Brazil Annual Inflation 2026

The question behind the headline

The annual inflation question for Brazil uses the twelve months ending in December. It does not average the monthly inflation rates observed throughout the year, so the final months can change the answer substantially.

At the October 4, 2026 market snapshot, 5.00-5.49% carried a 49.15% Yes price. Other open contracts included 5.50-5.99% at 29.65%; 6.00-6.49% at 10.35%. ^[1]

The condition that changes the answer

Use the official December 2026 twelve-month IPCA change at two decimals precision. Use the index and annual comparison identified in the named statistical release. ^[1]

The contract expects the release in January 12, 2027. If missing by the next month’s scheduled release date, use the last available month. ^[1]

Evidence for and against the leading outcome

The leading bracket needs the final published annual change to land inside its boundaries, not just move in the same direction.

Base effects and new monthly price movements can shift the December comparison across a boundary while the broad inflation narrative stays similar.

The next useful checks are december-over-December comparison; the exact index and rounding precision; release calendar and missing-data fallback. The linked primary references make the process and named data source inspectable. ^[2][3]

A closer look at the market

The leading listed option was 19.50 percentage points above the next quoted option. That difference measures market pricing, not a vote margin or a measured lead in real-world evidence. A leading price below 50% means the market can favor this option over each rival without treating it as more likely than all alternatives combined.

The event had approximately $146,820 in total traded volume at observation. That is a record of turnover across this event, not a count of distinct people, a search-volume estimate or proof that every child contract is easy to trade. The analytical quote is fixed to the timestamp shown here; later live prices can differ. ^[1]

The useful conclusion is conditional: the leading option needs to satisfy the whole outcome definition, not just one favorable part of the story.