US lifts Iran blockade, Polymarket puts no US-Iran meeting by June 30 at 40%

US Lifts Iran Blockade: Polymarket Pushes “No US-Iran Meeting by June 30” Up to 40.25% After Khamenei Backs Direct Talks

The US lifted its blockade of Iran on June 18 as a tentative agreement to end the war took effect, and Iran’s supreme leader publicly backed future face-to-face talks with Washington. On Polymarket’s “Where will the next US-Iran diplomatic meeting happen?” contract, traders nudged up the leading outcome “No Meeting by June 30” to 40.25%.

Key Takeaways

Polymarket prices “No Meeting by June 30” as the top outcome at 40.25% (Yes 40.25% / No 59.75%).
Odds shifted after the US lifted its blockade of Iran and Iran’s supreme leader endorsed direct negotiations, keeping attention on whether talks materialize soon.
The market resolves on June 30, 2026, and the leading outcome is up 3.0 percentage points from 37.25%.

The United States on June 18 lifted its blockade of Iran, and oil tankers began moving freely through the Strait of Hormuz after months of disruption as a tentative agreement to end the war took effect. US Vice President JD Vance said he may postpone a trip to Switzerland that had been planned for Friday and was expected to include a ceremonial signing tied to the deal. The trip had been seen as a potential starting point for the next round of US-Iran negotiations. Hours later, Iran’s supreme leader, Ayatollah Mojtaba Khamenei, endorsed direct talks with US officials in a statement carried by state media, while warning that future face-to-face negotiations would not mean accepting the American position. Khamenei said he permitted the memorandum of understanding based on assurances from President Masoud Pezeshkian and said the deal would not be accepted if the US sought excessive demands.

Polymarket Volume Hits $14.5M as “No Meeting” (40.25%) and “Switzerland” (37.45%) Lead US-Iran Diplomatic Venue Odds

On Polymarket, the multi-outcome contract has drawn $14,511,228 in volume, with pricing clustered around a near coin-flip between “No Meeting by June 30” at 40.25% (Yes 40.25% / No 59.75%) and “Switzerland” at 37.45% (Yes 37.45% / No 62.55%). “Qatar” sits at 10.75% (Yes 10.75% / No 89.25%), while longer shots like “Pakistan” trade at 4.2% (Yes 4.2% / No 95.8%). The spread across outcomes shows traders leaning toward either no qualifying meeting by the June 30 deadline or a Switzerland venue if talks happen, with limited probability assigned elsewhere.

Traders will be watching for confirmation of any scheduled US-Iran diplomatic session and, if announced, whether organizers specify Switzerland or another venue ahead of the June 30, 2026 resolution date.

Beyond US-Iran Talks: Other High-Volume Geopolitical and Macro Contracts Polymarket Traders Are Watching

Beyond the venue question, Polymarket traders are also crowding into adjacent Iran-risk contracts that could steer headlines and asset prices: “Strait of Hormuz traffic returns to normal by end of June?” is priced at 90.5% on $28,163,263 in volume, while “Iran agrees to end enrichment of uranium by June 30?” has “No” at 80.5% with $8,625,331 traded. Another fast-moving tape is “US-Iran deal text released by…?”, where “June 19” sits at 100.0% on $6,579,842. Further out the curve, “Iran agrees to end enrichment of uranium by December 31?” is effectively a coin flip, with “No” at 53.0% on $816,333.

Odds Trend

Window	Change (pp)
24h	-3.0
7d	-3.0

By the Numbers

Platform: Polymarket
Market: Where will the next US-Iran diplomatic meeting happen?
Contract type: Price strike ladder: each rung has separate Yes/No; Yes means the spot price is above that USD strike at settlement.
Resolution window: Jun 30, 2026 (UTC)
Status: Active (open for trading)
Volume: ~$14,511,228

Top strike rungs