Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Robinhood Prediction Markets) Pick polygram.ink (preferred broker) |
97% | 3% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
97% | 3% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 31 | 97% |
| August 15 | 96% |
| July 31 | 94% |
| July 19 | 0% |
| July 21 | 0% |
| July 24 | 0% |
Market context
The practical question is whether Washington publicly confirms a halt in *offensive* action against Iran, not whether fighting on the ground quietens informally. Recent coverage shows the US has already used wording such as “suspended all aggressive actions”, “orders all offensive operations … to cease”, and “the offensive stage of Iran war is over”, which is exactly the sort of formal language that would satisfy this market if repeated again before expiry.[1][2][3]
That makes the current 0% crowd-implied price look more like a sceptical stance on *future* announcements than a view that no halt has ever occurred. Comparable markets in this area tend to move sharply on precise phrasing: a ceasefire, truce, pause, or cessation can all count if the announcement clearly covers offensive operations, while defensive postures, patrols, or temporary pauses may not.[1][3][9][10] On Polymarket and Kalshi, the same event can trade differently because one venue shows prices as a direct probability while the other may quote in contract terms or dollars, and fee/KYC access can also differ by jurisdiction; on Betfair or Smarkets, decimal odds and exchange commissions matter more than a simple “yes/no” headline probability. That means a thin market can look cheaper or dearer depending on whether fees are embedded, and a 0% print may reflect low liquidity rather than strong conviction.
The main catalysts are official White House, Pentagon, or State Department statements, plus any Trump social posts or briefing-room remarks that are later echoed by named officials. Traders will also watch ceasefire diplomacy tied to the Strait of Hormuz, because earlier reports linked any pause in strikes to maritime access and “mutual agreement” language.[1][8][10][11] If headlines only describe a pause, defensive readiness, or a temporary hold, that is weaker than an explicit announcement that offensive operations have ended, terminated, or been suspended.
Methodology
This page compares US announces halt in Iran offensive operations by 2026? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.
FAQ
- Polymarket vs Kalshi — which is better?
- Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.
- Which platform has the deepest liquidity?
- Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.
- Is Betfair a Polymarket alternative?
- Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.
- Which platform is accessible globally?
- Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.
- Are all these platforms regulated?
- No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.
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