US Inflation Rekindles October Rate Hike

US inflation accelerated in September, reviving speculation that the Federal Reserve could raise interest rates at its October meeting. The stronger-than-expected figures complicate efforts to contain prices without placing further pressure on economic activity.

The Consumer Price Index increased 3.7% year on year, above economists’ 3.6% forecast and August’s 3.4% reading. Monthly inflation reached 0.6%, against expectations of 0.5%. Core inflation, which excludes food and energy, rose 0.3% during the month and 2.6% annually, also exceeding forecasts.

Energy was a major contributor. Petrol prices rose 9.1% in September, accounting for more than half the overall monthly increase, while the wider energy index climbed 5.2%. However, stronger core figures suggest that price pressures extend beyond volatile fuel costs.

Financial markets quickly reconsidered the policy outlook. Traders raised the implied probability of a quarter-point October increase to 43.7%, from roughly 20% before the release. The ten-year US Treasury yield climbed above 5.3%, reflecting expectations that borrowing costs could remain elevated.

For businesses and consumers, a further rate rise would increase financing costs and could restrain investment, borrowing and discretionary spending. Banks may benefit from higher lending rates, although weaker credit demand and repayment pressures remain potential risks. The latest data therefore presents a difficult balance for industries already navigating expensive capital and persistent operating costs.

Federal Reserve officials remain divided over timing. Some favour further tightening before year-end, while others prefer assessing incoming evidence. With inflation still above the central bank’s 2% target, October remains uncertain, but the likelihood of additional tightening later this year has increased.