US-Iran Hormuz Agreement by 2026?

Platform comparison

Market context

The key event is whether Washington and Tehran announce a formal diplomatic deal on traffic through the Strait of Hormuz before the market closes, and the 64% crowd price implies traders think that remains more likely than not. Recent reporting has described talks as moving into their “final stages”, while other statements from Iranian officials have stressed that any arrangement may be narrower than a full reopening of pre-war shipping conditions, which matters because the market requires an official agreement that sets out concrete Iranian commitments on vessel traffic.[2][3][6]

This is easier to read against the June MoU and the subsequent temporary shipping arrangements than against a fresh war/no-war binary. Reuters reported that the initial deal already contemplated allowing shipping to resume through Hormuz, and CNN published the 14-point text setting out safe passage provisions and a 60-day negotiating period, so the current market is really a test of whether those interim terms get upgraded into a qualifying instrument rather than merely extended informally.[4][10][17] That history helps explain why a price in the mid-60s can sit alongside unresolved operational details: the market can resolve YES on a narrower but official agreement, even if the strait is not restored to a fully normal pre-war status.[2][3][10]

On platforms, the same underlying event can look different because Polymarket typically shows implied probability directly, whereas Betfair and Smarkets are usually quoted in decimal odds, with the last price needing conversion into an implied chance; that makes a 64% Polymarket-style view roughly comparable to odds near 1.56 on an exchange before fees. The main trader watchpoints are any US-Iran announcement, the timing of scheduled negotiations or mediator statements, and whether the text mentions specific shipping obligations, because a press line about “talks continuing” will not necessarily meet the resolution standard unless it is an actual agreement. KYC access and fee treatment also diverge: exchange access is generally more restricted by jurisdiction and identity checks, while prediction-market platforms vary in eligibility and whether fees are embedded in spread or charged separately.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares US-Iran Hormuz Agreement by 2026? 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 Polymarket Alternative, 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.

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.

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. Polymarket Alternative 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.