Tools chosen: polymarket_direct polymarket_related kalshi_related claude_news gdelt_news claude_news code_execution wikipedia

Sub-questions (Fermi decomposition)

Planner reasoning

This is a Polymarket geopolitical question with a long horizon (through end of 2026) and a fairly broad resolution criterion (any signed framework/roadmap counts, only Ukraine's signature needed). The key drivers are the state of the US-brokered peace plan negotiations as of now, historical base rates for war-ending agreements, and cross-venue pricing. I'll anchor on the Polymarket price, pull related Kalshi/Polymarket markets (e.g., ceasefire-by-date markets), and run news searches on the current negotiation state.

# Current state No signed peace deal or joint framework exists as of mid-August 2026; talks continue (Ukraine submitted new proposals to the US on Aug 12, 2026) but Russia (Lavrov, Medvedev) is publicly rejecting a ceasefire ahead of Sept 18-20 Duma elections, and core disputes (Donbas, NATO status, security guarantees) remain unresolved. Polymarket prices this exact contract at 13.5%, down sharply from a 30-day high of 38%. # Timeline of key events - 2025-11 to 2025-12: Witkoff/Kushner/Driscoll/Rubio mediate talks with Umerov (Ukraine) and Dmitriev (Russia); initial 28-point (pro-Russia-leaning) plan reworked into 20-point framework (confirmed — Kyiv Independent, Axios). - 2025-12: Zelensky reveals 20-point plan draft "backed by Ukraine, US"; Donbas/Zaporizhzhia NPP control and NATO aspirations unresolved (confirmed — Kyiv Independent). - 2026-01-06: 35-country "Coalition of the Willing" Paris Declaration on ceasefire monitoring/security guarantees (confirmed). - 2026-02: Geneva trilateral talks put territory on agenda; talks break on territory/security guarantees; Zelensky says US wants a deal "by June" (reported — CNN). - 2026-04: 32-hour Orthodox Easter truce proposed by Zelensky, accepted by Putin (confirmed, limited/temporary). - 2026-05-09/11: US-brokered 3-day ceasefire + 1,000-prisoner exchange (confirmed — NPR/CBC); same week Kremlin states peace is "a very long way off." - 2026-05: Rubio acknowledges mediation "stagnated"; June deadline effectively missed (reported). - 2026-06-05: St. Petersburg forum — Putin says Russia will sign "when the time is right," questions Zelensky's legitimacy given expired term (reported). - 2026-06: Moscow calls Western-backed dialogue conditions "completely unacceptable" (reported). - 2026-07-27/28: Zelensky visits UK, then White House talks with Trump on peace process/Patriot co-production (confirmed). - 2026-08-12: Zelensky says Ukraine handed US new proposals; US negotiators to visit both countries (reported — Al Jazeera). - 2026-08-14: Lavrov rules out frontline-freeze ceasefire; Medvedev says war ends only on Russia's terms — timed near Sept 18-20 Duma elections (reported — Critical Threats). - 2026-08-11/15: Active combat continues (Russian strikes, Ukrainian deep strikes) — no ceasefire in force (confirmed). # Event Will Ukraine sign, before Jan 1 2027, a written instrument with Russia as a co-party that ends hostilities or commits both sides to a defined peace process (per detailed resolution criteria)? # Outcomes to forecast Yes / No # Kalshi market anchor No Kalshi-direct price returned for this exact ticker; kalshi_related search returned only a tangential "Ukraine presidential election before 2027" market (8%, down 22% in 30 days, thin volume ~1,258 contracts/day) — not a direct read on this question. **Primary anchor is therefore Polymarket**, same-titled market: 13.5% YES, down 1% (7d) and down 13% (30d), range 12.5%-38% over 120 days, $2.58M volume — a sharp de-risking from earlier optimism. # Sub-question answers 1. **Polymarket price/trajectory**: 13.5% currently; fell from 38% high; down 13pts in 30 days, indicating fading optimism (polymarket_direct). A separate claude_news snapshot cited ~20% and a related "ceasefire by end 2026" market at 25.5%, showing some data staleness/version differences but consistent low/declining pricing. 2. **US-brokered plan status**: 20-point framework drafted (Dec 2025), publicly discussed, but not signed/initialed by both parties; Ukraine sent new proposals Aug 12, 2026; no joint text executed (claude_news, Kyiv Independent, Al Jazeera). 3. **Kalshi vs Polymarket**: No direct Kalshi price found; only tangential Kalshi election market available. Polymarket's own related ceasefire market (~25.5% No-heavy at 74.5%) suggests cross-market consistency toward low probability, but Kalshi comparison is unconfirmed due to data gap. 4. **Red lines**: Putin demands full Donbas (incl. unoccupied areas), neutrality, demilitarization, rejects Western troop deployments; Zelensky resists territorial concession fearing it enables future invasion and wants NATO/security guarantees (not resolved in current draft) — sides remain far apart (thesoufancenter.org, claude_news). 5. **Historical base rate**: ~10-20% annual probability of formal signed agreement once negotiations are underway; converts to ~10.8%-21.5% fair-value 13-month probability (code_execution/literature estimate). 6. **Partial Ukraine-only-signed framework**: Plausible under resolution wording (only Ukraine's signature required, framework/roadmap qualifies) — this lowers the bar vs. a full mutual treaty; however even this narrower bar hasn't been met as talks remain unsigned as of Aug 2026. 7. **Scheduled deadlines**: "June 2026" US-pushed deadline missed; Sept 18-20, 2026 Duma elections cited as reason for Russian hardening near-term; no other binding deadline/summit is confirmed before year-end 2026 (claude_news, criticalthreats.org). # Key facts (high-confidence, factual) 1. [polymarket_direct] Contract trading at 13.5% YES, down from 38% peak. 2. [claude_news/Kyiv Independent] 20-point plan drafted Dec 2025; NATO membership and Donbas/Zaporizhzhia NPP control unresolved. 3. [criticalthreats.org] Aug 14, 2026: Lavrov rejects frontline-freeze ceasefire; Medvedev says war ends only on Russian terms. 4. [NPR/CBC] Only limited, temporary truces achieved (3-day May ceasefire, Easter truce) — no comprehensive deal. 5. [criticalthreats.org] Russian summer 2026 offensive gained only ~37.85 sq km in July — battlefield stalemate, not decisive pressure toward settlement. # Cross-market signals - Kalshi related: No direct match found; tangential election market shows declining odds of near-term political disruption (8%, down 22% 30d). - Polymarket: Same-question market at 13.5%; related "ceasefire by end 2026" market ~25.5% (per claude_news, possibly a different snapshot/market) — both signal low probability, ceasefire priced higher than full peace deal as expected given lower bar. - Sportsbook implied: None found. # Analyst opinions and speculation - ORF Online: 2026 "could" see cessation of hostilities but likely only a "limited and fragile ceasefire," not comprehensive peace — a lower bar than this market requires. - Pantheon Insights: "diplomatic process that keeps producing meetings without producing peace." - Code_execution model: fair-value range 11-22% based on historical interstate settlement hazard rates; current Polymarket price (13.5%) sits within/near this band, suggesting reasonably calibrated pricing absent strong catalysts. # Directional lean per outcome - **Yes**: Active, sustained US mediation; frameworks already drafted; low bar (Ukraine-only signature, ceasefire-or-process language) increases qualifying paths; Trump admin pressure could force a signing event. - **No** (favored): Russia hardening rhetoric near Duma elections; maximalist Putin demands unchanged; battlefield stalemate reduces urgency; June deadline already missed; Polymarket pricing declining sharply (38%→13.5%); historical base rates for interstate peace deals within ~12-16 months are low. # Gaps / unknowns - No confirmed Kalshi-direct YES price for this specific ticker was returned — anchor relies on Polymarket as proxy. - Discrepancy between two claude_news snapshots (13.5% vs ~20%) suggests time-lag/version differences; latest polymarket_direct data (13.5%) should be treated as most current. - No clarity on whether any near-term summit (e.g., post-Duma-election shift) could restart momentum before Dec 2026. # Calibration anchors - Polymarket YES price (anchor): 13.5%, down from 38% high, 120-day trend negative. - Historical base rate model: ~11-22% fair value for signed agreement within ~13 months of active negotiation. - Precedent: Minsk I/II process took years without durable resolution; similarly protracted interstate conflicts rarely produce full signed treaties within a single year even amid active mediation.

1. Both forecasters anchor tightly on the Polymarket 13.5% figure but neither seriously addresses the "Kalshi vs. Polymarket" gap flagged in the brief — the actual Kalshi ticker for this question wasn't found, and blindly importing Polymarket's price assumes cross-platform equivalence in liquidity/resolution wording that hasn't been verified, which both forecasts treat as settled rather than a genuine unknown. 2. Neither forecast meaningfully engages with sub-question 6 (the "Ukraine-only-signed framework" lower bar) as a distinct probability driver — both mention it in passing as a minor upward adjustment, but given the brief explicitly says this "lowers the bar vs. a full mutual treaty," the resolution criteria's exact wording could matter enormously (e.g., a ceasefire-adjacent framework signed just by Kyiv with US backing could resolve YES even without Russian signature), and this ambiguity deserves more weight/wider uncertainty bands rather than a small nudge. 3. Both forecasts under-weight the Sept 18-20 Duma election as a potential inflection point rather than just a hardening driver — the brief notes Russian rhetoric is "timed near" the election, implying post-election softening is a plausible scenario neither forecast models explicitly, leaving an unexamined path to a Q4 breakthrough that could raise YES above the current trajectory. 4. Both anchor within a narrow 10-14% band that clusters near the low end of the stated historical base-rate range (11-22%), effectively adopting the pessimistic edge of their own reference class without justifying why the true value should sit at the bottom rather than the middle (~16-17%) of that band. 5. Neither forecast addresses potential resolution ambiguity/technical-YES risk from already-completed partial agreements (Easter truce, May 3-day ceasefire, prisoner exchanges) — if the resolution criteria's "commits both sides to a defined peace process" language is interpreted loosely, some of these could arguably already qualify or set precedent for an easy near-term qualifying event, a scenario the brief raises but both forecasts dismiss as "limited/temporary" without probability-weighting the interpretive risk. 6. Both forecasts converge very closely (10% vs 14%) despite claiming independent reasoning, suggesting anchoring convergence on the same Polymarket number rather than genuinely diverse modeling — neither explores a tail scenario where Trump-administration pressure forces a rushed, face-saving signing event before year-end (a stated "Yes" driver in the brief) with any real probability mass, keeping both estimates likely too tightly bunched near the pessimistic consensus.

12% (69% confidence)

Yes: 12% No: 88%

Polymarket's same-titled contract at 13.5% (down from a 38% peak) is the best available anchor, and with only ~4.5 months remaining and no joint text signed, time decay argues for slightly below the anchor. Substantively, Russia has hardened (Lavrov ruling out a frontline freeze, Medvedev's 'Russia's terms' framing), core disputes over Donbas, NATO status and security guarantees remain unresolved, the June 2026 US deadline slipped, and a battlefield stalemate removes urgency to settle. The critique is right that both forecasters clustered at the pessimistic edge and under-weighted (a) the looser resolution bar allowing a Ukraine-signed peace-process framework, (b) possible post-Duma-election softening, and (c) a rushed, face-saving Trump-brokered signing event — these paths justify not pushing below ~10%. Netting time decay against these upside/interpretive paths leaves YES essentially at the market anchor, marginally discounted: 12%.

Total pipeline time: 250.9s