Strait of Hormuz traffic returns to normal by August 31?

Platform comparison

Market context

The Strait of Hormuz is currently closed to commercial shipping, with a brief reopening on 21 April 2026 reversed the following day. This immediate closure after a short window of activity mirrors the volatility that defines the region’s transit history, where geopolitical deals often fail to sustain operational normality. For a power-user evaluating this market programmatically, the current 20% crowd-implied probability reflects the historical fragility of such reopenings; past data shows that even when agreements are signed, the 7-day moving average of arrivals rarely sustains the 60-ship threshold required for a "Yes" resolution. The market essentially bets on whether the next diplomatic push will overcome the entrenched logistical and security barriers that have kept the strait shut since April.

To approach this tooling effectively, traders must monitor the specific catalysts that could shift the probability: the publication of the next IMF PortWatch transit report and any new announcements from Iran or the United States regarding the waterway deal. A recent Reuters report confirmed that commercial traffic rose sharply immediately after the US-Iran agreement, yet the subsequent closure suggests that external monitoring tools like MarineTraffic or ShipFinder are critical for validating real-time throughput against the official 7-day average [6]. Programmatically, one would set conditional orders to trigger only if the daily transit calls for container, dry bulk, and tanker ships exceed 60 for a sustained period, as the market resolves instantly upon this threshold being met. The dependency on IMF PortWatch data means that any discrepancy between live tracker counts and official reports will be the primary driver of price movement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Strait of Hormuz traffic returns to normal by August 31? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.