Inflation hit 3.7% in September: what is driving it

US consumer prices rose 0.6% in September and 3.7% from a year earlier, up from 3.4% in August, according to the Bureau of Labor Statistics report released October 14.

Headline vs core

Core CPI, which excludes food and energy, rose 0.3% in the month and 2.6% over twelve months, up from 2.4% in August. Core is rising more slowly than the headline figure, which tells you energy is doing much of the work.

Gasoline

Gasoline was up 34.2% from a year earlier, after a 27.4% annual rise in August. The BLS noted that gasoline accounted for more than half of the monthly increase in the all-items index.

Shelter

Shelter is the largest single weight in the basket and has been rising at a steadier pace, around 3.2% a year in recent readings.

Why it matters for rates

A hotter-than-expected print pushes the Fed toward higher rates. Economists quoted in coverage said the report added to the case for caution, and traders raised their bets on a hike.

What to take from it

Energy shocks can lift headline inflation quickly and reverse just as quickly if oil falls. The question for policymakers is whether higher prices spread into other categories. Watch core and services inflation for that signal.

Educational content, not investment advice. Figures as reported on November 9, 2026; check primary sources before acting.