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US Inflation Hits 3.4% Amid Gas Price Surge

By Markets Desk · 2026-09-12 · 1 min read
A gas pump nozzle resting on a concrete surface next to a blurred highway landscape
Illustration: Tradingbird

Consumer prices accelerated in August as fuel costs spiked, raising the likelihood of a Federal Reserve rate hike next week.

The US consumer price index rose 3.4% year-over-year in August. Monthly inflation accelerated to 0.4%, up from 0.1% in July. Gas prices drove much of the increase, jumping 3.9% in a single month. The nationwide average cost of a gallon reached $4.30 on Friday. This figure represents a 27% increase over the past year.

Renewed fighting in the Middle East has fueled the energy price spike. Diesel prices hit record highs above $6 per gallon. These costs are spreading to other sectors. Airline tickets rose 2.7% in August and are up 23% year-over-year. Hotel rooms increased 2.4% monthly. Shipping costs for goods delivered by truck are also climbing.

Fed Rate Hike Odds Climb

Market expectations for a Federal Reserve interest rate increase have shifted sharply. Investors now see an 80% chance of a hike on September 16. This represents a 10-point jump from Thursday. Fed Chair Kevin Warsh indicated rates could stay on hold only if disinflation continues. The August data did not show that trend.

Core inflation, which excludes food and energy, rose 0.3% in August. This is the largest monthly increase since April. Core prices are up 2.4% year-over-year, down from 2.5% in July. A potential rate hike would likely raise mortgage and auto loan costs. The 10-year Treasury yield reached a nearly three-year high before easing to 4.9%.

Political Pressure on Price Stability

The US administration is responding to voter concerns about affordability. President Donald Trump proposed $5,000 payments to adults if the GOP keeps a congressional majority. Treasury Secretary Scott Bessent has increased Treasury bond buybacks to lower long-term rates. These measures aim to counter the impact of rising consumer costs.

Midterm elections are seven weeks away. Inflation remains a central issue for voters. The Labor Department reports that prices for appliances and car repairs also jumped. Economists warn that high fuel costs will persist into September. This could force the Fed to act sooner rather than later. The source GN markets/inflation (en-US) notes the data intensifies economic uncertainty.

Based on reporting by latimes.com, compiled by the Tradingbird desk.

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