Scan: Will Carlos Ricardo Bruce Montes de Oca win the next Lima mayoral elections?

date	predicted	market price	confidence
2026-09-12	27%	22%	55%

1. Planner Fable 5.1 · Fermi decomposition + tool plan

Tools chosen: polymarket_direct polymarket_related kalshi_related claude_news article_search gdelt_news resolution_source wikipedia

Sub-questions (Fermi decomposition)

Has Carlos Bruce formally registered as a candidate for Mayor of Lima in the 2026 municipal election with the JNE, and with which party/alliance?
What do the most recent Lima mayoral polls (Ipsos, IEP, Datum, CPI) show for Bruce's vote intention relative to other candidates?
Who are the leading rival candidates (e.g., Renzo Reggiardo, others backed by Renovación Popular, Fuerza Popular, Perú Libre, Somos Perú) and what is their polling?
Is the Lima mayoral election still scheduled for October 4, 2026, and is it a single-round plurality vote?
What is the base rate for polling leaders 3-12 months out winning Lima mayoral races given recent volatility (e.g., 2018, 2022)?
Are there any legal, disqualification, or health/scandal issues that could remove Bruce from the ballot?

Planner reasoning

This is a Polymarket question on whether Carlos Bruce (currently mayor of Surco, formerly a congressman) wins the October 2026 Lima mayoral election. Key drivers are current polling (Ipsos, IEP, Datum, CPI), whether Bruce is formally a registered candidate and under which party (he had ties to Renovación Popular / López Aliaga), and how strong rivals like Renzo Reggiardo (current interim mayor), Rafael López Aliaga allies, or others are. The market price is the primary anchor, with polls and candidacy status from JNE as the main updates.

2. Research Parallel tool calls

tool	status	time	items	summary
polymarket_direct	OK	0.5s	1	## This Market's Polymarket Data Will Carlos Ricardo Bruce Montes de Oca win the next Lima mayoral elections? - Current price (probability): 14.70% - 7-day price change: -6.30% - 30-day price change: -18.30% - Total volume: $53,588 (USD notional) - Price range: 6.90% - 39.50% - Data points: 58
polymarket_related	OK	1.3s	24	Polymarket search over 5 keyword(s), kept 24 matches. keyword 'Lima mayor': 8 markets \| keyword 'Lima mayoral': 8 markets \| keyword 'Carlos Bruce': 8 markets \| keyword 'Reggiardo': 0 markets \| keyword 'Peru election': 0 markets
kalshi_related	OK	1.9s	2	2 related markets / summaries. keyword 'Lima mayor': ok \| keyword 'Peru election': ok
claude_news	OK	24.6s	7	Here are the key findings on the Lima mayoral race (October 4, 2026 election): - Bruce is a confirmed, registered candidate: Carlos Bruce, outgoing mayor of Surco, resigned that post to run and was the first candidate officially registered for the 2026 Lima mayoral race, running for **Somos Per
article_search	OK	1.4s	23	Fetched 23 unique articles across 4 queries (lookback=60d). 'Carlos Bruce alcaldía de Lima 2026 encuesta': 10 articles \| 'elecciones municipales Lima 2026 candidatos alcalde': 10 articles \| 'Renzo Reggiardo candidato alcalde Lima 2026': 10 articles \| 'Lima mayoral election 2026 poll': 10 articles
gdelt_news	OK	58.3s	30	GDELT: 30 articles across 3 queries (lookback=45d). 'Carlos Bruce Lima alcalde': 10 hits \| 'elecciones municipales Lima 2026': 10 hits \| 'encuesta alcaldía Lima 2026': 10 hits
resolution_source	FAILED	1.6s	1	https://jne.gob.pe: HTTP 404; https://www.onpe.gob.pe/: HTTP 403
wikipedia	OK	1.1s	4	Fetched 4 Wikipedia entries (1 missing pages).

3. Evidence Brief Sonnet 5 · 7114 chars

# Current state Bruce is a registered, active candidate for Mayor of Lima under Somos Perú (resigned as Mayor of Surco to run, June 2026). As of the most recent full-metro polls (early-to-mid September 2026), he polls a clear second place, trailing Rafael López Aliaga (Renovación Popular) by 3–21 points depending on poll; he led narrower/earlier polls (May–July 2026) in a fragmented field. No disqualification proceedings are reported. Election remains scheduled for October 4, 2026. # Timeline of key events - 2025-10 (confirmed, Wikipedia): Renzo Reggiardo (Renovación Popular) becomes Mayor of Lima, succeeding Rafael López Aliaga (interim/succession, not an election result). - 2026-05-23 (reported, Infobae/Ipsos): Bruce leads open field with 13%, Urresti 12%, Sifuentes 10%, Paredes 9%. - 2026-06-18 (reported, Infobae): Bruce resigns as Mayor of Surco, formally registers for Somos Perú — first candidate officially registered for the race. - 2026-06 (reported): López Aliaga announces he will not run for Lima mayor himself, instead joining Luis Rubio's ticket as deputy mayor; Bruce calls this a "fraude de ley," alleging Rubio would later resign to let López Aliaga assume the post. - 2026-07-09 (reported, Datum/Caretas): Bruce leads with 12.3%, Allison 11.3%, Urresti 10.3%. - 2026-09-04/10 (reported, IEP/RPP, national sample): López Aliaga leads with 20.1%, Bruce second at 17.1%. - Early Sept 2026 (reported, Citopinion, Lima-only): López Aliaga 33.4%, Bruce 12.0%, Allison 11.8%, Urresti 9.6%. - Mid-Sept 2026 (reported, CPI, only 10 districts, non-representative): Bruce 40%, López Aliaga 39.1%. - 2026-09-06 (reported, Diario Correo): Bruce interview confirms he remains an active, registered candidate; no disqualification found. # Event Will Carlos Ricardo Bruce Montes de Oca win the October 4, 2026 Lima mayoral election? # Outcomes to forecast Yes / No # Kalshi market anchor No kalshi_direct data was returned (kalshi_related search found no matching Lima mayor market). The only direct pricing on this exact ticker comes from Polymarket: current YES price 14.7%, down 6.3pts (7-day) and 18.3pts (30-day), range 6.9%–39.5% over 58 days, volume $53,588. Treat this as the best available cross-platform consensus proxy for the Kalshi price. # Resolution source Both official sources failed to load (jne.gob.pe: 404; onpe.gob.pe: 403). No direct government confirmation available; resolution will rely on the market's stated fallback — consensus of credible reporting. # Sub-question answers 1. **Registered candidacy** — Yes; Bruce resigned as Mayor of Surco and formally registered as the first candidate for the 2026 Lima mayoral race, running for Somos Perú (infobae.com, 2026-06-18). 2. **Recent polls** — Bruce led fragmented early polls (Ipsos 13% in May; Datum 12.3% in July) but has since fallen to second place: IEP (Sept, national) has López Aliaga 20.1% vs Bruce 17.1%; Citopinion (Sept, Lima-only) has López Aliaga 33.4% vs Bruce 12.0%. A non-representative CPI poll (10 districts only) shows Bruce narrowly ahead 40% to 39.1%. 3. **Rival candidates** — Renzo Reggiardo is the current (interim, succession-based) Mayor via Renovación Popular; Rafael López Aliaga said he'd run as deputy on Luis Rubio's ticket but polls increasingly show him topping the mayoral field himself (unclear/conflicting reporting on his actual ballot position); other contenders include Daniel Urresti (~9-12%), Francis Allison (~11-12%), Susel Paredes, Hernán Sifuentes, Ricardo Belmont — a highly fragmented field. 4. **Election timing/format** — Still scheduled for October 4, 2026 per event description; no evidence of postponement. Peruvian mayoral races are traditionally single-round plurality (no runoff), consistent with all research. 5. **Base rate for 3-12mo-out poll leaders winning** — No specific base-rate data was returned by research tools; general knowledge (not sourced here) suggests Lima mayoral races have shown historical volatility (e.g., late surges in 2018, 2022), implying leads at this stage are not highly durable, but this claim is unsourced in the raw research. 6. **Legal/disqualification risk** — None found; Bruce remains an active, registered candidate as of Sept 6, 2026 (diariocorreo.pe). # Key facts (high-confidence, factual) 1. [Wikipedia] Bruce born 1957, former Congressman for Lima (2006–2019). 2. [Wikipedia] Reggiardo has served as Mayor of Lima since October 2025 (succession, not election). 3. [Infobae] Bruce resigned as Surco mayor and registered for Somos Perú, June 2026. 4. [es.Wikipedia] Race narrowed from 42 groups filing to 21 lists for Lima mayoralty. 5. [Polymarket] YES price on this exact event fell from ~39.5% high to 14.7%, a sharp 30-day decline (-18.3pts). # Cross-market signals - Kalshi related: No matching market found; unrelated climate/other tickers returned. - Polymarket (same event): 14.7% YES, trending down sharply (-6.3% 7d, -18.3% 30d) — consistent with Bruce's slide to second place in Sept polls. - Polymarket sister markets show near-zero pricing for most other named candidates except López Aliaga-adjacent figures (Rubio 9.6k volume), Urresti (1.6%), Allison (1.25%), Paredes (1.55%), Belmont (2.05%) — market appears to be pricing a fragmented but López Aliaga-leaning race, though no explicit López Aliaga/Rubio ticket price was captured. - Sportsbook implied: none available. # Analyst opinions and speculation - Claude_news synthesis: "Bruce has never led the most recent (September) full-metro polls, though remains competitive and a top-two contender" — treated as reported analysis, not fact. - Bruce himself alleges a "fraude de ley" scheme by López Aliaga/Rubio, an unverified political accusation (rumored). # Directional lean per outcome - **Yes (Bruce wins)**: Supporting — consistent top-2/3 polling since May, name recognition, official registration, no scandal/disqualification. Opposing — has lost polling lead since July, trails López Aliaga by double digits in two of three most recent full-metro polls (IEP, Citopinion); Polymarket price falling sharply. - **No (Bruce loses)**: Supporting — recent trend clearly negative for Bruce, López Aliaga-aligned camp gaining, large undecided/fragmented vote adds uncertainty; Polymarket at just 14.7% and declining. Opposing — race is volatile and fragmented (multiple candidates in low double digits), any late shift could restore Bruce's position; one (unrepresentative) CPI poll still shows him ahead. # Gaps / unknowns - Whether López Aliaga is actually on the ballot as mayoral candidate or only deputy mayor is unresolved/contradictory across sources — critical to interpreting Sept polls. - No official JNE/ONPE data accessible (both fetch failures). - No base-rate data on polling-leader conversion for Lima races. - No most-recent (late Sept/Oct) poll data available. # Calibration anchors - Kalshi/Polymarket current YES price: 14.7% (declining sharply, 30-day range 6.9%-39.5%). - Precedent: Lima mayoral races have shown historical late volatility (unsourced general knowledge); no verified base-rate figure available from research.

4. Forecasters 5 draws · Fable 5.1 + GPT-5.6 Sol

claude-fable-5-1

50% conf

Yes	16%
No	84%

Bruce is a registered, undisqualified candidate and a consistent top-two contender, but he lost his early-summer polling lead and now trails the López Aliaga/Rubio camp in both representative September polls (IEP: 20.1 vs 17.1; Citopinion: 33.4 vs 12.0), with only a non-representative 10-district CPI poll showing him narrowly ahead. No Kalshi market exists, so the Polymarket YES price of 14.7% (down 18 pts over 30 days) serves as the consensus anchor, and it is consistent with the polling slide. Lima's single-round plurality format in a fragmented 21-list field, historical late volatility, and unresolved ambiguity about whether López Aliaga is actually the mayoral candidate on the ballot keep a modest upside for Bruce, so I sit slightly above the market at 0.16.

claude-fable-5-1

46% conf

Yes	16%
No	84%

Bruce is a registered, undisqualified candidate and consistently a top-two contender, but he lost his early fragmented-field lead: the two most credible September full-metro polls (IEP 20.1–17.1, Citopinion 33.4–12.0) place him second behind López Aliaga/the Renovación Popular ticket, and the only poll showing him ahead (CPI, 10 districts) is non-representative. Polymarket, the best available proxy for the Kalshi anchor, prices YES at 14.7% and has fallen 18 points over 30 days, consistent with his polling slide. Lima's single-round plurality format and historically volatile late swings keep a Bruce win plausible, so I stay near the market with a slight upward nudge for fragmentation and ballot ambiguity around López Aliaga's actual position, landing at ~16% Yes.

claude-fable-5-1

47% conf

Yes	16%
No	84%

Bruce is a registered, unchallenged candidate and a consistent top-two contender, but the most recent full-metro September polls (IEP: López Aliaga 20.1 vs Bruce 17.1; Citopinion: 33.4 vs 12.0) show him trailing, and the only poll showing him ahead (CPI) is a non-representative 10-district sample. Polymarket, the only direct pricing on this event, sits at 14.7% YES and has fallen 18 points in 30 days, consistent with his slide from the May–July lead. In a single-round plurality race with a fragmented field and a history of late Lima surges, a clear second-place candidate retains a meaningful but minority chance, so I stay near the market anchor with a slight upward nudge for volatility and the unresolved question of whether López Aliaga is actually on the ballot as mayoral candidate.

gpt-5.6-sol

61% conf

Yes	16%
No	84%

Bruce is registered, active, and free of reported disqualification risk, so his candidacy itself is secure. However, the representative September polls place him second, with gaps ranging from 3 points in IEP to 21.4 points in the Lima-only Citopinion poll; the poll showing him narrowly ahead covers only 10 districts and is non-representative. I anchor near the 14.7% Polymarket YES price and raise it slightly because Bruce remains a credible top-two candidate in a volatile plurality race, while uncertainty over López Aliaga's actual ballot position could make headline polling misleading. The market's sharp recent decline and Bruce's loss of his earlier polling lead still make No the clear favorite.

gpt-5.6-sol

57% conf

Yes	16%
No	84%

Bruce is registered, faces no reported disqualification risk, and remains a leading contender, which keeps Yes meaningfully above zero. However, the representative September polls place him second, with gaps ranging from 3 to 21 points, while the poll showing him narrowly ahead covers only 10 districts and is non-representative. The fragmented single-round plurality format permits a late upset, but the lack of clarity over López Aliaga's actual ballot position makes the polling unusually difficult to interpret. I anchor near the 14.7% Polymarket YES price and move slightly upward to 16% because Bruce remains competitive and Lima races can be volatile.

6. Final plain mean of 5 draws

16% (52% confidence)

Yes: 16% No: 84%

Mean of 5 draws (0.16, 0.16, 0.16, 0.16, 0.16). Bruce is a registered, undisqualified candidate and a consistent top-two contender, but he lost his early-summer polling lead and now trails the López Aliaga/Rubio camp in both representative September polls (IEP: 20.1 vs 17.1; Citopinion: 33.4 vs 12.0), with only a non-representative 10-district CPI poll showing him narrowly ahead. No Kalshi market exists, so the Polymarket YES price of 14.7% (down 18 pts over 30 days) serves as the consensus anchor, and it is consistent with the polling slide. Lima's single-round plurality format in a fragmented 21-list field, historical late volatility, and unresolved ambiguity about whether López Aliaga is actually the mayoral candidate on the ballot keep a modest upside for Bruce, so I sit slightly above the market at 0.16.

Pipeline Timing

Total pipeline time: 138.2s

Per-tool research timings shown in the Research section above.