US inflation rises to 3.7% as gasoline prices jump 9.1%

US consumer price inflation accelerated to 3.7% in the year to September, up from 3.4% in August and faster than the 3.6% economists had expected, Theguardian reported. The reading, published on 14 October 2026, landed squarely on the cost of motor fuel.

Gasoline prices rose 9.1% during September and stood 34% above their level a year earlier. Energy costs across the US climbed 5.2% in the month and were 20% higher on an annual basis. Consumer prices overall were up 0.6% in September alone.

Also read: US Inflation Hits 3.7% in Final Report Before Midterms

Key facts

• US CPI rose 3.7% in the year to September, up from 3.4% in August, against a 3.6% forecast.
• Gasoline jumped 9.1% in September and was 34% higher than a year earlier.
• Core inflation, which strips out food and energy, rose to 2.6% from 2.4% in August.
• The dollar index rose 0.5% to an 18-month high, its strongest since April 2025.
• CMEFedwatch put the probability of a quarter-point Fed hike in October at 43%, up from 22% a day earlier.

Pressure reaches the core, not just the pump

The headline damage came from fuel, but the report showed prices spreading into the wider economy. Core inflation, which excludes food and energy, rose to 2.6% from 2.4% in August. George Brown, senior economist at Schroders, said the report indicated the inflation problem ran deeper than energy and that domestic price pressures were becoming more entrenched rather than easing.

Other details were mixed. The shelter index, which tracks housing costs, rose 0.4% after a 0.3% gain in August. Food prices were unchanged in September, with food at home down 0.1% and food away from home up 0.2%; on an annual basis food was 2.5% higher than a year earlier.

Also read: US Dollar Holds Firm as Consumer Sentiment Hits 46.3

Markets reprice a Fed move and the dollar rallies

Traders responded by raising the odds of near-term tightening. According to CMEFedwatch, a quarter-point increase at the Federal Reserve’s October meeting was a 43% chance, compared with 22% the previous day. Stephen Brown, chief North America economist at Capital Economics, said the upside surprise in core CPI was broad-based rather than down to obvious temporary factors, bringing an October hike back into play.

The dollar index climbed 0.5% to an 18-month high, its best level since April 2025. Richard Carter, head of fixed interest research at Quilter Cheviot, described the data as a blow to Donald Trump before November’s midterms and warned another Fed hike this year could not be ruled out, adding that ten-year Treasury yields might continue to march higher.

Why it matters

Inflation at 3.7% puts the US further from target than it was a month ago, and the rise in core prices matters more than the fuel spike because it points to demand-driven pressure that central bankers cannot dismiss as a temporary shock. For American households, the immediate squeeze is at the pump. For investors, the calculation has shifted from how soon rates fall to whether they rise again, which supports the dollar and keeps bond yields under scrutiny. The timing is awkward for the administration, which had been positioning itself around lower inflation and the prospect of rate cuts ahead of the midterms.

What to watch

The Federal Reserve’s October meeting is the next concrete checkpoint, with futures pricing a 43% chance of a quarter-point increase. Further clues on the energy side will come from the supply response to the US-Russia diesel deal, which the IEA has already warned is unlikely to add much to the market, and from the next inflation print.

This article is not financial advice. Markets are volatile and uncertain, and interest rate expectations can change quickly.

Written by

Benjamin

Benjamin Carter covers business, finance, and the stock market for StockPil, focusing on the trends and data that matter to everyday investors.

Source: The Guardian