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Pedro Sánchez out as PM of Spain by December 31, 2026?

polymarketElections·2026-10-07·view on polymarket ↗
28%
Agent
30%
Market Price
-1.9%
Edge
62%
Confidence
385,949
Volume
1.0c
Spread
85
Days to resolution
2
Markets in event
final rationale
Mean of 5 draws (0.25, 0.26, 0.29, 0.29, 0.28). (0) Not met: La Moncloa and Oct 5-6 reporting show Sánchez dissolved the Cortes but did not resign; he remains PM, then caretaker under Art. 101 until a successor is invested. (a) About 12 weeks remain; the new Cortes convene 23 December by decree, leaving roughly 8 days, including Christmas, for consultations and an investiture vote. (b) Status quo: Sánchez is still PM (caretaker) on 31 December, so NO. (c) NO: PP+Vox win but negotiations and consultations push investiture into January, as in 2019 and as some Spanish press calendars project, or a fragmented result drags formation out. (d) YES: a clear PP+Vox majority (Sigma Dos 203 seats, Ateneo del Dato 191-212) enables a 2011-style quick investiture around 28-30 December, or Sánchez announces he is stepping aside after a heavy defeat, which triggers YES on announcement alone. I put a PP+Vox majority at ~60-65% and a vote passing by year-end, given a majority, at ~25-30%, plus ~7-9% for a resignation announcement or ambiguous resolution. That gives ~0.25, slightly under the 29.5% market anchor.
price vs. prediction
market price agent forecast at t+0
11 follow-ups
1. Planner Opus 5.5 · picks the research tools
Tools chosen: polymarket_direct resolution_source polymarket_related kalshi_related wikipedia gdelt_news
Planner reasoning
This is a Polymarket question about whether Sánchez leaves office, so polymarket_direct is the price anchor, with related Polymarket and Kalshi markets as cross-venue checks (Spanish snap election, Sánchez exit). Wikipedia gives structured background on Sánchez's government and any 2026/2027 election timing. GDELT adds Spanish-language headline coverage, for example of censure motions or budget failures, that the curated corpus may miss.
2. Research parallel tool calls + 4 web research loops (Sonnet 5) · read raw by the forecasters
at a glance
RESEARCH DIGEST (built in code: tool summaries and each report's bottom line; the forecasters read the full tool outputs and reports) Tools - polymarket_direct: ## This Market's Polymarket Data **Pedro Sánchez out as PM of Spain by December 31, 2026?** - Current price (probability): 29.50% (live; bid 29% / ask 30%) - 7-day price change: +15.50% - 30-day price change: +13.50% - Total volume: $385,949 (USD notional) - Price range: 9.50% - 29.50% - Data points: 90 days - resolution_source: already_resolved=unclear; matches_criteria=True; last_updated=unknown. The official La Moncloa website shows Pedro Sánchez actively performing his duties as President of the Government (Prime Minister), including activity listings, cabinet meetings, and agenda items for government ministers, with no indication of resignation or removal. NOTE: The page shows current/ongoing activity of Pedro Sánche - polymarket_related: Polymarket search over 3 keyword(s), kept 15 matches. keyword 'Sánchez': 5 markets | keyword 'Spain election': 5 markets | keyword 'Spanish snap election': 5 markets - kalshi_related: 2 related markets / summaries. keyword 'Spain prime minister': ok | keyword 'Sanchez': no matches | keyword 'Spain election': ok - wikipedia: Fetched 3 Wikipedia entries (0 missing pages). - gdelt_news: GDELT: 20 articles across 3 queries (lookback=30d). 'Pedro Sánchez moción de censura': 10 hits | 'Sánchez elecciones anticipadas': error GDELT rate-limited after retries (429) | 'Sánchez dimisión': 10 hits Research loops, bottom lines - current state: Sánchez has called a snap election for November 29, 2026, but under Spanish constitutional procedure he remains the sitting (and, after the vote, caretaker) Prime Minister throughout the campaign and until a new government is sworn in; unfavorable polling raises the odds he eventually loses power, but given typical post-election investiture timelines in Spain (which have taken weeks to months in 2016, 2019, 2023), a change of PM being finalized before December 31, 2026 is far from certain even i - base rate: Spain's historical base rate strongly favors sitting PMs surviving — only 1 of 6 no-confidence motions in democratic history succeeded, both motions against Sánchez himself failed heavily, and Sánchez has twice talked publicly of resigning (2024) without doing so; separately, post-election government formation in Spain has historically taken 2–4+ months (sometimes up to 10 months), so even the newly confirmed 29 November 2026 snap election is unlikely by outside-view timing to produce a sworn-in - yes case: The single most likely YES path is a clear PP+Vox majority (now shown in multiple October polls above the 176-seat threshold) producing a fast, 2011-style investiture of Feijóo before 31 December, or alternatively an early concession/resignation announcement by Sánchez once such a result is confirmed on election night (29 Nov) or at the Dec 23 chamber constitution — both of which are mechanically possible within the remaining calendar, as the 2011 Rajoy precedent shows a 31-day election-to-PM tu - no case: Spanish constitutional procedure (Art. 68 and Art. 99) and the government's own published calendar place the earliest possible Congress constitution at 23 December 2026 and make any investiture vote before 31 December at best a tight, uncertain possibility — historical precedent (2019, 2023) and explicit Spanish-press calendar analysis point to investiture realistically landing in January 2027, well after the market's deadline, so under the literal "ceases to be PM" resolution criteria the stron
tools
toolstatustimeitemssummary
polymarket_direct OK 0.3s 1 ## This Market's Polymarket Data **Pedro Sánchez out as PM of Spain by December 31, 2026?** - Current price (probability): 29.50% (live; bid 29% / ask 30%) - 7-day price change: +15.50% - 30-day price change: +13.50% - Total volume: $385,949 (USD notional) - Price range: 9.50% - 29.50% - Data point
resolution_source OK 6.6s 1 already_resolved=unclear; matches_criteria=True; last_updated=unknown. The official La Moncloa website shows Pedro Sánchez actively performing his duties as President of the Government (Prime Minister), including activity listings, cabinet meetings, and agenda items for government ministers, with no
polymarket_related OK 0.4s 15 Polymarket search over 3 keyword(s), kept 15 matches. keyword 'Sánchez': 5 markets | keyword 'Spain election': 5 markets | keyword 'Spanish snap election': 5 markets
kalshi_related OK 4.7s 2 2 related markets / summaries. keyword 'Spain prime minister': ok | keyword 'Sanchez': no matches | keyword 'Spain election': ok
wikipedia OK 0.2s 3 Fetched 3 Wikipedia entries (0 missing pages).
gdelt_news OK 147.1s 20 GDELT: 20 articles across 3 queries (lookback=30d). 'Pedro Sánchez moción de censura': 10 hits | 'Sánchez elecciones anticipadas': error GDELT rate-limited after retries (429) | 'Sánchez dimisión': 10 hits
research loops · 4/4 ok · 16 searches · 5 page reads
dimensionstatustimesearchespage readsreport
current state OK 34s 4 2 5551 chars
base rate OK 50s 5 1 5383 chars
yes case OK 44s 4 1 5235 chars
no case OK 34s 3 1 5933 chars
report: current state
- [2026-10-05] Spanish PM Pedro Sánchez announced a snap general election after Congress rejected his government's two housing-relief decrees; Spain's Prime Minister Pedro Sánchez has called an early general election for 29 November, after Congress rejected two housing decrees put forward by his government, with the lower house voting down the measures on Friday . https://www.euronews.com/2026/10/05/pedro-sanchez-calls-early-elections-in-spain-after-defeat-of-housing-decrees - [2026-10-05] The election is scheduled for November 29, and will come roughly eight months earlier than originally planned. This is well within the market's October–December window but the vote itself does not equal Sánchez ceasing to be PM. https://www.washingtontimes.com/news/2026/oct/5/spanish-prime-minister-pedro-sanchez-calls-early-elections-aiming/ - [2026-10-06] Spanish legal/constitutional explainer confirms according to procedures and regulations in Spain, the prime minister does not resign upon calling early elections, since he could stand again, and in fact continues being president and leads the Government during the whole electoral period . https://www.eleconomista.es/actualidad/noticias/14018685/10/26/ni-dimite-ni-renuncia-pedro-sanchez-disuelve-las-cortes-generales-en-que-consiste.html - [2026-10-06] Same source notes that after the election the Government ceases, but even then they do not stop being in charge, since the outgoing Government remains in a caretaker capacity until the new Government takes office, per Article 101 of the Constitution . This means Sánchez legally continues as PM (at minimum in caretaker role) well past Nov 29 into whatever transition period follows. https://www.eleconomista.es/actualidad/noticias/14018685/10/26/ni-dimite-ni-renuncia-pedro-sanchez-disuelve-las-cortes-generales-en-que-consiste.html - [2026-10-06] A separate outlet confirms Pedro Sánchez is not yet heading a caretaker ("en funciones") government; that situation will only begin after the November 29 elections , and until then the Government continues exercising its powers in full, with the Council of Ministers still able to meet and approve measures . https://www.estrelladigital.es/articulo/espana/sanchez-gobierno-funciones-29n-decretos-leyes/20261006060000451844.html - [2026-10-06] Background pressures cited for the snap vote include a housing crisis sparked by a viral eviction case, a migration crisis in Ceuta, and ongoing corruption cases touching Sánchez's inner circle (wife, brother, and a former PSOE PM), though Sánchez has a reputation as a political survivor who relishes the electoral gambit . https://abcnews.com/International/wireStory/pedro-snchezs-bid-turn-spains-housing-crunch-electoral-137040710 - [2026-10-06] AP reporting notes Carles Puigdemont's arrest warrant was lifted by a judge, clearing a path for his return to Spain, injecting a new variable into the pre-election period but not changing Sánchez's current office-holding status. https://abcnews.com/International/wireStory/pedro-snchezs-bid-turn-spains-happen (see ABC News fetch above) - [2026-10-05] Polling released around the election call is unfavorable to Sánchez's bloc: Pedro Sánchez has moved the general elections to November 29 and the polls point to the same scenario: the PP would win and, with Vox, would surpass the 176 seats of absolute majority , with the CIS (public pollster) as the main exception favoring PSOE. https://www.hoyaragon.es/espana/encuestas-elecciones-generales/20261005100913148168.html - [2026-10-05] Private pollsters project a PP–Vox majority exceeding 200 seats combined, implying Sánchez would have difficulties assembling a majority that would allow him to continue in La Moncloa if these polls hold. https://www.noticiasdenavarra.com/politica/2026/10/05/parte-ventaja-elecciones-29-n-11618335.html - [2026-06-25] Earlier in 2026, Congress passed a non-binding motion demanding Sánchez's resignation amid corruption scandals; Congress, by absolute majority, formally demanded Sánchez's resignation and the calling of immediate general elections, making him the first Spanish president to continue governing after losing the explicit confidence of the chamber that elected him . This motion was politically symbolic and non-binding, and Sánchez did not resign at that time. https://www.elespanol.com/espana/politica/20260625/sanchez-convierte-primer-presidente-sigue-gobernando-exigir-dimita-mayoria-congreso/1003744300032_0.html - [2026-10-07 implied, from Oct 5-6 reporting] As of today Sánchez remains in full, non-caretaker office as PM, having dissolved the Cortes but not resigned; the election is set for Nov 29, with results and government formation negotiations expected to extend into December 2026 or beyond. BOTTOM LINE: Sánchez has called a snap election for November 29, 2026, but under Spanish constitutional procedure he remains the sitting (and, after the vote, caretaker) Prime Minister throughout the campaign and until a new government is sworn in; unfavorable polling raises the odds he eventually loses power, but given typical post-election investiture timelines in Spain (which have taken weeks to months in 2016, 2019, 2023), a change of PM being finalized before December 31, 2026 is far from certain even if PP/Vox win a majority. NOT FOUND: No confirmed date for a post-election investiture vote or swearing-in of a successor; no indication of any resignation, detention, incapacitation, or no-confidence vote succeeding against Sánchez as of October 7, 2026.
report: base rate
- [2026-10-05] Sánchez dissolved parliament and called a snap general election for 29 November 2026, after his housing-relief decrees were defeated in Congress (Junts siding with PP and Vox). The dissolution decree starts a 54-day countdown to the vote, but the dissolution of the Cortes does not mean the executive immediately becomes a caretaker government; that would happen after the elections . https://www.heraldousa.com/latestnews/2026/10/4/pedro-sanchez-could-dissolve-parliament-and-call-early-elections-100876.html - [Base rate - no-confidence motions] Spain has had six national no-confidence motions since 1978; only one succeeded (against Rajoy in 2018, which made Sánchez PM). There have been a total of six motions of no confidence in the Congress of Deputies against the presidents Suárez (1980), González (1987), Rajoy (2017 and 2018), Sánchez (2020, 2023). Only one of them was successful. Both motions against Sánchez himself (2020, 2023) failed by wide margins. https://en.wikipedia.org/wiki/Motions_of_no_confidence_in_Spain - [2026-06-25] A non-binding opposition motion urging Sánchez to resign or call a confidence vote passed Congress 178-171 with Junts, PP and Vox aligned, but the resolution is not legally binding and does not require Sánchez to act on it... Under Spain's constitution, only the prime minister can call a vote of confidence. A motion of no confidence, if formally tabled and passed, would be the only mechanism capable of forcing a change of government. No binding no-confidence motion has been tabled since. https://euroweeklynews.com/2026/06/25/spanish-parliament-backs-motion-urging-pedro-sanchez-to-resign-or-call-confidence-vote/ - [2024-04-29] In the only comparable "resignation scare," after his wife's corruption probe, Sánchez shocked the country announcing he was taking five days off to think about his future, then said he would continue in office "even with more strength." This pattern (threatened resignation, then staying) has recurred without an actual exit. https://www.euronews.com/my-europe/2024/04/29/will-spains-prime-minister-pedro-sanchez-announce-his-resignation - [Base rate - government formation duration] Historical Spanish investitures after an election take weeks to months, not days: 2023 formation took 116 days until the next government could be sworn in (24 Jul–16 Nov); 2019 cycle took from April to January 2020; 1996 took two months; 2015-16 took over 10 months and required a repeat election. https://en.wikipedia.org/wiki/2023_Spanish_government_formation ; https://en.wikipedia.org/wiki/2015%E2%80%932016_Spanish_government_formation - [Constitutional mechanics] If within two months after the first vote for investiture no candidate has obtained the confidence of Congress, the King shall dissolve Congress and call new elections — meaning even a contested post-election process can legally run close to two months before any resolution, let alone formation of a government. https://en.wikipedia.org/wiki/2023_Spanish_government_formation - [2026-10-05] Polling cited around the dissolution showed no clear majority, with polls show that, were the election held today, the right-wing Popular Party (PP) and the neo-fascist Vox party would win , implying a plausible but uncertain path to a change of PM, not a guaranteed one, and any change would still require a post-election investiture process. https://www.wsws.org/en/articles/2026/10/06/itla-o06.html - [Historical analogue] Sánchez himself took office only via the rare successful 2018 no-confidence motion, and even then Sánchez became an unlikely prime minister when he became the first politician to successfully pull off a no-confidence motion to replace the sitting prime minister , an outcome enabled by overwhelming cross-party alignment, something not currently replicated against Sánchez (PP+Vox+Junts can pass symbolic motions but have not combined to file a binding no-confidence motion with an agreed alternative candidate). https://abcnews.com/International/wireStory/pedro-snchezs-bid-turn-spains-housing-crunch-electoral-137040710 - [2026-10-05] Sánchez remains in office in a transitional capacity through the election; news coverage frames the vote as his bid to "renew people's support," not as a resignation: Sanchez said on Monday the vote would take place on November 29. "We need to renew people's support," he said in a televised address. https://www.aljazeera.com/news/2026/10/5/spanish-prime-minister-pedro-sanchez-announces-snap-election BOTTOM LINE: Spain's historical base rate strongly favors sitting PMs surviving — only 1 of 6 no-confidence motions in democratic history succeeded, both motions against Sánchez himself failed heavily, and Sánchez has twice talked publicly of resigning (2024) without doing so; separately, post-election government formation in Spain has historically taken 2–4+ months (sometimes up to 10 months), so even the newly confirmed 29 November 2026 snap election is unlikely by outside-view timing to produce a sworn-in successor before the 31 December 2026 deadline. NOT FOUND: No confirmed binding motion of no confidence currently tabled against Sánchez; no official Polymarket/other-venue odds figures found that are not this contract itself; no evidence of health incapacity, criminal detention, or other extra-electoral removal mechanism in progress.
report: yes case
YES means: Pedro Sánchez ceases to be Prime Minister of Spain (resigns, is removed, replaced after investiture, or otherwise stops holding/exercising the office) at any point between Dec 3, 2025 and Dec 31, 2026. - [2026-10-05] Sánchez confirmed the snap election for 29 November 2026 and the government decree sets the new Congress/Senate's constitutive session for 23 December 2026, the latest constitutionally allowed date under Art. 68 (25 days post-election, which falls on 24 December). This is a date the government itself chose, leaving one week before year-end for a possible investiture attempt. https://www.telecinco.es/noticias/espana/20261005/fechas-electorales-clave-cuando-constituiran-constitucion-nuevas-cortes-investidura_18_020356270.html - [2026-10-05] Spanish legal explainer confirms that after the new Congress convenes, "if pacts are reached" following chamber formation, "the investiture debate could take place before 25 December" — i.e., there is a legally live, if tight, path to an investiture vote before the market's 31 December deadline, not just a January-or-later scenario. https://www.libertaddigital.com/espana/2026-10-05/cuenta-atras-para-el-29-n-el-calendario-que-decidira-el-futuro-politico-de-espana-7470269/ - [2011-12 precedent] The closest real-world analogue — Spain's last snap election producing a clear majority — ran on almost the identical calendar: election 20 November 2011, Congress constituted 13 December, investiture debate 19–20 December, Rajoy sworn in before the king 21 December, cabinet sworn in 22 December — a total of 31 days from vote to a new PM in office. An election-to-NewYear window of equal length (29 Nov–31 Dec is 32 days) is therefore not mechanically too short if a single pre-agreed majority exists. https://es.wikipedia.org/wiki/X_legislatura_de_Espa%C3%B1a - [2026-10-04] A flash poll by Ateneo del Dato for elDiario.es put PP at 33.2% and Vox at 19.2%, giving the two parties a combined 52.4% of vote share and a projected 191–212 seats — comfortably above the 176-seat absolute-majority threshold in the 350-seat Congress. https://www.que.es/2026/10/04/encuesta-pp-vox-mayoria-absoluta/ - [2026-10-05] A separate Sigma Dos poll for El Mundo projected PP at 140 seats and Vox at 63, for a combined 203 seats, again clearing the 176-seat majority mark and matching the kind of single-bloc dominance that allowed Rajoy's fast 2011 investiture. https://www.democrata.es/encuestas/elecciones-generales/encuesta-elecciones-generales-pp-vox-superan-mayoria-absoluta/ - [2026-10-04] An earlier flash poll cited by El Español found the sum of all parties that invested Sánchez in 2023 would fall to just 143 seats, equal to the PP's own projected total, underscoring that Sánchez's governing coalition (PSOE, Sumar, ERC, Bildu, PNV, Junts) looks mathematically incapable of reconstituting a majority under current polling, unlike 2023 when it narrowly succeeded. https://www.elespanol.com/espana/politica/20261004/sondeo-expres-sanchez-disuelve-congreso-pp-hoy-diputados-psoe-vox-sumar/1003744408026_0.html - [2026-10-07] PP leader Feijóo is already campaigning as the presumptive next PM, pledging Ceuta will be "the first file on the Council of Ministers' desk" if he wins, and the PNV has publicly been pressed on whether it would back a Feijóo investiture, indicating opposition parties are already positioning for a post-election PP-led government rather than treating the election as merely symbolic. https://www.elespanol.com/espana/politica/20261007/ultima-hora-politica-directo-feijoo-viaja-quinta-vez-ceuta-arrancar-precampana-electoral-reafirmar-apoyo-vivas/1003744411203_10.html - [Mechanism] Even absent a completed investiture before 31 December, the resolution criteria state an "announcement of resignation... before this market's end date will immediately resolve this market to Yes, regardless of when the announced resignation goes into effect" — meaning if Sánchez, facing a clear PP–Vox majority and mounting corruption pressure on his inner circle (per the Oct 6 reports), publicly concedes or announces he will step aside once a government is formed, that announcement alone — not the actual swearing-in — would trigger YES, a materially lower bar than full government formation. BOTTOM LINE: The single most likely YES path is a clear PP+Vox majority (now shown in multiple October polls above the 176-seat threshold) producing a fast, 2011-style investiture of Feijóo before 31 December, or alternatively an early concession/resignation announcement by Sánchez once such a result is confirmed on election night (29 Nov) or at the Dec 23 chamber constitution — both of which are mechanically possible within the remaining calendar, as the 2011 Rajoy precedent shows a 31-day election-to-PM turnaround is achievable when one bloc has an outright majority. NOT FOUND: No poll of polls/aggregator confirming PP+Vox majority is the consensus (CIS, the public pollster, still favors PSOE per prior reports); no confirmation Feijóo or PP has a signed pre-election pact with Vox guaranteeing an immediate joint investiture bid; no statement from Sánchez indicating he would resign or concede before an investiture vote even if PP+Vox win.
report: no case
YES means: Pedro Sánchez ceases to be Prime Minister of Spain (resigns, is removed, is detained/incapacitated, or an announced resignation/removal occurs) at any point between market creation (2025-12-03) and 2026-12-31. - [2026-10-05] Sánchez dissolved the Cortes and called the snap election for 29 November, but the decree is a standard dissolution; the President of the Government made an institutional statement announcing the election, published in the Official State Gazette , with no resignation language — Sánchez remains sitting PM. https://www.lamoncloa.gob.es/lang/en/presidente/news/Paginas/2026/20261005-institutional-statement.aspx - [2026-10-05] Constitutional Article 68 requires the new Congress and Senate to be constituted within 25 days of the election, which stipulates that the Congress and Senate must be constituted within 25 days of the elections, setting the deadline as 24 December , and the government has fixed the constitutive session for 23 December 2026 — one day before that deadline, and just 8 days before the market's resolution date. https://www.libertaddigital.com/espana/2026-10-05/cuenta-atras-para-el-29-n-el-calendario-que-decidira-el-futuro-politico-de-espana-7470269/ - [2026-10-05] Only after the chamber convenes does the King begin consultations, and once the constitutive session is complete, King Felipe VI will hold a round of consultations with parliamentary forces to propose a candidate for PM; if pacts are reached, the investiture debate could be held before 25 December — meaning a first investiture vote, if attempted at all, is realistically only possible in the final week of the year and only "could" happen, not "will." - [2026-10-05] Even an attempted first-round investiture vote by 25 December would not guarantee a new PM: the investiture procedure contemplates two Congress votes: first requiring absolute majority, with a second vote 48 hours later requiring only a simple majority , and if the candidate is not elected in the first vote, the two-month period under Article 99.5 is automatically triggered, after which the King would dissolve the Cortes and call new elections if no candidate secures confidence — a mechanism that can stretch the process well past December 31 regardless of election outcome. - [2026-10-06] Spanish legal explainers confirm the caretaker-but-still-PM status persists indefinitely until a successor is sworn in: in the November 2019 general election, the Cortes were not constituted until early December and the investiture had to wait until January, with a caretaker government for weeks , showing that a late-November vote under similar calendar pressure historically pushed any new PM's swearing-in into January of the following year. - [2026-10-05] Reporting on the current cycle draws this exact parallel explicitly: a news analysis states the Cortes' constitutive session will be held around mid-December, with the investiture not calculated before January according to that same calendar , directly implying the formal change-of-PM would land in January 2027, after the market's deadline. - [2026-10-07] Historical base rates for Spanish government formation after an election strongly favor delays beyond two months: the 2023 cycle took 116 days until the next government could be sworn in , and the 2019 cycle stretched 29 April 2019 – 7 January 2020 (8 months, 1 week and 2 days) ; even the fastest realistic outcome under the current compressed calendar would require an unusually swift post-election pact, which has not historically occurred when the vote falls so close to year-end. - [2026-10-06] Even if PP and Vox secure a majority, as current private polling suggests (already noted in prior reports), this does not accelerate the constitutionally fixed timeline: the Congress has 350 seats, so absolute majority requires 176 deputies; if the candidate fails to reach that, a second vote is held 48 hours later requiring only a simple majority — a mechanism that still cannot complete before the chamber is even constituted on 23 December, leaving at most 8 days in the entire window for any investiture process to conclude. - [2026-10-06] Potential coalition friction adds further delay risk: a report on Junts notes the 29N will force all parliamentary math to be redone from scratch; it cannot be assumed Junts will again hold the key to an investiture, nor that it has definitively lost that capacity , and separate reporting cites Junts figures as skeptical of ever again backing Sánchez — meaning even a Sánchez-led coalition renewal, let alone a PP/Vox transition, could face prolonged negotiation rather than a swift December resolution. - [2026-06-25 base, reaffirmed] No binding no-confidence motion is currently tabled against Sánchez, and Spain's historical base rate (previously noted: 1 of 6 such motions ever succeeded) means an extra-electoral forced removal before December 31 remains a low-probability tail event absent new developments. BOTTOM LINE: Spanish constitutional procedure (Art. 68 and Art. 99) and the government's own published calendar place the earliest possible Congress constitution at 23 December 2026 and make any investiture vote before 31 December at best a tight, uncertain possibility — historical precedent (2019, 2023) and explicit Spanish-press calendar analysis point to investiture realistically landing in January 2027, well after the market's deadline, so under the literal "ceases to be PM" resolution criteria the strongest case is that Sánchez remains PM (at minimum via Article 101 caretaker status) through December 31, 2026. NOT FOUND: No official royal-palace announcement yet of the exact consultation/investiture dates (these depend on post-election results not yet known); no confirmed PP-Vox-Junts pact guaranteeing a fast first-round investiture before 25 December; no binding no-confidence motion currently filed against Sánchez.
3. Forecasters 5 draws · Opus 5.5 + GPT-6 Astra + GPT-5.6 Sol · plain mean
claude-opus-5-5 · high effort
55% conf
Yes 25%
No 75%
(0) Not met: La Moncloa and Oct 5-6 reporting show Sánchez dissolved the Cortes but did not resign; he remains PM, then caretaker under Art. 101 until a successor is invested. (a) About 12 weeks remain; the new Cortes convene 23 December by decree, leaving roughly 8 days, including Christmas, for consultations and an investiture vote. (b) Status quo: Sánchez is still PM (caretaker) on 31 December, so NO. (c) NO: PP+Vox win but negotiations and consultations push investiture into January, as in 2019 and as some Spanish press calendars project, or a fragmented result drags formation out. (d) YES: a clear PP+Vox majority (Sigma Dos 203 seats, Ateneo del Dato 191-212) enables a 2011-style quick investiture around 28-30 December, or Sánchez announces he is stepping aside after a heavy defeat, which triggers YES on announcement alone. I put a PP+Vox majority at ~60-65% and a vote passing by year-end, given a majority, at ~25-30%, plus ~7-9% for a resignation announcement or ambiguous resolution. That gives ~0.25, slightly under the 29.5% market anchor.
claude-opus-5-5 · high effort
55% conf
Yes 26%
No 74%
(0) The condition has not been met. La Moncloa shows Sánchez acting as full PM. He dissolved the Cortes on Oct 5 and called an election for Nov 29 without resigning, and Spanish law keeps him PM, in a caretaker role after the vote, until a successor is sworn in. (a) About 12 weeks remain until Dec 31, 2026. The government has fixed the new Cortes' constitutive session for Dec 23, which leaves roughly 8 days, including Christmas, for royal consultations and an investiture vote. (b) If nothing changes, Sánchez is still PM, possibly caretaker, on Dec 31, and the market resolves No. (c) No scenario: PP and Vox win but negotiate over cabinet seats, or the King's consultations run past Christmas. The investiture then slips to January, as Spanish press calendar analyses already project and as in 2019 and 2023. Alternatively the result is fragmented and formation drags on for months. (d) Yes scenario: PP and Vox clear 176 seats, as several October private polls show with 191 to 212 seats, though the CIS dissents. They pre-agree a deal and run a 2011-style rapid investiture, Rajoy's taking 6 days from constitution to vote, so Feijóo is sworn in around Dec 29-30. A second route is Sánchez announcing after a heavy defeat that he is stepping aside, which the resignation-announcement clause would count. I put the odds of a PP+Vox majority at about 70% and a completed pre-New Year investiture given that at about 25-30%. Adding a small resignation-announcement tail gives roughly 25%, slightly below the 29.5% market, which may be over-reacting to the snap-election headline.
gpt-6-astra · high effort
66% conf
Yes 30%
No 70%
The condition is not documented as met: La Moncloa’s October 5 statement announces an election, not a resignation, while its homepage shows Sánchez performing his duties, although its unknown update date creates some source-lag uncertainty. Roughly 85 days remain until December 31 ET, and the November 29 election leaves only 32 days for a qualifying departure or announcement. I retain Polymarket’s 29.5% Yes anchor, already up 15.5 percentage points over seven days, because the research does not establish a clear informational advantage over that repricing. If nothing changes, No wins: parliament’s dissolution and subsequent caretaker service do not themselves mean Sánchez stops serving as PM. A plausible No scenario is an opposition victory followed by coalition negotiations and investiture extending into January, especially with Congress reportedly scheduled to convene on December 23, according to Telecinco and Libertad Digital. A plausible Yes scenario is a decisive PP–Vox majority enabling a rapid December handover: the October Sigma Dos poll projects 203 combined seats against 176 required, and Rajoy’s 2011 transition took 31 days, although that involved a single-party majority. An explicit announcement of resignation as PM would also trigger Yes without a completed handover, but an election concession alone would not necessarily qualify, and no such resignation commitment is reported. Missing official investiture dates, the absence of a confirmed PP–Vox agreement, conflicting polling and uncertainty over resolution treatment of caretaker terminology limit confidence; the differently defined related markets provide context, not independent anchors.
gpt-6-astra · high effort
66% conf
Yes 30%
No 70%
I retain Polymarket's 29.5% Yes anchor: its 15.5-percentage-point weekly increase plausibly incorporates the snap-election news, and the research establishes no clear unpriced advantage. No qualifying exit is documented: La Moncloa's October 5 statement announces an election rather than resignation, while October 6 legal reporting confirms Sánchez remains PM. Approximately 85 days remain until December 31 ET, but the November 29 election leaves only 32 days afterward, and the December 23 parliamentary constitutive session reported by Telecinco leaves eight days for a completed transition. The status quo is No, with Sánchez continuing in office; a straightforward No scenario is an electoral defeat followed by coalition negotiations and caretaker service extending into January. A Yes scenario is a decisive PP–Vox victory followed by an expedited succession, supported by October 4–5 private polls projecting roughly 191–212 combined seats, comfortably above the 176-seat majority threshold. The 31-day transition in 2011 demonstrates feasibility, but that single-party majority is a better speed benchmark than the prolonged 2019 and 2023 negotiations without guaranteeing equally fast two-party bargaining this time. Separately, an explicit resignation or removal announcement before the deadline would immediately qualify even if effective later, whereas an electoral concession or continued caretaker service alone should not be assumed sufficient. The undated official homepage leaves some status-verification risk, and uncertainty over post-election announcement wording, conflicting polling, and the absence of a verified PP–Vox pact or investiture timetable prevents a stronger departure from the market.
gpt-5.6-sol · high effort
70% conf
Yes 28%
No 72%
(0) The condition has not already been met: La Moncloa and its October 5 election statement still show Sánchez serving as prime minister, with no resignation or removal announcement. (a) About 85 days remain until December 31, including the November 29 election, but the new Congress will not convene until December 23, leaving only eight days for an investiture and swearing-in. (b) If nothing further changes, Sánchez remains prime minister through the campaign and then serves in a caretaker capacity, so the market resolves No. (c) The main No scenario is that the election yields fragmented results or PP and Vox require negotiations, pushing investiture into January as occurred after other recent Spanish elections. (d) The main Yes scenario is that polling showing a PP-Vox absolute majority proves accurate and a pre-agreed bloc executes a rapid investiture like the 2011 transition, or Sánchez explicitly announces his departure before year-end. I anchor on Polymarket's 29.5% Yes price but shade it to 28% because the election call is already reflected in the sharp recent price rise, while the constitutionally fixed December 23 opening and Sánchez's history of remaining in office make the narrow transition window slightly underappreciated.
4. Final plain mean of 5 draws
28% (62% confidence)
Yes: 28% No: 72%
Mean of 5 draws (0.25, 0.26, 0.29, 0.29, 0.28). (0) Not met: La Moncloa and Oct 5-6 reporting show Sánchez dissolved the Cortes but did not resign; he remains PM, then caretaker under Art. 101 until a successor is invested. (a) About 12 weeks remain; the new Cortes convene 23 December by decree, leaving roughly 8 days, including Christmas, for consultations and an investiture vote. (b) Status quo: Sánchez is still PM (caretaker) on 31 December, so NO. (c) NO: PP+Vox win but negotiations and consultations push investiture into January, as in 2019 and as some Spanish press calendars project, or a fragmented result drags formation out. (d) YES: a clear PP+Vox majority (Sigma Dos 203 seats, Ateneo del Dato 191-212) enables a 2011-style quick investiture around 28-30 December, or Sánchez announces he is stepping aside after a heavy defeat, which triggers YES on announcement alone. I put a PP+Vox majority at ~60-65% and a vote passing by year-end, given a majority, at ~25-30%, plus ~7-9% for a resignation announcement or ambiguous resolution. That gives ~0.25, slightly under the 29.5% market anchor.
Pipeline Timing
Total pipeline time: 195.0s
Per-tool research timings shown in the Research section above.