TOTAL VOLUME:
$66b
24H VOL:
$398,877,831
24H TRANSACTIONS:
647,445,881
OPEN INTEREST:
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622,934
Markets across
14,083
events
MATCHED EVENTS:
1,257
PLATFORM COVERAGE:
4
Polymarket:
49%
VS.
Kalshi:
51%
Brazil Annual Inflation 2026? Odds & Prediction Markets
Will inflation in Brazil be above 3.25% in Dec 2025?
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Description
This event group tracks Brazil's annual inflation rate for 2026, measured by the 12-month IPCA (Extended National Consumer Price Index) as reported by IBGE for December 2026. Polymarket offers 11 binary markets covering specific inflation bands (e.g., 3.50%-3.99%, 4.00%-4.49%), while Kalshi offers 10 binary markets using threshold-based logic (above 3.25%, above 3.50%, etc.). Both platforms resolve using the same official IBGE data source.
PredictionHero - Resolution Divergence Alerts (RDA)
Divergence Detected
Issue:
Polymarket uses mutually exclusive range-based markets while Kalshi uses overlapping threshold-based markets. Both resolve using the same IBGE data source, but the market structures create different outcome spaces and require separate position analysis.Hero Tip:
Polymarket and Kalshi markets are structurally incompatible despite using the same underlying metric. In Polymarket, exactly one band resolves YES. In Kalshi, multiple thresholds can resolve YES simultaneously. Do not cross-hedge or assume equivalence between platforms. Treat each platform's market set as independent and map your thesis to the appropriate structure: use Polymarket for precise range bets, use Kalshi for directional threshold exposure.Critical Divergence Points:
Polymarket:
Range-based binary markets covering 11 contiguous inflation bands: <3.00%, 3.00%-3.49%, 3.50%-3.99%, 4.00%-4.49%, 4.50%-4.99%, 5.00%-5.49%, 5.50%-5.99%, 6.00%-6.49%, 6.50%-6.99%, and >=7.00%. Exactly one market resolves YES based on the December 2026 IPCA 12-month rate reported by IBGE to two decimal places. Resolution source: IBGE monthly IPCA news release for December 2026, scheduled for January 12, 2027.Kalshi:
Threshold-based binary markets with 10 cumulative thresholds: above 3.25%, above 3.50%, above 3.75%, above 4.00%, above 4.25%, above 4.50%, above 4.75%, above 5.00%, above 5.25%, above 5.50%. Multiple markets can resolve YES simultaneously if the December 2026 IPCA 12-month rate exceeds multiple thresholds. Resolution source: same IBGE December 2026 IPCA report.
Polymarket
This is a market about the variation of consumer prices in Brazil over the 12-month period ending December 2026, as reported by the Brazilian Institute of Geography and Statistics (IBGE). This market will resolve according to the percentage change in the Extended National Consumer Price Index (IPCA) during the 12-month period ending December 2026 according to the monthly IBGE report. The resolution source for this market will be the IBGE Extended National Consumer Price Index monthly report released for December 2026, currently scheduled to be released on January 12, 2027. Resolution of this market will take place upon release of the aforementioned data. If no data for the specified month is released by the date the next month's data is scheduled to be released, this market will resolve based on data from the last available month. You can find the relevant figure by locating the report for December 2026 on the Press Releases page (https://agenciadenoticias.ibge.gov.br/en/agencia-press-room.html), locating the Period-Rate table and finding the IPCA growth rate figure in the column labeled "Rate" and the Row labeled “Cumulative in the year / 12 Months”. Changes in the IBGE’s reporting format will not disqualify a published relevant figure from counting. Note: the resolution source for this market will be the official monthly IBGE IPCA news release which reports inflation during 12-month periods to two decimal points (e.g. 4.26%). Thus, this is the level of precision that will be used when resolving the market. For the full release schedule, see: https://www.ibge.gov.br/en/calendar.html
Kalshi
These markets assess Brazil's 12-month inflation rate as measured in December 2026 across a series of threshold levels. Each market corresponds to a specific inflation threshold, with resolution to Yes occurring if the official 12-month inflation rate exceeds that threshold. The thresholds range from 3.25% at the lowest level to 5.50% at the highest level, incrementing by 0.25 percentage points. Resolution is based on the actual 12-month inflation rate reported by Brazil's official statistical authority for December 2026. Each threshold represents a distinct market outcome, allowing participants to express granular views on the likely range of inflation outcomes. The official inflation data source and measurement methodology follow Brazil's standard economic reporting practices.
Frequently asked questions
Prediction markets often diverge from consensus economist surveys because traders incorporate real-time sentiment, tail-risk pricing, and forward-looking positioning that traditional forecasts may lag. While central bank guidance and inflation models inform both, this market reflects active hedging and speculative flows that can push odds above or below median analyst expectations. Comparing current odds to recent Brazil inflation surveys from major financial institutions reveals whether traders are pricing in more hawkish or dovish outcomes than the consensus view.
Kalshi and Polymarket may quote different odds due to variations in liquidity, user base composition, and contract design. Kalshi and Polymarket can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. For instance, one platform may weight near-term inflation data more heavily, while the other prices in longer-dated policy shifts. Arbitrage traders typically narrow such gaps, but temporary spreads of 51.9 percentage points can persist if order-book depth differs or if each platform attracts traders with distinct macroeconomic views on Brazil's inflation trajectory.
This market resolves around Jan 12, 2027, once Brazil's official 2026 annual inflation figure is published and verified against credible public sources. The outcome is determined by comparing the final year-over-year inflation rate to the specific thresholds defined in each contract. Traders holding positions through resolution will see their payouts calculated based on whether the actual inflation rate falls within, above, or below the predicted bands they wagered on.
Key catalysts include Brazil's central bank policy decisions, currency fluctuations against the US dollar, commodity price shocks, and monthly inflation data releases. Political or fiscal developments affecting government spending and debt dynamics can also shift expectations. Real-time CPI prints throughout 2026 will provide concrete anchors for repricing, while global interest-rate trends and emerging-market capital flows may influence long-dated inflation bets. Traders monitor these signals continuously to adjust positions ahead of resolution.
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