets

Odds by venue

Consensus blends each venue’s last price, weighted by how much has traded there. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

Prices come from our regular polls of each venue, the oldest 180 days ago. Ages are as of when this page was built.

  • Polymarket
April 21
0.4%
Polymarket 0.4%polled, 4323 h agoBest Yes 0.7¢ on Polymarket, $100 pays $14,286 (143x)
Polymarket
Contract
April 21
Last price
0.4%
As of
Polled 180 d ago
Buy Yes
0.7¢
Sell Yes
—
$100 on Yes pays
$14,286 (143x)
Volume
$1.9M
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle

How the odds have moved

The leading outcome on both venues, with the consensus between them. Hover for exact values.

  • April 21

Order books

Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.

Top of book

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Depth · top 8 levels

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Recent trades

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What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

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Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.05 × price × (1 − price) per share (other / general rate). Fee calculator. Estimates only, not advice.

About this market

Final prediction market prices for "Israel military action against Iran by...?". April 21 last traded at 0.4%. $3.2M has traded across 1 outcome on Polymarket. The market closed on Apr 21, 2026.

This market will resolve to "Yes" if Israel initiates a drone, missile, or air strike on Iranian soil between market creation and the listed date in Israel Time (GMT+3). Otherwise, this market will resolve to "No". For the purposes of this market, a qualifying "military action" is defined as the use of aerial bombs, drones, or missiles (including cruise or ballistic missiles) launched by Israeli military forces that impact Iranian ground territory. A strike on any area within the terrestrial territory of Iran counts, including buffer zones. Missiles or drones that are intercepted and surface-to-air missile strikes will not be sufficient for a "Yes" resolution, regardless of whether they land on Iranian territory or cause damage. Actions such as artillery fire, small arms fire, FPV or ATGM strikes, ground incursions, naval shelling, cyberattacks, or other operations conducted by Israeli ground operatives will not qualify. The primary resolution source will be official government/military statements (Israeli or foreign), multilateral bodies (UN, etc.), or a consensus of credible reporting from major international media and national broadcasters/newspapers. If the date/time of a strike cannot be confirmed by a consensus of credible reporting by the end of the third calendar date after this market's end date, it will resolve to "No" regardless of whether a strike was later confirmed to have taken place.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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