Strait of Hormuz traffic returns to normal by July 7?

Platform comparison

Market context

Ships are currently barred from crossing the Strait of Hormuz as commercial traffic has been suspended following Iran’s abrupt closure of the waterway in late June 2026, amid escalating tensions with the US and regional war risks. This shutdown has driven oil prices higher and disrupted global energy flows, with only 25 vessels crossing during a brief reopening on 18 June before the strait was closed again [2][4].

Historically, similar closures in 2026 saw transit counts drop to near zero for weeks, with the Baltic Exchange Gulf-to-China index spiking to 423,736 and war risk insurance premiums surging as carriers imposed surcharges [1]. The current 8% implied probability reflects how rarely the strait has reopened to sustained traffic above 60 daily calls since February, when IMF PortWatch first recorded reduced flows [5]. Traders comparing platforms note that Polymarket’s decimal odds (12.5x) diverge from Kalshi’s implied probability (8%), while Betfair’s fee structure and Smarkets’ KYC reach further shape liquidity and accessibility for this event.

Key catalysts include Iran’s next diplomatic announcement, US Central Command transit reports, and scheduled oil tanker movements. On 21 June, the US Central Command confirmed 55 merchant ships transited the strait with 17 million barrels of oil, suggesting potential for rapid recovery if political conditions shift [9]. Watch for updates from the IMF PortWatch dashboard and MarineTraffic data, which recently showed a spike in vessel movement after the reopening [4]. Any sustained rise above 60 daily calls within the next ten days would trigger a “Yes” resolution before the 7 July settlement window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Strait of Hormuz traffic returns to normal by July 7? 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.

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 UK 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.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative UK 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.