Oil slips on US-Iran talk progress as Polymarket puts Starmer exit at 79%
U.S.-Iran Peace Talks Cool Oil Risk Premium as Polymarket “Starmer Out Before 2027” Jumps to 79%
Oil prices fell after signs of progress in U.S.-Iran peace talks emerged, even after U.S. President Donald Trump issued a fresh threat against Iran. The risk-on turn in markets coincided with a firmer Polymarket read on the “Next leader out of power before 2027? (No Orban)” contract, where the top outcome rose to 79%.
Key Takeaways
- Polymarket prices “Starmer - UK PM” as the most likely next leader out before 2027 at 79% (No 21%).
- Crude reversed earlier gains as U.S.-Iran talks in Switzerland showed progress despite Trump’s threat, cooling immediate geopolitical risk pricing.
- The contract is scheduled to resolve by 2026-12-31, with the leading outcome up 2.5 points to 79% in the latest update.
Oil prices fell after signs of progress in peace talks between Washington and Tehran, after a rocky start that included a fresh threat from U.S. President Donald Trump against Iran. Brent crude was down 1.85% at $79.08 as of 2:40 p.m. Singapore time, reversing an earlier gain of as much as 2.2%, while West Texas Intermediate slipped 0.3% to $76.40. Mediators Qatar and Pakistan said the parties agreed to a roadmap toward a final deal in 60 days, with technical talks continuing for the rest of the week in Switzerland. The meeting followed a memorandum of understanding signed last week that was tested after Iran claimed it had closed the Strait of Hormuz, even as millions of barrels of oil continued to flow through the waterway over the weekend. Discussions included steps to keep the strait open and how to enforce a ceasefire between Israel and Hezbollah in southern Lebanon, according to a senior U.S. diplomat involved in the talks.
Polymarket Pricing Breakdown: $3.52M Matched Volume Puts Starmer at 79%, Petro at 17.5%, Netanyahu at 1.2%
On Polymarket, the “Next leader out of power before 2027? (No Orban)” market showed the leading outcome “Starmer - UK PM” at 79% Yes versus 21% No, up from 76.5% previously. The next closest line, “Petro - Colombia President,” traded at 17.5% Yes and 82.5% No, while longer-shot outcomes stayed near the floor, including “Netanyahu - Israel PM” at 1.2% Yes and 98.8% No. Total matched volume stood at $3,518,735, with pricing indicating a heavily skewed distribution toward the Starmer outcome and little probability being assigned to “None before 2027” at 0.15% Yes and 99.85% No.
Watch whether the market sustains its 79% pricing for “Starmer - UK PM” as volume builds toward the 2026-12-31 resolution date, and whether probability compresses into the second-place outcomes.
Beyond Oil and Iran: Other High-Volume Leadership Change Contracts Bettors Are Watching on Polymarket
Beyond leadership-risk pricing, Polymarket traders are also clustering into big-ticket U.S. politics and Iran-focused policy lines, with $663,319,292 matched on “Republican Presidential Nominee 2028” where Robert F. Kennedy Jr. leads at 49.0%, and $636,158,651 on “Presidential Election Winner 2028” led by JD Vance at 20.45%. On the geopolitics side, “What Iranian demands will Trump agree to by June 30?” is priced at 100.0% for Troop Withdrawal on $12,156,097 in volume, while “Who will sign U.S. x Iran deal?” similarly sits at 100.0% for Masoud Pezeshkian with $1,474,710 matched.
Odds Trend
| Window | Change (pp) |
|---|---|
| 24h | +9.5 |
| 7d | +9.5 |
By the Numbers
- Platform: Polymarket
- Market: Next leader out of power before 2027? (No Orban)
- 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: Dec 31, 2026 (UTC)
- Status: Active (open for trading)
- Volume: ~$3,518,735
Top strike rungs
| Strike | Yes | No |
|---|---|---|
| Starmer - UK PM | 79.0% | 21.0% |
| Petro - Colombia President | 17.5% | 82.5% |
| Netanyahu - Israel PM | 1.2% | 98.8% |
| Abbas - President of Palestine | 0.9% | 99.0% |
+20 more strikes not shown
Related Markets
- Presidential Election Winner 2028 — JD Vance 20%
- Republican Presidential Nominee 2028 — Robert F. Kennedy Jr. 49%
- What Iranian demands will Trump agree to by June 30? — Troop Withdrawal 100%
- Who will sign U.S. x Iran deal? — Masoud Pezeshkian 100%