Inflation runs hotter than expected at 3.7% in September, the last CPI report before the midterms

Consumer prices in the United States rose 3.7% in September, exceeding expectations set by economists. This was the highest increase since April and signaled the lingering impact of the Iran war on gas prices. The Labor Department will release the data on Wednesday, which will likely highlight the ongoing challenge of inflation ahead of the midterm elections.

Inflation on a monthly basis increased by 0.6% from August to September, marking the largest jump since April. Core prices, which exclude volatile food and energy categories, rose 2.5% in September from a year earlier, slightly higher than the 2.4% increase in August. This is notably close to the Federal Reserve's 2% inflation target, although prices have been hovering around this level since January.

Elevated inflation has posed political challenges for Republicans and is a concern for the Federal Reserve, which aims to maintain stable prices. Federal Reserve Chair Kevin Warsh expressed disappointment, stating that inflation is too high and has been for too long. The central bank is closely watching inflation data to decide on further interest rate hikes. The Fed is set to convene on October 27-28, with most analysts expecting another rate increase and possibly another in December.

While some Fed officials believe the central bank can wait before taking further action, the current inflation, primarily driven by supply shocks like the Iran war's disruption to oil and gas supplies, is difficult to address with higher interest rates alone. Gas prices have spiked, contributing significantly to the overall inflation rate, with a 9% increase from August to September, pushing up costs for businesses and consumers alike.