Who will sign U.S. x Iran deal?

Platform comparison

Market context

The real-world event is a preliminary memorandum of understanding signed by US President Donald Trump and Iranian President Masoud Pezeshkian to end the ongoing conflict, which includes a 60-day window to negotiate a final agreement on nuclear constraints and sanctions relief. Both leaders electronically authorised the deal, with Trump confirming the US side is fully signed and in-person signing by delegations scheduled for Friday in Geneva, where Vice President JD Vance will represent the US[1][2].

Historically, such interim accords rarely culminate in binding final treaties without significant external pressure; the 3% crowd-implied probability reflects scepticism that this memorandum will evolve into a written agreement where both nations are formal parties by July 2026, mirroring past failures where 60-day negotiation windows expired without resolution[4]. Traders should monitor the release of the full text, which Trump promised will occur soon, and the outcome of the Geneva meeting, as any delay or refusal to ratify the deal through a UN Security Council resolution would confirm the market’s "No" outcome[2][5].

Platform comparisons reveal key divergences: Polymarket offers decimal odds with low fees but minimal KYC, whereas Kalshi and Betfair require identity verification and charge higher fees but provide implied probability metrics that better capture institutional sentiment on this specific geopolitical risk[1]. Kalshi’s regulatory framework may limit exposure to such volatile markets compared to Smarkets, where liquidity is deeper but fee structures vary by trader tier, creating distinct pricing inefficiencies for this deal’s settlement window ending August 2026[3][6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Who will sign U.S. x Iran deal? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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. Kalshi 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.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative 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.