Where will the next US-Iran diplomatic meeting happen?

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Market context

The next US-Iran diplomatic meeting is still more likely to be set by venue and security than by substance. The current 37% implied probability for a US-hosted meeting looks modest because the recent pattern has favoured third-country locations rather than either capital. Earlier rounds were held in Oman, Rome, Geneva and Islamabad, with talks often announced only after mediators had already lined up a venue. That history matters: when Washington and Tehran have resumed contact, the meeting place has usually reflected who is willing to host and how quickly both sides can agree on an intermediary, not a fixed rotation.

For traders, the main signals are any public scheduling notice from Oman, Pakistan, Switzerland or another facilitator, plus reports that the delegations are being “arranged” rather than simply “in contact”. Recent reporting has also pointed to continued low-level diplomacy despite hardening rhetoric. Bloomberg noted in April that US and Iranian officials ended a Geneva round by agreeing to reconvene, even as Trump was massing forces in the region, while Euronews reported diplomats were already trying to organise a second round during the first day of earlier US pressure. That suggests venue selection can move quickly once both sides accept the format.

The key dependency is whether the next meeting is direct or indirect. If talks are mediated, the most plausible countries are still the usual hosts for shuttle diplomacy: Oman, Switzerland or Pakistan. A sudden shift to a bilateral meeting with officials in one country, or a confirmed venue in Europe or the Gulf, would be the clearest catalyst for repricing.

Sources: 1 · 2 · 3 · 4

Methodology

We track Where will the next US-Iran diplomatic meeting happen? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.