Wall Street Focuses on August U.S. CPI...Will 0.2% or 0.3% Determine the Rate Decision?
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- 2026-09-07 10:07:30
- Updated
- 2026-09-07 10:07:30
The Fed’s policy calculus is becoming more complicated. Overall inflation is expected to rise again because of higher international oil prices stemming from the war in Iran, while core CPI, which reflects underlying inflation trends, is forecast to slow.
Headline CPI at 0.4% vs. Core CPI at 0.2%...Inflation Trends Diverge
According to market forecasts compiled by Reuters from economists, August CPI is expected to rise 0.4% from the previous month. Core CPI, which excludes food and energy, is projected to increase by just 0.2%. On a year-over-year basis, headline CPI is expected to remain at around 3.4%, while core CPI is forecast to fall to 2.4% from 2.5% in July.
The Financial Times (FT) also highlighted the possibility that headline and core CPI could move in opposite directions in August. Rising international oil prices could push up overall inflation through higher gasoline and other energy prices, while upward pressure on core inflation may remain relatively limited. The FT analyzed that the Federal Reserve System (FRS) may place greater importance on core CPI trends, which reflect underlying inflationary pressure, than on crude oil supply shocks that it is difficult to control directly.
Real-time estimates from the Federal Reserve Bank of Cleveland support this outlook. As of the 4th, the bank’s inflation nowcast projected that August headline CPI would rise 0.36% month over month and 3.38% year over year. Core CPI was forecast to increase 0.20% month over month and 2.38% year over year.
In other words, headline CPI is expected to rise by nearly 0.4%, while core CPI would increase by only 0.2%. This suggests that recent oil-price gains may be lifting inflation without yet spreading into a broad-based rise in core prices.
A 0.2% Reading Would Match Expectations...A 0.4% Reading Would Bolster the Case for a Hike
As a result, the market is focused on how far core CPI deviates from the consensus forecast of 0.2%.
If core CPI remains around 0.2% month over month, the result would be in line with market expectations. That would reinforce the view that the inflation slowdown seen in June and July is continuing, giving the Federal Reserve System (FRS) more room to hold rates steady and await additional data despite stronger-than-expected employment.
A 0.3% reading would make the situation more complicated. Even if year-over-year core inflation falls to around 2.4% to 2.5%, it would indicate that the short-term pace of price increases has accelerated again. Internal Federal Open Market Committee (FOMC) debate over holding rates steady versus raising them could intensify further.
A reading of 0.4% or higher would likely be viewed as an upside surprise well above market expectations. With nonfarm payrolls already rising by 162,000 last month, far exceeding forecasts, confirmation of a renewed acceleration in core inflation could strengthen the case for another rate hike. Following the strong employment report, the market-implied probability of a September rate hike rose to around 60%.
Garrett Melson, a portfolio strategist at Natixis Investment Managers Solutions, told Reuters that the key issue in this CPI report is determining whether the decline in inflation seen in June and July is actually continuing.
Ultimately, the key point to watch in the CPI report on the 11th is not how much headline CPI rises because of higher international oil prices, but whether core CPI remains at the market-expected 0.2%. Strong employment has already been confirmed. If inflation also comes in stronger than expected, the Federal Reserve System’s (FRS) options will likely narrow further ahead of the September 15–16 FOMC meeting.
[email protected] Reporter Lee Byung-chul Reporter