Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
73% | 27% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
73% | 27% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 31 | 73% |
| August 15 | 61% |
Market context
A diplomatic agreement on Hormuz is already being judged against a live June framework, because Reuters, CNN and NPR all reported an initial US-Iran understanding to reopen shipping and begin a 60-day follow-on negotiation period.[10][13][17] That matters for interpretation: this market does not ask whether a ceasefire or temporary de-escalation exists, but whether a qualifying diplomatic instrument is announced by the deadline and specifically sets Iranian obligations to permit or increase traffic through the strait.[10][17] With crowd pricing at 63% YES, the market is implying that traders think the path from interim deal to formalised agreement is still open, but not certain.
Comparable cases suggest that the key distinction is between an initial memorandum and a later, enforceable arrangement. Reporting since mid-June has described the Hormuz file as a framework deal with a 60-day runway, while later coverage in July and early August showed talks still active and, at times, unresolved on how fully the waterway would be restored.[4][7][11] Reuters also noted that an earlier round of indirect talks ended without clear progress, even as shipping resumption remained part of the proposed package.[2] In prediction-market terms, that makes the contract highly sensitive to wording: a statement about “final stages” is not enough unless it produces an official agreement that matches the settlement criteria.[3][7]
The main catalyst is any formal announcement from Washington, Tehran, or a recognised mediator confirming a signed deal, joint statement, or equivalent document before 31 August 2026.[3][7] Traders should also watch for scheduled negotiating rounds, leaks about drafting or sign-off, and any change in US sanctions posture, since Treasury relief has previously been tied to the broader package and can signal whether talks are moving from rhetoric to executable terms.[6][10] On the crypto side, this is the sort of geopolitical headline that can feed into BTC and ETH risk sentiment through oil, inflation and rates expectations, while the market itself settles in USDC, so sharp moves in dollar liquidity or broader risk appetite may affect pricing even before the event resolves.
Methodology
This page reads US-Iran Hormuz Agreement by 2026? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
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