# Will another country leave OPEC in 2026: the evidence and conditions to watch A title, governing authority and a transfer of power can diverge. The decisive evidence is institutional: an effective resignation, replacement, removal or loss of authority that meets the rules. Canonical article: https://www.homeincomelab.com/stories/will-another-country-leave-opec-in-2026 Publisher: The Outlook By: [The Outlook editorial desk](https://www.homeincomelab.com/editorial) Category: World Analysis as of: 2026-10-04T10:18:37.348448Z Decision guide market prices observed: 2026-10-04T09:57:48.323Z Published: 2026-10-04T10:18:37.348448Z ## Quick answer This market counts an eligible member’s official withdrawal announcement, even if the departure takes effect later. Informal leaks are excluded. Check the dated quote alongside the full contract before forming a view. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## Key takeaways - This market counts an eligible member’s official withdrawal announcement, even if the departure takes effect later. Informal leaks are excluded. Check the membership baseline at market creation and whether an exit had already been announced before counting a country. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) - An authenticated official act or independently corroborated transfer of the particular authority named in the contract would strengthen the positive case. - The rules distinguish the announcement date from the date a decision takes effect. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## What this event actually asks The useful question is precise: Will another country leave OPEC in 2026? In the API observation at 09:57 UTC on 2026-10-04, the selected contract’s first listed outcome was priced at 17%. The parent event had recorded $187,867 in cumulative volume. This is turnover across the event, not a count of independent forecasters or proof that this outcome is correctly priced. [1](https://polymarket.com/event/will-another-country-leave-opec-in-2026)[2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) The Yes condition is that another OPEC member officially announces its withdrawal from OPEC during the interval from market creation to December 31, 2026, 11:59 PM Gulf Standard Time. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## The exit announcement and its economic consequences are separate OPEC publishes its member-country and organizational information separately from other cooperation arrangements. Assess the exact organization named in the withdrawal notice; disagreement over one production decision is not automatically an exit. [3](https://www.opec.org/member-countries.html) This market counts an eligible member’s official withdrawal announcement, even if the departure takes effect later. Informal leaks are excluded. Check the membership baseline at market creation and whether an exit had already been announced before counting a country. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) A member can reassess the costs of coordination without immediately abandoning it. The evidence that matters for this market is a formal decision, while the effect on production and prices would depend on what happens after that decision. ## Which evidence would change the assessment? An authenticated official act or independently corroborated transfer of the particular authority named in the contract would strengthen the positive case. A temporary absence, an announced future departure or a change in a different office may not meet the rule. Where de facto power matters, a formal title can also be an incomplete guide. The rules distinguish the announcement date from the date a decision takes effect. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## The next useful checkpoint Written-rule date: December 31, 2026; 11:59 PM (the timezone stated in the contract). The selected contract and any reporting grace period govern settlement. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) Our reading is conditional: compare the next primary record with the exact threshold above, then revisit the case if the evidence contradicts it. A high quoted chance does not establish certainty; a low quote does not make the event impossible. The value of the article is a clearer test of the claim, not an asserted trading advantage. ## A fact worth knowing The contract can count an official withdrawal announcement before the exit takes effect. Source: [Polymarket: Will another country leave OPEC in 2026? — selected contract and full resolution rules](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## Weighing the outcome ### Outcome in focus Will another country leave OPEC in 2026? ### Supporting case An authorized and explicit withdrawal announcement by an eligible member would strengthen the positive case. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ### Challenging case An unnamed-source report, policy disagreement or ineligible previously announced exit cannot substitute for the required new formal decision. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ### What to watch - The government’s original authorized communication. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) - Membership and prior-announcement baselines. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) - The announcement deadline and any later effective exit date. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ### What may already be priced in The selected contract’s first outcome was 17% at 09:57 UTC on 2026-10-04. That price is the observation being analyzed, not an independent estimate of fair value. The separately timestamped live panel may differ. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ### Assessment Form a view by checking the specified event against the evidence above. Publicly available context can explain a price without proving that it is wrong; this article does not establish a positive trading edge. ## How the market resolves The Yes condition is that another OPEC member officially announces its withdrawal from OPEC during the interval from market creation to December 31, 2026, 11:59 PM Gulf Standard Time. The rules distinguish the announcement date from the date a decision takes effect. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## Timing and deadline Written-rule date: December 31, 2026; 11:59 PM (the timezone stated in the contract). The selected contract and any reporting grace period govern settlement. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## Questions and answers ### What exactly does this Polymarket event measure? The Yes condition is that another OPEC member officially announces its withdrawal from OPEC during the interval from market creation to December 31, 2026, 11:59 PM Gulf Standard Time. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ### What evidence matters most for this outcome? An authenticated official act or independently corroborated transfer of the particular authority named in the contract would strengthen the positive case. The full contract defines which sources and exceptions govern settlement. [2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ### Does the market’s volume or price prove the outcome? No. The recorded event volume is cumulative trading turnover, while the quote is a contract price at a stated time. Neither is an official finding about the underlying event. Check the exact outcome and its resolution evidence. [1](https://polymarket.com/event/will-another-country-leave-opec-in-2026)[2](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## Related market contracts - [Will another country leave OPEC in 2026?](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) ## Market source [View the event on Polymarket](https://polymarket.com/event/will-another-country-leave-opec-in-2026) For timestamped market prices, see the canonical HTML article. Prices can change independently of this analysis. ## Sources and further reading 1. [Polymarket: Will another country leave OPEC in 2026? — event and aggregate volume](https://polymarket.com/event/will-another-country-leave-opec-in-2026) 2. [Polymarket: Will another country leave OPEC in 2026? — selected contract and full resolution rules](https://polymarket.com/event/will-another-country-leave-opec-in-2026/will-another-country-leave-opec-in-2026) 3. [OPEC: Member countries and organization](https://www.opec.org/member-countries.html) This is AI-assisted, source-linked explanatory journalism. We distinguish facts from interpretation and revise material errors. [How we work](https://www.homeincomelab.com/methodology) · [Corrections and contact](https://www.homeincomelab.com/contact)