Iran commits not to attack ships in Hormuz by Sunday?

Platform comparison

Market context

Iran is under direct US pressure to issue a public pledge guaranteeing no attacks on commercial vessels transiting the Strait of Hormuz, a demand that has stalled amid ongoing negotiations in Oman and Switzerland. The US insists this commitment is essential for talks to proceed, yet Iran has previously framed its actions as proportional measures against hostile ships rather than a breach of ceasefire, while simultaneously charging up to $2 million for safe passage for non-hostile vessels [1][3].

Historical precedent suggests such a blanket, unconditional commitment is unlikely given Iran’s reliance on the strait as leverage; recent IRGC naval operations have included capturing and attacking cargo ships like the MSC Francesca without issuing a total policy reversal [2]. The current 2% implied probability reflects this entrenched stance, diverging sharply from platforms like Kalshi or Betfair where decimal odds might better capture the thin margin between a tactical pause and a formal policy shift, whereas Polymarket’s fee structure and lack of KYC often attract speculative volume on such low-probability geopolitical events.

Traders must monitor the outcome of the Sunday negotiations in Switzerland and any official statements from Tehran’s joint military command, as the US has explicitly tied progress to a public guarantee of open lanes [5][7]. A qualifying announcement requires a declarative statement of present or future policy, meaning vague diplomatic assurances or conditional permits for “non-hostile” ships will not resolve the market as YES [3]. Recent reporting confirms the US is demanding a clear pledge that no more shooting will occur, a condition Iran has not yet met [9].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Iran commits not to attack ships in Hormuz by Sunday? 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 Robinhood Prediction Markets, 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

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.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

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. Robinhood Prediction Markets 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.