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Yes 4.6%
Only Polymarket lists this market, so there is no second price to compare.
Fair chance strips out each venue’s built-in margin (its prices add up to more than 100%), then blends the venues by how much has traded there, so the outcomes add up to 100%. 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 1 min ago. Ages are as of when this page was built.

The leading outcome on both venues, with the consensus between them. Hover for exact values.
Each venue’s resting orders for the Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.
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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 0.04 × price × (1 − price) per share (politics rate). Fee calculator. Estimates only, not advice.
Live prediction market odds for "NATO troops fighting in Yemen before 2027?". Yes leads at 4.6%. $19K has traded across 1 outcome on Polymarket. The market is expected to resolve by Jan 1, 2027.
This market will resolve to "Yes" if active military personnel officially affiliated with any NATO member state enter Yemen for combat-related military purposes directly pertaining to the ongoing conflict in Yemen by December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No". For military personnel to qualify toward a "Yes" resolution, they must be 1) officially acknowledged as active military by NATO or the member state they are affiliated with; 2) be publicly acknowledged by NATO or the member state to have entered Yemen for a combat-related military purpose directly pertaining to the ongoing conflict with the Houthis. For military personnel to qualify toward a "Yes" resolution they must be active duty troops and acknowledged as described above. Participation in a combat role is necessary for this market to resolve to "Yes" (e.g. military personnel providing training or intelligence support would not qualify toward a "Yes" resolution, however infantry engaging Houthi forces, or personnel conducting combat operations against the Houthis from Yemeni soil would qualify toward a "Yes" resolution). Only members of the regular armed forces of a NATO member state will qualify toward a "Yes" resolution. Foreign fighters, private military contractors, mercenaries, or any other personnel recruited, paid, trained, equipped or directed by a NATO member state who are not members of that state’s armed forces will not qualify, regardless of whether they operate under its command or on its behalf. Members of a NATO member state’s armed forces operating as part of a coalition, including a Saudi-led coalition, will qualify. Personnel must be physically present on the terrestrial territory of Yemen, including its internal waters. Air or naval operations conducted from outside Yemeni territory, including air strikes, missile strikes, drone strikes and overflights, will not qualify toward a "Yes" resolution. The primary resolution source for this market will be official information from NATO and the governments and defense ministries of NATO member states; however, a consensus of credible reporting will also be used.
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%.
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.
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.
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.
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.