Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Mundial 2026 Grupos) Pick polygram.ink (preferred broker) |
6% | 94% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
6% | 94% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| December 31 | 6% |
| March 31 | 0% |
| April 30 | 0% |
Market context
The US is already fighting Iran militarily, but a **formal declaration of war by Congress** is a separate legal act and remains the key threshold for this market. That distinction matters because the current conflict has been driven by strikes, retaliation and ceasefire breakdowns rather than by the constitutional war-declaration process described in the market rules.[1][3][12]
Historically, the probability stays low because modern US wars have typically been authorised through AUMFs or executive action rather than an outright declaration of war. In this case, Congress has already shown interest in constraining the conflict: on 23 June, the Senate passed a measure requiring the administration either to end war operations or seek congressional consent to continue, which points to oversight pressure rather than momentum towards a formal declaration.[1] Comparable recent reporting also describes the US and Iran as locked in an escalating cycle of strikes, yet still short of any clear legislative move towards war declaration.[4][7][8]
Traders should watch for any White House request for congressional authorisation, emergency Hill votes, or a sharp widening of the conflict that forces lawmakers to act. The main catalysts are developments in the Strait of Hormuz, where US officials have warned of further escalation if Iranian attacks on shipping continue, and any collapse of the current ceasefire or interim understandings.[4][12][16] Reuters has also reported that Gulf states and Israel see the situation as increasingly likely to tip into military confrontation, but that is still not the same as Congress passing a declaration of war.[2]
Methodology
Football-specific comparison page for Pronóstico: Will the US officially declare war on Iran by 2026?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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