Will Geraldo Alckmin win the 2026 Brazilian presidential election?
As of Sep 30, 2026, 9:01 PM ET, Polymarket priced this market at 0.1% (little changed over 24 hours). It had $108.5K traded in the past 24 hours, $338.5K of order-book liquidity and a bid-ask spread of 0.1 pts. probcast.co rates the support behind this price as strong.
No meaningful repricing — the probability is steady.
The pricing is supported by healthy trading volume and market depth, a tight spread.
How credible was the move?
Three separate questions — a move can be genuine while the latest price is still settling. Methodology →
Move validity
Is the move backed by real trading and depth?
StrongThe pricing is supported by healthy trading volume and market depth, a tight spread.
Consensus stability
Has the market settled at the new probability?
StableThe probability has held near its current level over the past several hours.
Contract clarity
Will the rules resolve without ambiguity?
HighThe resolution rules are relatively specific, with a named source and a defined deadline.
From the latest trade tape (most recent 200 prints) — a live activity sample, not a lifetime total.
What this market actually measures
A presidential election is scheduled to take place in Brazil on October 4, 2026. This market will resolve according to the listed candidate that wins this election.
This summary shows the opening of the venue's official rules. ProbCast has not yet generated an independent plain-English interpretation for this contract — review the full rules before relying on it.
View full official resolution rules
A presidential election is scheduled to take place in Brazil on October 4, 2026. This market will resolve according to the listed candidate that wins this election. This market includes any potential second round. If the result of this election isn't known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other". This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., https://dadosabertos.tse.jus.br/).
What could move this market next?
- The market's deadline arrivesOctober 4, 2026 at 11:59 PM ET
The contract must resolve based on what has happened by this date.
Derived from the contract's own mechanics as of Sep 30, 9:11 PM ET. ProbCast does not list scheduled meetings, announcements, or data releases it cannot verify.
Advanced analysis (experimental)
Research signals — these models are still accumulating the history needed for full validation, and they can disagree with the headline read. Model confidence: high · expected error ±8 pts.
What's happening
Liquid, two-sided, and calm. The current price reads as settled consensus — the latest print is a reasonable summary of what the market believes.
- Liquid, two-sided, and calm — price behaving as settled consensus
The latest price is a usable but caveated read — weigh it with the market state.
More details — reliability score, dynamics, durability
- Stable consensus92%
- Choppy / mean-reverting5%
- Trend continuation3%
Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.
Secondary read: leaning toward Quote-driven.
A read-only classification of the market environment — how much weight the current price deserves as a read of consensus. It describes conditions, never a trade.
Market data
24h volume
$108.5K
Liquidity
$338.5K
Total volume
$7.2M
- Category
- Politics
- Venue
- Polymarket
- Open interest
- —
- Spread
- 0.1 pts
- Best bid
- 0.1%
- Best ask
- 0.2%
- 7-day range
- 0.1% – 0.1%
- Resolves
- Oct 4, 2026