August CPI Lifts Fed Hike Odds Ahead of Wednesday Decision

Gasoline supplied more than one-third of August’s monthly inflation increase, but the market’s sharper concern was what happened beneath the energy surge. U.S. consumer prices rose 0.4% from July and 3.4% from a year earlier, while core CPI accelerated to 0.3% for the month, according to the Bureau of Labor Statistics.

That core reading, which excludes food and energy, was up from July’s 0.2% increase. On an annual basis, core inflation held at 2.4%, still above the Federal Reserve’s 2% target. Shelter costs rose 0.3% during the month, while used cars, new vehicles, airline fares, education and lodging also recorded increases.

The report helped push traders toward a quarter-point rate increase at the Federal Open Market Committee’s September 15-16 meeting. Futures markets put the probability of a hike near 90% on September 14, up sharply from roughly 70% before the inflation release.

The policy shift marks a dramatic change from earlier in the year, when Fed officials had been expected to cut rates as concerns about employment grew. The benchmark federal funds rate is currently around 3.6%, and a 25-basis-point increase would be the first hike in three years.

Energy is complicating the decision. The gasoline index rose 3.9% in August, energy prices climbed 2.1%, and renewed conflict involving Iran has pushed oil and fuel prices higher. The Fed cannot produce more oil or repair a disrupted supply chain, but officials will worry that a temporary energy shock becomes embedded in wages, services and consumer expectations.

Chair Kevin Warsh has already emphasized that recent inflation data do not show enough improvement. That rhetoric has raised the cost of holding rates steady: a no-change decision could unsettle bond investors who have been demanding more compensation for inflation risk.

A hike, however, would open a more difficult conversation. Markets will want to know whether policymakers see one increase as insurance or the beginning of a broader tightening cycle. Longer-term Treasury yields, mortgage rates and borrowing costs for companies may depend less on Wednesday’s move than on that signal.

The September decision is therefore not just about 25 basis points. It is a test of whether the Fed can contain inflation without deepening pressure on an economy already facing higher energy costs and slowing growth.