U.S. inflation worsened last month to 3.7% as midterm elections near

U.S. inflation accelerated last month as gasoline and many other goods and services became more expensive, evidence that rising prices remain an economic challenge just a few weeks before midterm elections that have focused heavily on issues related to affordability.

The consumer price index rose 3.7 per cent in September compared with a year ago, the Labor Department said Wednesday, up from 3.4 per cent in August. On a monthly basis, costs jumped 0.6 per cent from August to September, the biggest gain in five months, up from a 0.4 per cent increase the previous month.

The figures underscore the lingering impact of the Iran war on gas prices and the stubborn persistence of inflation, which has ticked higher since the war began in late February. The rise isn’t all linked to oil and gas, as surging investment in data centers and AI has also pushed up prices for computer chips and the consumer electronics that use them. Elevated inflation has posed political problems for Republicans in Congress and is a challenge for the Federal Reserve, which is required by Congress to seek stable prices.

Excluding the volatile food and energy categories, core prices rose 2.6 per cent in September from a year ago, up from 2.4 per cent the previous month and higher than economists had expected. And they climbed 0.3 per cent from August to September, an elevated pace that, if it continued for a year, would run well above the Fed’s two per cent target.

Higher inflation will likely put more pressure on the Fed to lift its key interest rate at its next meeting Oct. 27-28. Economists noted that the report showed price increases were spread more broadly across the economy than in recent months.

“The report was worse than expected,” Bill Adams, chief U.S. economist at Fifth Third Bank, said in a note to clients. “Price increases were widespread … affecting a range of durable goods, nondurables, and services.”

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Wednesday’s report is the last major inflation data to be released before the upcoming elections. Ongoing inflation has taken a toll on Trump’s standing with U.S. voters. A poll by The Associated Press-NORC Center for Public Affairs Research found that just 17 per cent of U.S. adults approve of his handling of the cost of living issue. And only 26 per cent approve of his handling of the economy overall, a new low.

Gas prices jumped 9.1 per cent just from August to September, the government’s consumer price index report said. Rising gas costs are a highly visible sign of inflation and often drive down measures of consumer sentiment about the economy.

With fuel much more expensive, air fares rose 1.2 per cent last month and have soared 22 per cent compared with a year ago. Hotel prices rose two per cent from August to September and are up 4.4 per cent compared with a year earlier.

Consumers saw some relief in grocery prices, which actually declined 0.1 per cent last month and are up just 1.8 per cent from a year ago. Ground beef prices fell 0.8 per cent in September, though they are still up 5.4 per cent from last year.

The cost of toys, new and used cars, sporting goods, and shoes all rose at a rapid clip last month, the government said.

Federal Reserve officials are watching inflation data closely to determine whether they need to raise their short-term interest rate further, and by how much.

Fed Chairman Kevin Warsh said last month that inflation isn’t moving quickly enough back to the central bank’s target, causing the Fed to hike rates for the first time in three years, to about 3.9 per cent.

Yet some key Fed officials have suggested the central bank can wait before increasing rates again. The Fed has a policy meeting Oct. 27-28, but most Wall Street investors expect it to hold rates then, and potentially implement another hike in December. Fed officials have penciled in just one more rate hike this year.

By raising borrowing costs, the Fed hopes to slow spending and growth and cool price increases. Yet much of the current inflation comes from supply shocks, such as the Iran war’s disruption to oil and gas supplies, and higher interest rates can’t address those bottlenecks.

Warsh has said his goal is to keep the gas price spike from seeping into more areas of the economy. It’s already pushed up the price of air fares about 22 per cent from a year ago.

Prices at the pump have ticked lower in the past two weeks to a nationwide average of US$4.33 a gallon, according to AAA, though they remain higher than a month ago.

Those costs raise shipping and other expenses for many large and small businesses, some of which are forced to pass the cost to consumers. Last week, PepsiCo said that it will raise prices for its snack foods, including Doritos, Ruffles, Sun Chips, and some sodas to offset higher costs for fuel, aluminum, and food ingredients.

The artificial intelligence buildout has also sharply elevated the cost of semiconductors, computer equipment, and electrical components, which have been passed on to consumers in the form of more expensive electronics such as gaming devices, laptops, and smartphones.

Goldman Sachs estimated in a report Tuesday that the AI buildout has added about a half-percentage point to the annual inflation rate, according to the Fed’s preferred inflation gauge.

On September 1, Nintendo increased the price for its Switch 2 gaming system by 11 per cent to $499.99. And Apple’s newest iPhone, the iPhone 17, cost about 10 per cent more than its previous upgrade, though some of that likely reflects greater capabilities.