Will 2026 ships transit the Strait of Hormuz on any day by July 31?

Platform comparison

Market context

The Strait of Hormuz has seen commercial traffic collapse by over 95% since early 2026, with daily crossings falling from a pre-conflict average of 75–125 ships to single digits, while oil tanker flow remains near standstill[1][6]. Iran has reportedly approved passage for GCC, European, and foreign vessels through a limited controlled route, charging approximately $2 million per ship, yet most detected transits involve Iran-linked or high-risk ships using spoofed signals to evade targeting[1]. This severe disruption frames the current 44% YES probability: traders must weigh whether the fee-based controlled route will normalise arrivals enough to meet the market’s threshold before July 2026, or whether geopolitical friction will keep traffic suppressed.

Key catalysts include Iran’s enforcement of the $2 million fee, any new attacks on commercial vessels, and shifts in GCC or European diplomatic stance toward the controlled route[1]. Traders should monitor IMF PortWatch’s weekly data revisions (updated Tuesdays 9 AM ET) for finalized daily transit calls, as only data points confirmed after the next day’s release count[2][7]. Recent MarineTraffic data confirms commercial traffic remains in single digits, suggesting the threshold is unlikely to be met unless Iran significantly relaxes restrictions or global oil demand forces a surge in tanker movements[1].

Platform comparisons reveal divergences: Polymarket displays decimal odds (e.g., 2.27 for 44% implied probability) with lower fees but no KYC, whereas Kalshi uses implied probability directly, mandates KYC, and charges higher fees for regulatory compliance. Betfair and Smarkets similarly offer decimal odds but vary in liquidity and fee structures for niche geopolitical markets. On this specific market, the fee difference and KYC reach may influence where traders concentrate liquidity, with Polymarket attracting risk-tolerant participants and Kalshi appealing to regulated institutional players seeking transparency in data sourcing from IMF PortWatch[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Will 2026 ships transit the Strait of Hormuz on any day by July 31? 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 UK, which mirrors the Polymarket order book at 0% fees.

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.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

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.