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Home/Politics/Will Jair Bolsonaro win the 2026 Brazilian presidential election?
PolymarketPoliticsUpdated 5m ago

Will Jair Bolsonaro win the 2026 Brazilian presidential election?

Market probability
1.1%
Little changed over 24 hours
54 days until the event deadline
Deadline: October 3, 2026 at 8:00 PM ET

No meaningful repricing — the probability is steady.

The pricing has partial support: 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?

Moderate

The pricing has partial support: healthy trading volume and market depth, a tight spread.

Consensus stability

Has the market settled at the new probability?

Stable

The probability has held near its current level over the past several hours.

Contract clarity

Will the rules resolve without ambiguity?

High

The resolution rules are relatively specific, with a named source and a defined deadline.

Recent trade activity$383.7 traded

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 3, 2026 at 8:00 PM ET

    The contract must resolve based on what has happened by this date.

Derived from the contract's own mechanics as of Aug 10, 6:53 AM 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: low · expected error ±13 pts.

Quote-drivenLegacy movement classifier: watch

What's happening

medium classifier confidence
Quote-driven

A tight, deep, quote-driven book with little executed flow. The price is stable but reflects resting quotes more than active trading.

Market data

24h volume

$30.6K

Liquidity

$317K

Total volume

$5.5M

Change (pts)1H0.06H+0.124H+0.17D+0.1
Score breakdown — Movement, Liquidity & Trust

ProbCast Trust Score

57/ 100 · Watch

Reasonably supported. Generally reliable, with minor caveats. Main caveat: thin liquidity.

ProbCast measures how reliable this market probability appears — not what to trade.

Movement2

Magnitude of recent probability change

Liquidity80
ProbCast — Odds Reliability

Know whether prediction-market odds can be trusted. ProbCast analyzes liquidity, market activity, spreads, and price movement to help distinguish meaningful repricing from thin-market noise.

Questions? Chat with us on Telegram
TodayTop MoversEventsAll MarketsWhat ChangedVenue DivergencePolymarket vs KalshiMethodologyCoverageMeta's ArenaWatchlistTerms of UsePrivacyCrypto
  • Tight spread on a liquid, calm market

The latest price is a usable but caveated read — weigh it with the market state.

More details — reliability score, dynamics, durability
Reliability score
57Medium
Where the price path tends to go next393 observed
  • Choppy / mean-reverting93%
  • Thin-liquidity spike2%
  • Stable consensus2%

Short-term motion of the price line (~1h), distinct from the environment above — not a prediction of the final outcome.

DurabilityHigh· half-life —
PredictabilityStable

Secondary read: leaning toward Thin market.

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.

Category
Politics
Venue
Polymarket
Open interest
—
Spread
0.1 pts
Best bid
1.0%
Best ask
1.1%
7-day range
1.0% – 1.1%
Resolves
Oct 3, 2026

Depth of the order book and volume

Trust breakdown

57/100 · Medium

Reasonably supported. Generally reliable, with minor caveats. Main caveat: thin liquidity.

  • Liquidity anchor+59
  • Price steadiness+29
  • Thin liquidity-20
  • Limited history-8
Trust score57 / 100
How these scores work →
View on Polymarket

ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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ProbCast provides prediction-market data and analytics for informational purposes only. Not financial, trading, betting, investment, legal, or tax advice. ProbCast is not a betting platform, exchange, or broker and does not provide buy or sell recommendations. Intended for users 18+; availability of prediction-market activity varies by jurisdiction. Venue data is aggregated from third parties and may be delayed or inaccurate. See our Terms of Use.

Market-implied probabilities can be wrong, illiquid, manipulated, or affected by ambiguous resolution rules.

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