58% — Bank of Brazil decision in August
Leader: 25 bps decrease at 58% · Polymarket 58% · 5 contracts · $648 volume · medium confidence
Updated 2026-05-28 21:23:35 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 5 outcomes.

Why this matters:
Markets are currently pricing a 59% likelihood that Brazil's central bank will cut its key interest rate by 25 basis points at its August 2026 meeting, with a 35% probability assigned to holding rates steady. This reflects expectations about inflation trends, economic growth, and monetary policy direction in Brazil over the coming months. The pricing suggests traders believe a quarter-point reduction is more likely than no change, though the gap is meaningful rather than overwhelming. The August decision will depend heavily on inflation data releases between now and then, as well as broader economic indicators like employment and GDP growth. Market participants will be watching monthly inflation reports and any forward guidance from central bank officials to refine their expectations. The resolution of this contract will occur when the central bank announces its official policy decision in August.

Key factors:
- Market assigns 59% to 25bp cut vs 35% to no change, indicating modest but not dominant conviction in easing
- Volume concentration in 'No Change' contract ($257 24h vol) versus 'Decrease' contract ($75 24h vol) suggests disagreement among traders on the baseline scenario
- Inflation data releases and employment figures between now and August will be primary drivers of contract repricing
- Central bank forward guidance and communications will influence expectations ahead of the August meeting date
- Very low probabilities assigned to rate increases (5% and 3% combined) indicate minimal market expectation of tightening

Contracts:
- Bank of Brazil decision in August?: 25 bps decrease — 58¢ Polymarket $261 (weight 40%)
- Bank of Brazil decision in August?: No Change — 35¢ Polymarket $99 (weight 15%)
- Bank of Brazil decision in August?: 50+ bps decrease — 8¢ Polymarket $89 (weight 14%)
- Bank of Brazil decision in August?: 50+ bps increase — 5¢ Polymarket $89 (weight 14%)
- Bank of Brazil decision in August?: 25 bps increase — 4¢ Polymarket $110 (weight 17%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-05-28T21:20:12.023Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "58% per prediction markets (SimpleFunctions, May 2026)"
Canonical: https://simplefunctions.dev/answer/bank-of-brazil-decision-august
Full data: https://simplefunctions.dev/api/public/query?q=Bank%20of%20Brazil%20decision%20in%20August
Provider: SimpleFunctions — https://simplefunctions.dev