September CPI: Results, market reaction, and key takeaway
Headline CPI rose 0.6% MoM and 3.7% YoY in September, up from 0.4% and 3.4% in August. Gasoline rose 9.1%, accounting for over half of the monthly headline increase. Core CPI rose 0.3% MoM and 2.6% YoY, versus 0.3% and 2.4% in August.
📊 Results
Actual Reading
💡 Key Takeaway
Energy drove most of the headline acceleration, while core inflation also firmed year over year. This raises near-term rate sensitivity for AI equities without establishing a change in the longer-run productivity-led disinflation thesis.
📖 Why This Matters
September inflation, two weeks before the Fed decides.
September CPI actual vs expected
| Release date | Wednesday, October 14, 2026 at 08:30 ET |
|---|---|
| Event type | CPI |
| Actual | 3.7% YoY |
| Prior | 3.4% YoY |
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🔗 Related Events
January CPI
2.4% vs 2.5% expected — lowest since May. Core at 2.5%, lowest since March 2021. June rate cut odds jumped to 70%.
February CPI
Headline CPI rose 2.4% YoY, matching January, with a 0.3% monthly gain. Sticky shelter and food kept pressure on the Fed, but the print largely met expectations.
March CPI
Headline CPI jumped 0.9% MoM and 3.3% YoY in March, exactly matching consensus, as gasoline and war-related energy pressure hit the print hard. Core CPI came in at 0.2% MoM and 2.6% YoY, softer than feared, which kept the print from becoming a full-blown policy shock.