US Inflation Report: September CPI Jumps to 3.7% on Gasoline Prices
Gasoline rose 9.1% in a month and 34% in a year, pushing headline inflation up. Core inflation was a calmer 2.6%.
The short answer: The latest US inflation report showed consumer prices rising 3.7% in the year to September 2026, up from 3.4% in August, according to the Bureau of Labor Statistics. Prices rose 0.6% in the month alone. Gasoline was the main driver, jumping 9.1% in September and 34.2% over the year. Core inflation, which strips out food and energy, was a calmer 2.6%.
US inflation report: the September numbers
| Measure | Month | Year |
|---|---|---|
| All items (headline CPI) | +0.6% | +3.7% |
| Core CPI (excluding food and energy) | +0.3% | +2.6% |
| Gasoline | +9.1% | +34.2% |
Source: US Bureau of Labor Statistics, September 2026 CPI release (published October 14). Monthly figures are seasonally adjusted.
Why it matters: inflation erodes what wages and savings can buy, and it shapes Federal Reserve policy, which in turn moves stock and bond prices.
Why energy is driving inflation
Higher oil prices, linked to conflict in the Middle East, have pushed gasoline costs sharply higher. Energy feeds quickly into headline inflation because people buy fuel every week. Over time, higher transport and production costs can also spread into other goods and services, which is what central banks most want to prevent.
Yes, but: core inflation at 2.6% shows that price pressures outside energy and food are much milder. If oil prices ease, headline inflation could fall back quickly.
How markets reacted
Hot inflation data strengthened the case for higher interest rates. The Fed held rates at 3.75%–4.00% on October 28 but two officials voted for a hike, and futures markets now expect an increase in December. Rising rate expectations weighed on growth stocks, contributing to the Nasdaq's 5.3% fall in October. Read more in our Fed rate decision analysis and the weekly stock market today wrap.
What it means for you
- Savers: rates on savings and short-term bonds are rising, partly offsetting inflation.
- Borrowers: variable-rate loans and credit cards may get more expensive.
- Investors: inflation and rate hikes tend to favor value sectors over high-growth stocks; see interest rates and stocks.
The bottom line: The September US inflation report showed a jump to 3.7%, driven mainly by gasoline. With core inflation steadier at 2.6%, the key question for markets is whether energy costs spread further, which the October report on November 10 will help answer.
Frequently asked questions
What is the difference between headline and core inflation?
Headline inflation includes all items. Core inflation excludes food and energy, which are volatile, to show the underlying trend.
When is the next CPI report?
The October 2026 CPI is scheduled for Tuesday, November 10, 2026, at 8:30 a.m. Eastern Time.
Figures as of November 1, 2026. This article is for education only and is not investment advice.
This article is for information only and is not investment, tax or legal advice. Prices and data may be delayed. Read our financial disclaimer.
Sources
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