Inflation in September 2026 (CPI YoY)
3.6%median
2.9%5.1%
Median 3.6%Middle half 3.53% – 3.67%
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September Inflation US - Annual
The odds
3.65%median
2.85%4.05%
Median 3.65%Middle half 3.59% – 3.71%
How the odds have moved
Median: 3.66% on Oct 13, 3.65% now.
The median price the market implied over time, and its middle half (the band), read from every strike's prices on Polymarket.
Every outcome
| Outcome | Chance | Day | Bid | Ask | Traded |
|---|---|---|---|---|---|
| ≤2.9% | <1% | 0¢ | 0¢ | $8.6K | |
| 3.0% | <1% | 0¢ | 0¢ | $10.2K | |
| 3.1% | <1% | 0¢ | $10.5K | ||
| 3.2% | <1% | 0¢ | $8.6K | ||
| 3.3% | <1% | 0¢ | $9.8K | ||
| 3.4% | 1% | 1¢ | 1¢ | $17.9K | |
| 3.5% | 7% | 7¢ | 7¢ | $28.2K | |
| 3.6% | 43% | ▲ 3 | 43¢ | 44¢ | $41.1K |
| 3.7% | 37% | ▼ 5 | 37¢ | 38¢ | $32.5K |
| 3.8% | 11% | ▲ 3 | 10¢ | 11¢ | $19.1K |
| 3.9% | <1% | 0¢ | 1¢ | $12.8K | |
| ≥4.0% | <1% | 0¢ | 0¢ | $12.8K |
The same question on Kalshi
Shown side by side, not averaged: each venue's rules decide its own market.
The same question on Kalshi
CPI year-over-year in Sep 2026?
3.65%median
1.95%3.95%
Median 3.65%Middle half 3.58% – 3.72%
Shown side by side, not averaged: each venue's rules decide its own market.
More on this question
All inflation & jobs ›Inflation in November 2026 (CPI YoY)
3.82%median
2.9%5.1%
Median 3.82%Middle half 3.63% – 4.01%
Inflation in December 2026 (CPI YoY)
3.63%median
2.9%5.1%
Median 3.63%Middle half 3.45% – 3.97%
CPI in September (In Sep 2026)
0.53%median
-0.5%1%
Median 0.53%Middle half 0.46% – 0.58%
Core inflation in September 2026 (Core CPI YoY)
2.38%median
2%3.6%
Median 2.38%Middle half 2.33% – 2.45%
CPI in October (In Oct 2026)
0.23%median
-0.2%1.1%
Median 0.23%Middle half 0.11% – 0.34%
CPI in November (In Nov 2026)
0.18%median
-0.2%0.6%
Median 0.18%Middle half 0.02% – 0.29%
Odds are traders' prices on Kalshi and Polymarket, not forecasts by 4Search. Read from the venues 3 min ago. Prices may be delayed up to 15 min. Not investment advice.
Market data is provided for information only and comes from free public sources. Prices may be delayed up to 15 minutes; data may be incomplete or inaccurate. Nothing on this page is investment advice or a recommendation to buy or sell any security. News and coverage analytics are drawn from the 4Search index. Terms of use.