Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Alternative) Pick polygram.ink (preferred broker) |
3% | 97% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
3% | 97% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 31 | 3% |
| July 31 | 1% |
| June 24 | 0% |
| March 31 | 0% |
| April 30 | 0% |
| June 30 | 0% |
| May 31 | 0% |
| April 15 | 0% |
Market context
Kharg Island functions as Iran’s primary oil export terminal, handling roughly 90% of the nation’s crude exports and serving as the economic lifeline for the Islamic Revolutionary Guard Corps. Its strategic location in the northern Persian Gulf, 34 miles northwest of Bushehr, makes it a critical vulnerability for the regime, with the US and Israel having previously targeted Iranian military facilities there. The market’s 1% implied probability reflects the extreme difficulty of displacing Iranian control over such a fortified, economically vital asset before March 2026.
Historically, comparable cases of territorial displacement in the Gulf—such as the 1980s US-led seizure of oil platforms or the 2003 Iraq invasion—required sustained coalition warfare and explicit state-level objectives, not isolated raids or sabotage. These precedents suggest that temporary disruption, naval presence offshore, or special operations alone cannot satisfy the market’s resolution criteria, which demands another state or internationally backed authority to establish primary governmental or military control. The low probability aligns with the absence of any credible, active campaign to seize the island.
Traders should monitor official announcements from Tehran regarding oil export routes, US defence posture in the Gulf, and any scheduled sanctions or military exercises that could escalate tensions. Recent reporting from CNBC in March 2026 highlights Kharg’s centrality to Iran’s oil industry and notes ongoing threats from US and Israeli officials, yet no concrete operational plan has emerged to alter control[4]. Divergence between platforms like Polymarket (decimal odds) and Kalshi (implied probability) may reflect differing fee structures and KYC requirements, but the underlying real-world assessment remains consistent across books.
Methodology
We read Kharg Island no longer under Iranian control by 2026? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.
Resolution & payout
Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.
Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.
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.
- What about Smarkets as an alternative?
- Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.
- Which platform is accessible globally?
- Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.
- Which platform supports Klarna/SOFORT?
- Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.
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