Inflation Cools to 0.4% Monthly but War-Driven Energy Prices Keep Annualized Rate Above 3%

October CPI rose 0.4%, down from September's 0.6%, as gas prices dipped below $4. But the Iran war keeps energy costs elevated, the Fed is hiking, and the government shutdown left BLS unable to report year-over-year figures.

US consumer prices rose 0.4% in October, a deceleration from September's 0.6% monthly increase but still above the pace consistent with the Federal Reserve's 2% annual target. The Bureau of Labor Statistics could not publish the standard year-over-year figure because the government shutdown prevented October 2025 data collection — a quiet institutional failure buried in the release.

The engine behind persistent inflation remains energy. The Iran war, which began in late February, has kept annualized CPI above 3% for months. Inflation hit a three-year high of 4.2% in May before fluctuating between 3.4% and 3.7%. Energy prices rose again in October, though at a slower pace than September. Diesel — the fuel that moves trucks, farming equipment, buses, and trains — is nearly $2.50 per gallon higher than a year ago, a cost embedded in the price of nearly everything Americans buy. Gas prices offered the month's clearest relief. The national average dropped from $4.41 at the start of October to $4.22 by month's end, and by Monday had fallen below $4 for the first time since July. That is still more than $1 per gallon above year-ago levels. The decline was enough to lift consumer sentiment among lower- and middle-wealth households, according to the University of Michigan's Survey of Consumers. The Federal Reserve raised interest rates in September for the first time since 2023 and is widely expected to hike again in December. Chair Kevin Warsh signaled resolve on 28 October: "Our job is to ensure that relative price changes in some sectors do not broaden across the economy, and that inflation expectations remain as they are anchored." October's labor market beat expectations, with unemployment holding just above 4%, giving the Fed room to tighten further. The structural problem is that rate hikes are a blunt tool for supply-driven inflation. Higher borrowing costs can slow demand, but they do not reopen the Strait of Hormuz or add refining capacity. The Fed is fighting a war premium with a demand lever — effective at the margins, potentially painful in the middle. The political consequences have already landed. Democrats won control of Congress in the midterms, in what both parties read as a punishment vote over prices. JD Vance and other Republicans explicitly pointed to gas prices as the decisive factor. The feedback loop is now set: energy-driven inflation shapes elections, elections shape fiscal responses, and the underlying supply shock remains external and unresolved. Meanwhile, wealthier consumers grew more anxious — not about gas but about an AI bubble. The University of Michigan survey found sentiment among those with the largest stock portfolios fell 5% amid market turbulence. Two inflation economies are emerging: one driven by fuel and food costs at the pump, the other by asset-price volatility in portfolios. The Fed must navigate both with a single interest rate.