Strait of Hormuz traffic returns to normal by end of June?

Platform comparison

Market context

The Strait of Hormuz, through which roughly one-fifth of global seaborne oil passes, has experienced significant traffic disruption since late 2023 following Houthi attacks on commercial vessels and subsequent military responses. The market asks whether daily transit calls—measured as a seven-day moving average by IMF Portwatch—will recover to 60 or above by end-June 2026. This threshold represents a return to pre-disruption baseline levels. The 18% implied probability across most major platforms reflects broad scepticism that normalisation occurs within the settlement window, though Kalshi's decimal odds format (approximately 5.5 to 6.0) and Polymarket's fractional pricing structure create minor arbitrage opportunities for traders comparing books.

Historical precedent offers limited comfort to bulls. The 2019 tanker attacks and subsequent tensions saw Hormuz traffic decline sharply but recover within months once insurance premiums stabilised and shipping routes adjusted. However, the current disruption differs in character: Houthi operations have proven more sustained and operationally sophisticated, whilst regional tensions involving Iran, Israel, and US naval presence remain unresolved. Betfair and Smarkets both price this market at similar levels to Polymarket, suggesting consensus rather than platform divergence.

Traders should monitor three specific catalysts: announcements regarding US or regional military de-escalation, insurance premium movements (tracked by Lloyd's of London), and monthly IMF Portwatch data releases. Reuters reported in January 2025 that some shipping lines were already rerouting around the Cape of Good Hope permanently, suggesting structural rather than cyclical disruption. Any ceasefire agreement involving Houthi actors or Iranian proxies would be the primary trigger for rapid probability reassessment.

Methodology

This page compares Strait of Hormuz traffic returns to normal by end of June? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Kalshi Alternative UK, 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). Kalshi Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Kalshi Alternative UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Kalshi Alternative UK?

Zero. Kalshi Alternative UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.