Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi Alternative) Pick polygram.ink (preferred broker) |
8% | 92% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
8% | 92% | 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 → |
Market context
The Strait of Hormuz has been effectively closed to commercial shipping since late February 2026, following a reversal of Iran’s reopening after reported attacks on vessels. With the current crowd-implied probability of only 9% that transit calls will reach the required 60 per day by July 7, traders are betting on continued disruption rather than a swift recovery. This market resolves if IMF Portwatch publishes a 7-day moving average of arrivals equal to or above 60; ships not reported by the IMF are excluded, and the settlement window ends on 2026-07-07.
Historically, similar closures—such as those during the 1980s Tanker War or the 2019 oil tanker attacks—saw traffic rebound within weeks once diplomatic pressure eased. However, the current situation involves active war risk, missile threats, and AIS-off vessels, which have driven freight indices like the Baltic Exchange MidEast Gulf to China to 423,736 and tripled the Mideast Gulf to Med Suez Max index to 267,579 in recent weeks[1]. Unlike Polymarket’s decimal odds, Kalshi and Betfair emphasise implied probability, while Smarkets’ lower fees and relaxed KYC may attract traders seeking exposure to this high-risk geopolitical event.
Traders should monitor the Strait of Hormuz Live Tracker for any reopening signals and watch for announcements from the IMF Portwatch, which reduced traffic reporting since 28 February 2026[5]. A recent NBC News graphic confirms traffic has been at a near-standstill for weeks amid the Iran war[3], but MarineTraffic data shows 25 commercial vessels crossed on 18 June—the highest since mid-April[4]. This modest recovery may not suffice to meet the 60-call threshold, especially if war risk cover expires or missile attacks escalate, as noted by tanker owners still pushing through despite threats[1]. Kalshi-alternative.com readers comparing books should note how fee structures and KYC reach diverge on this specific market, where implied probability dominates over decimal odds.
Methodology
This page compares Strait of Hormuz traffic returns to normal by July 7? 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 Kalshi Alternative, 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.
- 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. Kalshi 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. Kalshi 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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