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US Inflation Rises to 3.7% as Fed Rate-Hike Bets Persist
Why did US inflation rise to 3.7% in September?
US consumer prices rose 3.7% in the year to September, reported Wednesday, as gasoline jumped 9.1% in the month, and traders now see a December Fed rate hike as more likely than October.
Key numbers
| US CPI (12 months) | 3.7%from 3.4% in August |
|---|---|
| Core CPI (12 months) | 2.6%from 2.4% in August |
| Producer prices (PPI), monthly | +1.3%vs 0.6% expected |
| Gasoline CPI, monthly | +9.1%over half of the monthly rise |
| Oct. 27–28 Fed hike odds | 16%from 43.7% on Oct. 14 |
| December Fed hike odds | 89%vs 16% for October |
What happened
US consumer prices rose 3.7% in the year to September, reported Wednesday, as gasoline jumped 9.1% in the month, and traders now see a December Fed rate hike as more likely than October. Core prices, which leave out food and energy, rose 2.6%. Wholesale prices (the producer price index, or PPI) rose 1.3% in the month, more than double forecasts and the biggest jump since March 2022. Traders briefly gave a Fed hike on Oct. 27–28 a 43.7% chance after the report, but that slid to about 16% by Friday, while a December hike is priced near 89%.
Why it matters
US inflation at 3.7% means prices, led by gasoline, are climbing faster than a month ago, which squeezes household budgets. Higher inflation makes it more likely the Federal Reserve, the US central bank, raises borrowing costs again, and the average 30-year mortgage rate already rose to 7.56% after the report. Rate-hike worries also weighed on shares, with the S&P 500 down 0.4% that day.
Who this affects
- MarketbearishMedium impact
- Stocks slipped and Treasury yields jumped; bad for investors.
- CompanybearishMedium impact
- Households and borrowers face pricier fuel and mortgages.
- CompetitorsbearishMedium impact
- Euro area faces a similar squeeze, with inflation at 3.8%.
- IndustrybearishMedium impact
- Fuel-heavy businesses face higher costs as energy prices jump.
US vs Euro Area, United Kingdom
| United States— | 3.7% | 3.4% | Sep 2026 |
|---|---|---|---|
| Euro area— | 3.8% | 3.2% | Sep 2026 |
| United Kingdom— | 3.1% | 2.9% | Aug 2026 |
As of 2026-10-19
How we got here
CPI shows 3.7% inflation; October hike odds jump to 43.7% from about 20%.
Producer prices rise 1.3% in September, the most since March 2022.
October hike odds fall to 16%; December odds sit near 89%.
Eurostat confirms euro area inflation at 3.8%, up from 3.2%.
What to watch
- UK September inflation release; August reading was 3.1%.2026-10-21
- Fed rate decision; markets price about 16% for a hike, near 89% by December.2026-10-28
Educational content only. Not investment advice.
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