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US Inflation Accelerates to 3.4 Percent Amid Oil Spike

By Markets Desk · 2026-09-12 · 2 min read
A gas pump nozzle resting on a concrete surface next to a stack of generic currency bills
Illustration: Tradingbird

US inflation held at 3.4 percent year over year but accelerated to 0.4 percent month over month. Gas prices jumped 3.9 percent in August, driving the monthly increase. Market odds for a Fed rate hike rose above 80 percent.

US consumer prices rose 3.4 percent in August compared with the same month last year. The Labor Department reported a 0.4 percent monthly increase. This figure is four times the 0.1 percent rise seen in July. Gasoline costs jumped 3.9 percent during the month. The average national price for a gallon reached 4.30 dollars. This level is 7 percent higher than in July and 27 percent above the prior year.

The acceleration in monthly inflation raises pressure on the Federal Reserve. Officials must decide whether to raise benchmark rates in September. Investors now see an 80 percent chance of a rate hike. This probability increased by 10 points following the data release. The Fed previously indicated that continued disinflation was required to hold rates steady. The August data did not show that trend.

Fuel Costs Drive Broad Price Increases

Diesel prices surpassed 6 dollars per gallon. This record high increases shipping costs for goods. Airline tickets rose 2.7 percent in August. Ticket prices are now 23 percent higher than a year ago. Hotel room rates climbed 2.4 percent for the month. Car repair costs increased 1.1 percent. These rises extend beyond fuel to services and maintenance.

Core Inflation Shows Mixed Signals

Core prices, which exclude food and energy, rose 2.4 percent year over year. This is a slight decline from 2.5 percent in July. It marks the third consecutive monthly drop in the annual rate. However, core prices rose 0.3 percent from July to August. This is the largest monthly increase since April. The data suggests underlying inflation remains sticky.

Policy Responses Target Borrowing Costs

Treasury Secretary Scott Bessent is buying back government bonds. This action aims to keep long-term interest rates low. The 10-year Treasury yield reached 4.9 percent on Friday. It had hit a nearly three-year high the day before. The Trump administration proposes 5,000 dollar payments to adults. This plan requires congressional approval and may add to inflation pressures.

Households report higher costs for rent and food. One worker noted a 200 dollar monthly rent increase. His rent reached 2,300 dollars. He cites reduced dining out and older vehicles as coping mechanisms. The affordability challenge persists ahead of midterm elections. The Federal Reserve meets next week to set policy. The decision will impact mortgage and auto loan rates.

Based on reporting by WTOP News, compiled by the Tradingbird desk.

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