Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
32% | 68% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
32% | 68% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| December 31 | 32% |
| July 31 | 16% |
| June 30 | 1% |
Market context
The United States has already publicly announced a naval blockade targeting Iranian ports and coastal areas, a move declared by President Trump on 12 April 2026 after ceasefire talks collapsed. This event, which took effect the following day, directly satisfies the market’s core condition for a “Yes” resolution, rendering the current 32% crowd-implied probability a significant mispricing of an event that has already occurred.
Historically, such blockades lack precedent in recent decades, yet past Middle East military actions offer a framework for interpretation. The US Navy has a documented history of tracking and boarding merchant vessels regardless of consent, and CENTCOM has clarified that the blockade focuses on preventing ships from arriving or departing Iranian ports rather than interdicting the Strait of Hormuz itself. Early enforcement reports indicate at least 29 vessels turned back, demonstrating tangible deterrence against sanctions-evasion shipments, which suggests the announcement was not merely rhetorical but operationally active.
Traders should monitor CENTCOM updates on vessel redirections and any shifts in Iran’s stance on Strait access, as these serve as immediate catalysts for market validation. Recent reporting confirms that over 34 vessels were directed to return to port within weeks of the blockade’s launch, reinforcing the operational reality of the announcement. For this specific market’s accessibility, the regulatory landscape remains complex: German GlüStV implications and US CFTC reach define compliance boundaries, while the “no-KYC up to $1,500” threshold offers limited but practical entry for retail participants navigating these legal constraints.
Methodology
This overview of US announces blockade on Iran by 2026? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Polymarket Legal UK has a different geo footprint.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Legal UK exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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