Saudi-Houthi ceasefire agreement announced by October 31?

- [2026-09-03] Houthis launched a major offensive against the Saudi-backed Presidential Leadership Council in Taiz, expanding into the broader 2026 Yemen offensives that continue to the present, ending the informal calm that had existed under the 2022 truce. On 3 September 2026, the Houthis launched an offensive against the Saudi-backed Presidential Leadership Council (PLC), the internationally recognized government of Yemen, amid the ongoing Yemeni civil war, with clashes beginning in Taiz Governorate. - [2026-07-13] The proximate trigger for the collapse of the informal Saudi–Houthi ceasefire was a Saudi/Yemeni government strike on Sanaa airport's runway to block an Iranian aircraft; a Mahan Air flight carrying IRGC commanders and weapons attempted to land at Sanaa Airport, Yemeni government forces and Saudi Arabia struck the airport's runway to prevent the landing, and in retaliation the Houthis declared the ceasefire with the Yemeni government and Saudi Arabia over. - [2026-07-20] The Houthis then imposed a formal blockade on Saudi Arabia: a maritime and aerial embargo declared by the Houthis against Saudi Arabia on 20 July 2026, marking a major escalation and ending a roughly four-year period of relative calm that had held since the 2022 UN-brokered truce. - [2026-09-08] Houthi drone/missile strikes on Saudi Arabia wounded dozens and hit oil infrastructure, with a wave of Houthi attacks on Saudi Arabia Tuesday wounding more than 70 people and igniting fires at several oil facilities and utilities in the kingdom's southern region, following weeks of escalating clashes that shattered a four-year truce. - [2026-09-10 to 09-11] Houthi forces completed their takeover of Yemen's Red Sea coast, capturing Mokha, Perim Island and the Hanish Islands, per the Wikipedia "2026 in Yemen" timeline, an offensive gain that strengthens Houthi leverage in any ceasefire talks (https://en.wikipedia.org/wiki/2026_in_Yemen). - [2026-09-10] Reporting indicated Saudi Crown Prince Mohammed bin Salman called President Donald Trump twice on 10 September, urging him to launch strikes against the Houthis, but Trump rejected the request , and two U.S. officials said the US did not intend to directly intervene, per Axios reporting cited on Wikipedia's "2026 Yemen offensives" page. - [2026-09-17/18] Saudi Arabia, via Oman, proposed a two-week ceasefire and direct talks; per Al Akhbar reporting, the aim is first to discuss the Houthis' humanitarian demands and then attempt to reach a comprehensive agreement by the end of the ceasefire period, and the proposal was formulated after Saudi contacts with the US, Egypt, Pakistan, and Oman. Oman was tasked with delivering it to Sanaa (https://www.jpost.com/middle-east/article-909031). - [2026-09-17/18] As of this report, Sanaa has not yet provided a final response to the proposal, and the Houthis continue to demand a comprehensive settlement that includes an end to the war, the lifting of the blockade, and addressing humanitarian demands ; Saudi Arabia has not officially confirmed the proposal's details either (jpost.com/middle-east/article-909031). - [2026-09-17] Separately, a source said "Saudi Arabia confirmed that an agreement between the two sides regarding humanitarian issues will be officially announced within the proposed ceasefire period" , per Al Mayadeen reporting relayed via SBS — an unconfirmed, second-hand claim of Saudi intent, not a Houthi acceptance. - [2026-09-17] In parallel, secret talks were held over the weekend in Oman between US representatives and senior Houthi officials at the US Embassy in Muscat, in which the Houthis told the Americans they intended to continue honoring the 2025 ceasefire with Washington and not attack US vessels — this is a US-Houthi understanding, not a Saudi-Houthi one, and does not itself qualify under the market's resolution criteria. - [2026-09-21] Al Jazeera reporting (undated within last few days) notes Saudi Arabia requests missile defence support from allies as the US sees its own stock of interceptors dwindle , indicating Riyadh is still preparing for continued conflict even as ceasefire diplomacy proceeds (aljazeera.com/tag/houthis). - [ongoing] No joint or mirrored separate declarative announcements of a ceasefire agreement between Saudi Arabia and the Houthis have been identified as of 2026-09-22; only a reported unconfirmed proposal (still pending Houthi response) and unrelated US-Houthi assurances exist. BOTTOM LINE: As of September 22, 2026, active fighting is ongoing (Houthi territorial gains on the Red Sea coast, Saudi strikes, missile/drone attacks), and Saudi Arabia has floated a two-week ceasefire/negotiation proposal via Oman (reported ~Sept 17-18) to which the Houthis had not yet given a final response; no qualifying dated, mutually-announced ceasefire exists yet, and the trajectory (continued strikes, unmet Houthi demands over the blockade) suggests significant remaining distance to a formal agreement before October 31. NOT FOUND: Any official Saudi government (SPA) or Houthi leadership (SABA/Al Masirah) statement directly confirming acceptance or rejection of the September ceasefire proposal; any specific scheduled talks/summit dates before October 31; confirmation of the Al Mayadeen claim that a humanitarian agreement would be "officially announced" within the ceasefire period.

- [2026-09-18] Saudi Arabia reportedly conveyed via Oman a proposal for a two-week ceasefire and direct talks with the Houthis, aiming to reach a "comprehensive agreement" only "at the end of the ceasefire period" — i.e., a multi-step process, not an imminent deal, and Sanaa had "not yet provided a final response to the proposal" as of the report. https://www.jpost.com/middle-east/article-909031 - [2026-09-22] Polymarket's own market for "Saudi-Houthi ceasefire agreement announced by...?" currently prices the "October 31" bucket (i.e., by-Oct-31, matching this question's deadline) at only 18%, with the nearer "September 30" bucket at just 7%, implying the market itself sees this outcome as unlikely on this timeframe. https://polymarket.com/event/saudi-houthi-ceasefire-agreement-announced-by - [2022-04-01] The last major, durable Saudi/Yemen-Houthi ceasefire (the UN-brokered truce) took the UN Special Envoy's direct mediation to announce, and even then it required extensions and was not "one-shot" — showing that comparable formal, dated ceasefires historically emerge only after sustained, multi-month UN/Omani-mediated processes. https://arabcenterdc.org/resource/a-fragile-but-enduring-truce-in-yemen/ - [2022-10-02] That 2022 truce "could not be extended further" formally, yet in practice fighting stayed low for years — illustrating that "informal" de-escalation, which would NOT satisfy this market's strict definition, has historically been the more common outcome versus a formally announced, dated ceasefire agreement. https://arabcenterdc.org/resource/a-fragile-but-enduring-truce-in-yemen/ - [2023-04-01] Despite repeated high-profile visits (Saudi/Omani envoys to Sanaa in April 2023, a Houthi delegation to Riyadh in September 2023) and UN envoy Hans Grundberg calling it "the closest Yemen has been to real progress towards lasting peace," "no formal agreement materialized" from that round of diplomacy. https://arabcenterdc.org/resource/a-fragile-but-enduring-truce-in-yemen/, https://www.pressreader.com/usa/arkansas-democrat-gazette/20230410/281573769976056 - [2026-07-13] The prior Saudi-Houthi/Yemeni-government ceasefire (from 2022) collapsed after a Mahan Air incident at Sanaa airport, with Houthis declaring "the ceasefire with the Yemeni government and Saudi Arabia over," showing these arrangements can break down almost as fast as they form, and that the current environment starts from active war, not from a pre-existing truce. https://en.wikipedia.org/wiki/2026_Yemen_offensives - [2026-09-01] Since that collapse, the conflict has sharply escalated: Houthis have seized most of Yemen's west coast, declared a naval blockade of Saudi Arabia, and struck Saudi oil/Aramco infrastructure and airports; Saudi Arabia has responded with dozens of airstrikes — a level of active hostilities historically associated with a longer path to any dated ceasefire announcement. https://en.wikipedia.org/wiki/Houthi%E2%80%93Saudi_Arabian_conflict, https://en.wikipedia.org/wiki/2026_in_Saudi_Arabia - [2026-09-17] Separately, US officials reportedly met Houthi representatives in Oman and Washington decided "not to intervene to support Saudi Arabia," while Houthis promised only not to attack US vessels — a narrow, informal understanding that would not meet this market's bar for a "general pause" ceasefire between Saudi Arabia and the Houthis specifically. https://www.azernews.az/region/264050.html - [2026-09-14] A parallel congressional research summary notes "Saudi-Houthi talks, brokered by the UN Secretary-General's Special Envoy for Yemen, have continued in Amman, Jordan, but no new steps toward implementation" have occurred, reinforcing that talks-without-agreement is the modal outcome even amid active diplomacy. https://www.everycrsreport.com/reports/R48942.html - [2026-09-15] The UK parliamentary briefing describes the current trajectory as intensifying rather than de-escalating: "Intensifying violence in September has led to the first changes in frontline control since 2022 and the Houthis reportedly gaining strategic ports and islands," which historically correlates with delayed rather than accelerated ceasefire timelines. https://commonslibrary.parliament.uk/research-briefings/cbp-10427/ BOTTOM LINE: The reference class (2018 Hudaydah deal, 2022 UN truce, 2023 Riyadh/Sanaa talks) shows that formal, dated Saudi-Houthi ceasefires have historically taken many months to years of sustained mediation to materialize, with informal de-escalation or stalled talks being far more common than clean dated agreements within a ~6-week window; the market's own current pricing (~18% by Oct 31) is consistent with this low base rate, especially given the conflict is currently escalating rather than winding down. NOT FOUND: No systematic academic base-rate study of "time from ceasefire proposal to signed agreement" specific to Saudi-Houthi negotiations; no confirmation of any formal Saudi or Houthi acceptance statement as of 2026-09-22; could not verify a track record/calibration statistic for Polymarket's own historical accuracy on Yemen-specific ceasefire markets (only a generic 94% site-wide accuracy claim was found, not Yemen-specific).

- [2026-09-17] Saudi Arabia formally proposed via Oman a two-week ceasefire with the Houthis, explicitly intending to convey a message to the Houthis that it was interested in using the period of calm to "discuss addressing all humanitarian demands," and afterward "reach a comprehensive agreement at the end of the truce." Source (Al Akhbar reporting via Jerusalem Post): https://www.jpost.com/middle-east/article-909031 - [2026-09-17] A separate source described the proposal in more concrete terms, saying "Saudi Arabia confirmed that an agreement between the two sides regarding humanitarian issues will be officially announced within the proposed ceasefire period." Source: https://news.sbs.co.kr/english/article.do?news_id=N1008759204 - [2026-09-17] Oman — the traditional and trusted mediator between the two sides — was asked to deliver the ceasefire proposal to Sanaa, having played a central mediating role between Saudi Arabia and the Houthis in recent years , giving the initiative institutional credibility and a working channel. Source: https://www.jpost.com/middle-east/article-909031 - [2026-09-18/19] Parallel to Saudi outreach, the US held direct/secret contacts with Houthi officials in Muscat; the Houthis told the Americans that they intended to continue honoring the ceasefire reached with Washington in 2025 and that they did not intend to attack US vessels , showing the Houthis remain willing to negotiate and honor deals with at least one external power, a possible bridge to a Saudi deal. Source: https://www.jpost.com/middle-east/article-909031 - [2026-09-21] Trump reportedly aborted planned large-scale US strikes on the Houthis at the last minute, and Trump said Sunday that Washington maintains direct channels of communication with the Houthis and that the group had agreed not to engage US forces , reducing near-term risk of US military escalation that could derail Saudi-Omani mediation. Source: https://www.anews.com.tr/world/2026/09/21/trump-called-off-planned-us-strikes-on-houthis-at-last-minute-report - [2026-09-21] The Houthis reaffirmed non-aggression toward US assets: Yemen's Houthis have assured Washington that they would not attack US vessels in the Red Sea, following reports that the US cancelled its planned strikes on the group at the last minute , indicating a degree of diplomatic flexibility that could extend to Saudi Arabia under sufficient pressure. Source: https://www.euronews.com/2026/09/21/yemens-houthis-pledge-not-to-target-us-ships-after-trump-cancels-strikes - [2026-09-20] A conflict-tracking briefing noted regional actors (Turkiye, China, Pakistan) are pressing for de-escalation: China and Pakistan each pressed Iran to use its influence to restrain the Houthis, while Türkiye said it had conveyed proposals intended to end the fighting , indicating multiple diplomatic tracks converging toward a truce beyond just the Saudi-Oman channel. Source: https://thotharis.substack.com/p/briefing-note-3-yemen-20-september - [2026-09-18] Saudi Arabia's motivation for a deal is explained by an analyst as tactical: "Saudi Arabia's latest move shows that after failing to build an alliance against SANA (the area controlled by Houthi rebels), it has ultimately turned to the option of a ceasefire." This suggests Riyadh has shifted strategy from military coalition-building to active diplomacy, a necessary precondition for any announced deal. Source: https://news.sbs.co.kr/english/article.do?news_id=N1008759204 - [2026-09-17] Historical precedent exists for exactly this dynamic resolving into an announced ceasefire: Oman-mediated Saudi-Houthi contacts have previously produced concrete outcomes, including a 2023 case where a Saudi-Omani delegation is planning to travel to Yemen's capital Sana'a next week to hash out a permanent ceasefire deal with Houthi officials... Yemen's warring parties could announce an agreement before Eid holiday , showing this channel has a track record of producing near-term ceasefire announcements once talks reach an advanced stage. - [2026-09-21] Polymarket's own market summary frames the state of play: Saudi Arabia proposed a two-week ceasefire through Oman to address humanitarian issues before broader talks , with a live process ongoing (not yet accepted, but not rejected either) as of the fetch date. Source: https://polymarket.com/event/saudi-houthi-ceasefire-agreement-announced-by BOTTOM LINE: The single most plausible path to YES is the active Saudi-Omani two-week ceasefire initiative launched around September 17-18, 2026, which if accepted by the Houthis (talks were meant to conclude around end of September/early October) and formally announced by both sides, would land squarely within the October 31 deadline; parallel US-Houthi de-escalation and Trump's decision to hold off on strikes reduce a key spoiler risk, giving diplomacy room to work. NOT FOUND: No confirmed Houthi acceptance or formal joint/parallel announcement of a ceasefire as of September 22, 2026; no official Saudi government or Houthi leadership statement confirming the Al Akhbar-reported two-week ceasefire proposal; no confirmed date for a Sanaa or Riyadh meeting to finalize a deal.

- [2026-07-13] The 2022 UN-brokered ceasefire, which had "largely held" for years, collapsed after a Sanaa airport strike; the Houthis and the internationally recognized government of Yemen reached a ceasefire agreement in 2022, which largely held until the 2026 campaign, and the Houthis declared the ceasefire with the Yemeni government and Saudi Arabia over after the airport strike incident. This shows the prior ceasefire framework has already broken down and active war has resumed. - [2026-07-20] The Houthis declared a blockade of Saudi Arabian ports and ships in the Bab-el-Mandeb. Since then Houthi forces have struck Saudi tankers, oil infrastructure, and Aramco facilities, indicating a hardened military posture rather than a de-escalatory trajectory. - [2026-09-03] The Houthis launched an offensive against the Saudi-backed Presidential Leadership Council, with clashes beginning in Taiz Governorate and prompting a PLC counter-offensive in Al-Jawf and Al-Bayda governorates. This marks the "deadliest fighting in Yemen since the collapse of the 2022 ceasefire," per Wikipedia's tracker, indicating momentum is toward continued war, not a negotiated pause. - [2026-09-08] The Houthis launched a barrage of strikes against Saudi Arabia, alleging Saudi involvement in the counteroffensive, with widespread civilian injuries in Saudi Arabia (73 or more civilians injured). Direct Saudi-Houthi military engagement is intensifying, the opposite of ceasefire conditions. - [2026-09-10] Axios reported that Saudi Crown Prince Mohammed bin Salman called President Donald Trump twice... urging him to launch strikes against the Houthis, but that Trump rejected the request, and Two U.S. officials said the US did not intend to directly intervene at the time. This shows Riyadh is still oriented toward seeking military escalation/support rather than a negotiated ceasefire. - [2026-09-11 to 13] The Houthis captured further Red Sea coastal territory including Mokha, Dhubab, Perim Island, and the Hanish Islands, giving them control of virtually the entire Yemeni west coast except Midi district — a battlefield momentum that reduces the Houthis' incentive to freeze the front lines via a ceasefire (https://en.wikipedia.org/wiki/2026_Yemen_offensives). - [2026-09-17] Saudi Arabia has requested that Oman mediate a two-week ceasefire with Yemen's Houthis, seeking to discuss all "humanitarian" demands and potentially announce an agreement at the end of that period. This is only a proposal transmitted via a third party (Oman) and reported by a Hezbollah-affiliated outlet (Al Akhbar) — not a confirmed bilateral agreement. - [2026-09-18] Per the Jerusalem Post's report on the same proposal: Sanaa has not yet provided a final response to the proposal, and the Houthis continue to demand a comprehensive settlement that includes an end to the war, the lifting of the blockade, and addressing humanitarian demands. No Houthi acceptance has been confirmed as of the most recent reporting. - [2026-09-18] At this stage, Saudi Arabia has also not officially confirmed the details of the proposal published by the Lebanese newspaper. Riyadh itself has not officially confirmed even making the offer, let alone secured Houthi acceptance — this is far below the market's bar of a "declarative statement that clearly and unambiguously communicates acceptance." - [Historical precedent, 2021] A near-identical pattern occurred in March 2021: Riyadh publicly offered a comprehensive ceasefire, but the response from the Iranian-backed rebel movement was swift and dismissive... the Houthis said the proposal provided "nothing new," as it does not include a complete lift of the blockade on Sanaa's airport or the port city of Hodeidah. Saudi ceasefire offers have repeatedly been rejected or stalled by Houthi maximalist demands historically, a pattern now repeating with the 2026 blockade/humanitarian demands. - [Structural point] The current fighting involves multiple linked fronts — Houthi-PLC ground war, Houthi-Saudi missile/drone exchanges, and the broader Iran-linked regional conflict — meaning a "general pause in the conflict" (as the resolution criteria requires, excluding partial/category-specific arrangements) would need to resolve overlapping military tracks simultaneously, a higher bar than a simple bilateral truce. - [Resolution-criteria technicality] The rules require declarative, unambiguous acceptance by "all listed countries" of the "same qualifying diplomatic agreement," with a specified effective date, and explicitly exclude "agreements that outline future negotiations or de-escalation measures without an explicit, dated commitment to stop fighting." The reported Saudi proposal is structured as a preliminary two-week humanitarian-talks ceasefire meant to lead to a "comprehensive agreement... at the end of the truce" — i.e., a process rather than a finalized, mutually accepted ceasefire, which as of now would likely fail this bar even if only partially confirmed. BOTTOM LINE: As of September 18-22, 2026, only a one-sided, unconfirmed Saudi proposal (via Oman, reported by third-party media) exists; Houthi leadership has not accepted it and is demanding a broader settlement, while active large-scale fighting, blockade, and territorial gains by the Houthis continue — mirroring a 2021 pattern where similar Saudi ceasefire offers were rejected. Given the six-week window to October 31, the active war footing, unmet Houthi maximalist demands, and the stringent "declarative, dated, mutual" resolution bar, the weight of evidence favors NO. NOT FOUND: No official Saudi government statement or Houthi (Ansar Allah/Supreme Political Council) statement confirming acceptance of any ceasefire proposal was found; no dated, mutually announced ceasefire terms were located as of the latest available reporting (September 18-22, 2026).