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Chart of the dayThursday 15 October

US petrol prices jump 9.1% in September

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Chart: US petrol prices jump 9.1% in September. Monthly change in US petrol prices, seasonally adjusted, January 2022 to September 2026, in percent. Annual inflation reached 3.7%; core was 2.6%.
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What the chart shows

Inflation in the US reached 3.7% in the year to September, up from 3.4% in August, and most of the surprise came from petrol. Pump prices rose 9.1% in the month. Core inflation, without food and energy, was 2.6%.

Set beside every month since January 2022, September's rise is tall but not alone. In March this year petrol rose 21.2% in a single month, and in March 2022 it rose 16.3%. The falls between those spikes are why core inflation barely moves while the headline rate swings.

The question now is whether the Fed answers petrol with a rate rise this month. If it does, mortgage holders will feel it well before the oil price does.

The story behind it

Petrol pushed US inflation to 3.7%, and the Fed's next meeting is suddenly live From Running Hot · Thursday 15 October Read the edition →

On the calendar

The US releases that move markets, in New Zealand and Australian time. Economic calendar →

The numbers

Monthly change in US petrol prices, seasonally adjusted, January 2022 to September 2026, in percent. Annual inflation reached 3.7%; core was 2.6%.

Monthly change in US petrol pricesDot
Jan 2022−0.2%
Feb 2022+3.3%
Mar 2022+16.3%
Apr 2022−6.1%
May 2022+5.2%
Jun 2022+10.3%
Jul 2022−8.4%
Aug 2022−10.7%
Sep 2022−3.7%
Oct 2022+4.5%
Nov 2022−0.3%
Dec 2022−8.1%
Jan 2023+2.7%
Feb 2023−0.3%
Mar 2023−2.1%
Apr 2023−0.1%
May 2023−3.4%
Jun 2023+0.9%
Jul 2023−0.3%
Aug 2023+7.7%
Sep 2023+2.8%
Oct 2023−3.7%
Nov 2023−4.2%
Dec 2023−1.1%
Jan 2024−2.0%
Feb 2024+2.0%
Mar 2024+3.3%
Apr 2024−0.1%
May 2024−2.2%
Jun 2024−3.8%
Jul 2024−0.04%
Aug 2024−1.3%
Sep 2024−2.8%
Oct 2024−0.2%
Nov 2024+0.1%
Dec 2024+4.0%
Jan 2025+1.2%
Feb 2025−1.2%
Mar 2025−3.8%
Apr 2025−2.4%
May 2025−2.1%
Jun 2025+0.1%
Jul 2025−1.2%
Aug 2025+1.6%
Sep 2025+3.6%
Oct 2025−1.3%
Nov 2025+2.7%
Dec 2025−0.3%
Jan 2026−3.2%
Feb 2026+0.8%
Mar 2026+21.2%
Apr 2026+5.4%
May 2026+7.0%
Jun 2026−9.7%
Jul 2026−2.9%
Aug 2026+3.9%
Sep 2026+9.1%

57 rows: scroll the table for the rest.

How we make these charts: one chart a day from a story in the edition, drawn from the figures the story names and checked against the sources named on the chart before it is published. General information only, not financial advice.

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