Which countries will send warships through the Strait of Hormuz by July 31?

Platform comparison

Market context

The question hinges on whether any nation's military vessels will pass through the Strait of Hormuz—the 54-kilometre chokepoint between Iran and Oman through which roughly one-fifth of global seaborne oil transits—within the next eighteen months. The strait has been a flashpoint for naval posturing, particularly involving the US Navy, which maintains a persistent presence in the Persian Gulf and regularly conducts freedom-of-navigation operations. The 5% implied probability reflects the rarity of explicit, publicly confirmed warship transits by non-regional powers during peacetime, though the definition's reliance on "broad consensus of credible reporting" introduces settlement ambiguity that traders on Kalshi and Polymarket may interpret differently given their distinct KYC and reporting standards.

Historical precedent suggests transits occur but remain contested. The USS Eisenhower carrier strike group and accompanying destroyers have operated in the region repeatedly; however, whether such movements constitute deliberate "transits" through the strait proper versus operations in the Persian Gulf remains disputed. The 2019 tanker attacks and subsequent US military responses generated conflicting accounts of vessel movements. Kalshi's binary framework and Betfair's lay-betting mechanics will likely diverge on edge cases where military activity is confirmed but the strait-specific routing is ambiguous.

Traders should monitor Iranian military announcements, US Central Command statements, and shipping intelligence services such as Lloyd's List for explicit corridor passages. Any escalation involving Israeli-Iranian tensions, Houthi activity affecting shipping lanes, or formal naval exercises would sharpen the probability. The settlement window's eighteen-month span captures multiple potential flashpoints, though the current 5% odds suggest markets are pricing routine operations as unlikely to meet the strict evidentiary threshold required for resolution.

Methodology

This page compares Which countries will send warships through the Strait of Hormuz 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

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). On-chain settlement clears in minutes — the fastest payout path of the four.

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.

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.

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.