Will Mesías Guevara win the 2026 Peruvian presidential election?

Step-by-step probability analysis:

1. Baseline polling position (11 days pre-election): Mesías Guevara consistently polls below 1% in both Ipsos (March 21-22) and Datum (March 6-10) polls. This places him far outside contention, trailing frontrunners López Aliaga (10-11.4%) and Fujimori (10.9-11%) by orders of magnitude, and even behind second-tier candidates López Chau (6.5-7.9%) and Sánchez (7.5%).

2. Time constraint analysis: With only 11 days until the April 12, 2026 first round, there is insufficient time for a candidate polling at <1% to surge to a top-2 finish required to advance to the June runoff. Historical precedent in Peruvian elections shows no candidate polling below 1% within two weeks of election has ever won.

3. Structural barriers: Peru's electoral system requires either >50% in first round (virtually impossible in 35-candidate field) or top-2 finish to advance to runoff. Guevara would need to leapfrog at least 4-5 candidates polling 7.5-11% each - an unprecedented movement requiring roughly 10-fold increase in support within 11 days.

4. Undecided voter analysis: While 36% undecided/blank voters exists, there is no evidence Guevara is positioned to disproportionately capture these voters. His sub-1% polling suggests weak name recognition, campaign infrastructure, or policy appeal compared to established candidates.

5. Market consensus validation: Multiple independent prediction markets (MLQ.ai <1%, Polymarket fractions of cent, traditional bookmakers 100/1) and current market odds (0.55%) all converge on extremely low probability, suggesting efficient price discovery.

6. Pathway probability: For Guevara to win, he would need: (a) massive polling error understating his support by >10x, (b) dramatic campaign event/scandal eliminating all top candidates, or (c) capture of ~10%+ support from undecideds while all other candidates remain static. Each pathway has <1% individual probability.

7. Calibrated estimate: Given convergent evidence from polls, markets, bookmakers, and structural/temporal constraints, I estimate 0.2% probability - slightly below current market odds of 0.55%. The market may be pricing in small tail risk premium for unexpected shocks, but even accounting for uncertainty, probability should be under 0.5%.

Comparison to market: Current odds of 0.55% appear slightly overpriced relative to evidence. My estimate of 0.2% reflects the near-impossibility of sub-1% candidate winning within 11 days, while acknowledging non-zero probability for black swan events (major scandal, unprecedented polling error, terrorist attack disrupting election).

Modest edge detected: LEAN NO / SELL at 0.55%

Current market odds of 0.55% appear slightly overpriced relative to my estimated probability of 0.2%. This represents approximately 2.75x overvaluation, though in absolute terms the edge is small (0.35 percentage points).

Rationale for edge:

• All available evidence (polls, historical precedent, time constraints) points to probability well below 0.5%
• Market may be pricing in excess tail risk premium for black swan events
• With 11 days to election and consistent sub-1% polling, even generous uncertainty bounds suggest <0.3-0.4% probability
• Efficient market hypothesis less reliable for extreme long-shot candidates where liquidity is thin

Trade recommendation: Modest edge favors NO/SELL position, but position sizing should be limited given:

1. Absolute probability difference is small (0.35 points)
2. Thin liquidity in long-shot markets may prevent efficient entry/exit
3. Non-zero tail risk of unprecedented polling error or black swan event
4. Resolution date uncertainty if results are disputed

Expected value: Selling NO at 0.55% when true probability is ~0.2% offers positive expected value, but transaction costs and liquidity constraints may erode edge. This is a "technically correct but practically marginal" edge.