U.S. wholesale inflation accelerated to 5.4% in August 2026, up from 4.8% in July, as the ongoing military conflict with Iran continues to disrupt global energy markets. Benchmark U.S. crude oil topped $100 per barrel and Brent crude surpassed $105, driving retail gasoline prices to a national average of $4.28 per gallon and diesel to $5.98. These rising energy costs have intensified pressure on the Federal Reserve, with traders pricing in a 72% chance of an interest rate hike at the upcoming September meeting.
Wholesale inflation acceleration
- ▪The U.S. Labor Department's producer price index rose 5.4% in August 2026 from a year earlier, accelerating from a 4.8% annual increase in July 2026
- ▪Excluding volatile food and energy categories, U.S. core producer prices rose 4.6% in August 2026 compared to a year earlier, up from 4.2% in July 2026
- ▪U.S. wholesale prices increased 0.4% on a monthly basis from July to August 2026, following a 0.1% monthly increase the previous month
Oil price surge
- ▪President Donald Trump stated on September 9, 2026, that oil prices likely will not come down until after the U.S. midterm elections in November 2026
- ▪The benchmark U.S. crude oil price rose 6% on September 10, 2026, topping the $100 per barrel threshold for the first time since before Memorial Day
- ▪Brent crude oil prices rose 6.1% on September 10, 2026, climbing above $105 per barrel for the first time since May 2026
Iran conflict impact
- ▪Ongoing military conflict with Iran has clogged the global flow of crude oil and faded hopes for a deal to reopen the Strait of Hormuz
- ▪The European Central Bank raised its interest rates on September 10, 2026, citing inflationary pressures generated by the conflict in the Middle East
Diesel price increases
- ▪The wholesale price of diesel fuel rose 24.1% from July to August 2026, and has increased nearly 78% compared to the previous year
- ▪The U.S. national average diesel price reached $5.98 per gallon, representing a 61% increase from the $3.71 per gallon recorded a year earlier, according to AAA
Gasoline price increases
- ▪The U.S. national average price for a gallon of regular gasoline reached nearly $4.28, representing an increase of approximately 34% from a year earlier
- ▪The cost of a regular gallon of gasoline has risen 44% since the United States and Israel attacked Iran in late February 2026
Federal Reserve rate decision
- ▪Federal Reserve Chair Kevin Warsh stated in August 2026 that the central bank must be confident inflation is moving toward its 2% objective to avoid further rate hikes
- ▪Following the August 2026 economic reports, traders estimated a 72% probability that the Federal Reserve will raise interest rates at its meeting in September 2026
- ▪Federal Reserve Governor Christopher Waller suggested he would support keeping interest rates steady if the September 2026 consumer price index report shows cooling inflation
Debatable claims
- ▪The Federal Reserve should raise interest rates at its September 2026 meeting
- ▪The U.S. should negotiate a deal with Iran to reopen the Strait of Hormuz
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