Tools chosen: kalshi_direct kalshi_related polymarket_related claude_news gdelt_news wikipedia code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is a long-horizon Kalshi market on Leni Robredo winning the 2028 Philippine presidential election. Key drivers are whether she intends to run, her current polling versus rivals like Sara Duterte, and the shape of the likely field given the Marcos-Duterte feud. I'll anchor on the Kalshi price, triangulate with Polymarket and related Kalshi candidate markets, and use news/wiki for the political landscape.

# Current state Robredo has explicitly and repeatedly ruled out running for president in 2028 (most recently April 2026), instead seeking re-election as Naga City mayor; no Kalshi price exists yet for this specific leg (KXPHILIPPINESPRES-28-LROB), and the resolution requires her to actually win the May 2028 presidential election, which requires her to be a candidate at all. # Timeline of key events - 2022-05-09: Robredo loses 2022 presidential election to Bongbong Marcos/Sara Duterte ticket in a landslide (confirmed, Wikipedia). - 2025: Robredo runs for and wins Naga City mayoral race (confirmed, Wikipedia/claude_news). - 2026-02-18: Sara Duterte formally declares 2028 presidential candidacy (reported, claude_news). - 2026-04-21: Robredo publicly rules out a 2028 national run, says she'll seek Naga re-election instead (confirmed, Inquirer/Philstar). - 2026-05-11: Second impeachment of Sara Duterte passed by the House, 257 votes (confirmed, Wikipedia). - 2026-05-30: Pulse Asia/Stratbase two-way hypothetical poll: Duterte 51% vs Robredo 41% (reported). - 2026-06-28–07-06: Pulse Asia multi-candidate survey: Duterte 49%, Robredo 26% (reported, Manila Times). - 2026-07-06: Senate impeachment trial of Duterte opens (confirmed, DW/Courthouse News). - 2026-07-23: Three-way survey: Duterte 51%, Robredo 27%, Tulfo 16% (reported, Manila Times). - 2026-07-31: Marcos approves release of Duterte's tax records to impeachment trial (reported). - 2026-08-14: Marcos says he hasn't decided who to back as his successor (reported). - 2026-08-17: Reports of Marcos-Duterte "negotiation rumors" amid ongoing trial (rumored, Manila Bulletin). # Event Will Leni Robredo win the next (2028) Philippine presidential election? # Outcomes to forecast Yes / No # Kalshi market anchor No live Kalshi price available for KXPHILIPPINESPRES-28-LROB — market appears unlisted, too new, or without quotes (kalshi_direct returned no data). No related-series pricing found either (kalshi_related found 0 markets in KXPHILIPPINESPRES series). This brief must rely on polling/fundamentals in absence of a market anchor. # Sub-question answers 1. **Robredo's 2028 intent/role** — She has explicitly ruled out a 2028 national run multiple times (April 2026), citing preference to serve a second term as Naga City mayor (current role since 2025). [Inquirer, Philstar] 2. **Recent polling** — Sara Duterte leads all tested scenarios: two-way (51% Duterte–41% Robredo, May 2026 Pulse Asia/Stratbase) and multi-candidate (49% Duterte–26% Robredo, and 51%-27%-16% three-way vs. Tulfo, June–July 2026 Pulse Asia). [Manila Times, Philstar] 3. **Sara Duterte status** — Formally declared candidacy Feb 2026; frontrunner in every poll; facing a live Senate impeachment trial (opened July 6, 2026, ~92 hearing days) on charges including unexplained wealth and threats against Marcos; conviction needs 16/24 senators and would permanently disqualify her from office. [Courthouse News, Wikipedia] 4. **2022/2025 performance & ceiling** — Robredo lost 2022 in a landslide (Marcos 31.6M votes vs. her total far lower, exact figure not in extracts) but won the 2025 Naga mayoral race, indicating strong local but unproven current national viability. [Wikipedia] 5. **Prediction market probabilities** — No Polymarket or Kalshi data found for Robredo or Philippine 2028 race generally (polymarket_related: 0 matches; kalshi_related: 0 matches in series). No cross-market comparison possible. 6. **Structural factors** — No consolidated opposition coalition has formed; Kiko Pangilinan warns of a "leadership vacuum" without Robredo; Risa Hontiveros open to running if opposition consensus emerges; Marcos undecided on backing a successor; Duterte-Marcos "negotiation rumors" reported amid trial (unconfirmed). [Philstar, Manila Bulletin] # Key facts (high-confidence, factual) 1. [Inquirer/Philstar] Robredo has stated unambiguously (April 2026) she will not run nationally in 2028. 2. [Manila Times] Duterte leads Robredo in every recent poll by 20-25+ points. 3. [Wikipedia] Robredo lost the 2022 presidential race in a landslide to Marcos/Duterte. 4. [Courthouse News/DW] Duterte's impeachment trial is live and could result in disqualification if convicted by 16/24 senators. 5. [Kalshi tools] No market pricing exists for this specific contract or the broader series. # Cross-market signals - Kalshi related: No KXPHILIPPINESPRES series markets found; only unrelated "President before 2045" US markets returned (irrelevant). - Polymarket: No 2028 Philippine election markets found at all. - Sportsbook implied: None available. # Analyst opinions and speculation - Rolling Stone Philippines and opposition figures (Pangilinan) argue Robredo's absence creates a leadership vacuum with no clear replacement, implying some analysts hope she reconsiders — but this is speculative pressure, not a signal of intent change. - Manila Times opinion piece (Aug 2026) suggests "calcified presidential polling hits a wall," implying current numbers may not be fully predictive this far out. - Code-execution base-rate analysis: in the last three PH elections (2010, 2016, 2022), the eventual winner was NOT among top-2/3 in polls this far out — suggesting weak predictive power of early polling in general, though analysts note Robredo (a known past runner-up) isn't a clean analog to those "dark horse" cases. # Directional lean per outcome - **Yes (Robredo wins)**: Opposing evidence dominates — she has explicitly and repeatedly ruled out running; no declared candidacy exists; trails badly in polls even in hypothetical matchups. Supporting evidence is thin: past national profile, opposition's lack of alternative, historical pattern that early frontrunners/decisions can reverse, and outside chance she re-enters if opposition consensus solidifies or field changes dramatically (e.g., Duterte disqualified and vacuum emerges). Overall very low probability. - **No (Robredo does not win)**: Strongly supported — non-candidacy statements, poor polling versus Duterte even hypothetically, focus on local re-election, landslide 2022 loss establishing a lower national ceiling. # Gaps / unknowns - No Kalshi or Polymarket pricing exists for this contract or comparable Philippine 2028 legs — cannot benchmark against market consensus. - Unclear whether Robredo could reverse her decision before candidacy filing deadlines (likely late 2027). - Outcome of Duterte impeachment trial (conviction/disqualification) unresolved — could reshape entire field but doesn't directly help Robredo absent her re-entry. - No confirmed alternative opposition standard-bearer identified yet (Hontiveros only "open" hypothetically). # Calibration anchors - No Kalshi YES price available (anchor missing) — treat as an off-market, low-probability tail bet given explicit non-candidacy statements. - Historical precedent: candidates who publicly and repeatedly rule out running in the Philippines rarely reverse course close to filing deadlines; combined with a 20-25 point polling deficit in hypothetical matchups, implied probability should be very low (single digits or lower), likely in the 1-5% range absent market data.

1. Both forecasts converge tightly (2.5-3%) without acknowledging the compounding nature of the required conditional chain — she must (a) reverse an explicit, repeated public commitment, (b) file before the ~late-2027 deadline, (c) secure an opposition coalition/nomination, and (d) overcome a 20-25 point polling deficit even in a hypothetical matchup where she isn't even trying to win; multiplying realistic probabilities for each step (e.g., 15% reversal × 40% nomination × 20% win) arguably yields a figure below 1%, suggesting both forecasts may be too high rather than well-calibrated. 2. Neither forecast meaningfully engages with the brief's own base-rate caveat that "in the last three PH elections (2010, 2016, 2022), the eventual winner was NOT among top-2/3 in polls this far out" — this is presented as a reason for uncertainty but the brief itself notes Robredo isn't a clean analog (she's a known quantity, not a dark horse), and both forecasters should have explicitly dismissed this point rather than ignoring it, since citing it without rebuttal could wrongly inflate estimates for other readers. 3. Both forecasters treat Duterte's possible disqualification as a pathway that helps Robredo, but neither addresses the more likely scenario that disqualification would elevate a different Marcos-aligned or opposition figure (e.g., Hontiveros, or even Marcos-backed successor) rather than create a vacuum specifically for Robredo, who has shown zero indication of wanting to fill it. 4. Neither forecast discusses the asymmetry in confidence scores (0.68 vs 0.79) despite nearly identical probability outputs — this divergence in stated confidence isn't explained by any difference in reasoning depth or evidence used, which is an internal inconsistency worth flagging even though it doesn't affect the point estimate. 5. Both forecasts fail to consider the resolution mechanics risk: the market question requires her to "win" the presidential election by May 2028, and neither addresses timeline/counting risk (e.g., election disputes, delayed results, or a scenario where she's drafted very late as a compromise candidate post-disqualification with insufficient time to campaign) — these tail mechanics are absent from both rationales. 6. Given the complete absence of a Kalshi or Polymarket anchor (explicitly confirmed in the brief), both forecasters appropriately avoided anchoring bias, but neither flagged that this specific sub-market (LROB leg) being unlisted at all could itself signal market-maker skepticism that this leg is even worth pricing — an implicit signal of near-zero probability that could have been used to justify pushing the estimate even lower (e.g., under 2%).

2% (74% confidence)

Yes: 2% No: 98%

Both forecasts agree at 2.5-3%, but the red-team critique persuasively argues this is too high: Robredo winning requires a compound chain — reversing an explicit, repeated non-candidacy commitment (most recently April 2026), filing by late 2027, securing an opposition coalition that hasn't formed, and overcoming a 20-25 point deficit to Duterte even in hypothetical head-to-heads. Multiplying plausible step probabilities yields well under 2%. The base-rate caveat about early polls being unpredictive doesn't apply cleanly since Robredo is a known past landslide loser, not a dark horse, and a Duterte disqualification would more likely elevate other figures than draft Robredo. I pull below both forecasts to 1.5%, retaining a small tail for the long horizon and impeachment-driven field disruption.

Total pipeline time: 171.0s