Strait of Hormuz traffic returns to normal by September 15?

Platform comparison

Market context

The Strait of Hormuz handles roughly one-third of seaborne traded oil globally. The market asks whether daily transit traffic—measured as a seven-day moving average of arriving ships across all cargo types—will reach 60 calls per day by mid-September 2026. The crowd assigns this outcome just 9% probability, implying consensus expects sustained disruption or a structural shift in routing patterns over the next eighteen months.

Historical precedent suggests the Strait recovers transit volume relatively quickly after acute shocks. During the 2022 Red Sea crisis and subsequent Houthi attacks on shipping, transits dipped but rebounded within weeks once insurers repriced risk and operators adjusted schedules. Pre-2024, the Strait averaged 80–90 daily transits; the 9% probability reflects either persistent geopolitical tension, a sustained shift toward alternative routes via the Cape of Good Hope, or expectations that IMF Portwatch data will remain below the 60-call threshold even if physical traffic normalises. The low odds also price in the possibility that rerouting becomes economically entrenched, with shippers absorbing longer transit times rather than facing Hormuz-specific risk premiums.

Traders should monitor Iranian nuclear negotiations, US sanctions policy, and any escalation in regional naval activity—all of which influence insurer appetite and shipping route decisions. Announcements from major oil exporters (Saudi Arabia, UAE) regarding export logistics will signal confidence in Hormuz passage. Equally, any major shipping line formally committing to Cape routing or establishing regional hubs outside the Strait would reinforce the bearish case. IMF Portwatch data releases occur regularly; the threshold of 60 daily arrivals represents a meaningful recovery but not a full return to pre-disruption norms.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.