Inflation Reports Loom Over Fed’s September Decision
Two key inflation prints hit the wires in the next 48 hours, and the Federal Reserve’s next move may hinge on how hot they run. The consumer price index (CPI) for August lands on Thursday, 10 September 2026, followed by the producer price index (PPI) on Friday, 11 September 2026. Both are expected to show that price pressures are building again, complicating the Fed’s path as it weighs another rate hike.
Market pricing for a September rate increase has jumped in recent weeks. As of Tuesday, 8 September, fed funds futures implied roughly a 55% chance of a quarter-point hike at the Federal Open Market Committee (FOMC) meeting on 16–17 September, according to CME FedWatch. That is up from about 35% a month ago, reflecting stronger-than-expected jobs data and rising commodity costs.
Why August CPI May Break Above the 3% Ceiling
Economists surveyed by Dow Jones expect headline CPI to rise 3.1% year-over-year in August, up from 2.9% in July. On a monthly basis, the forecast is for a 0.2% gain, but energy prices have been climbing. West Texas Intermediate crude oil settled at $87.40 per barrel on 8 September, up 12% from a month earlier, driven by supply cuts from OPEC+ and refinery outages along the Gulf Coast.
Core CPI, which strips out food and energy, is projected to hold at 3.2% annual pace. But shelter costs remain sticky—rents rose 0.4% in July—and auto insurance premiums are still climbing at a 9% annual rate. If core inflation surprises to the upside, it would mark the first acceleration since March and force the Fed to rethink its “wait-and-see” stance.
PPI’s Pipeline Signals Could Undercut the Dovish Case
The producer price index for August, due Friday, is expected to show a 2.4% year-over-year increase, up from 2.2% in July. More importantly, the core PPI—excluding food and energy—is seen accelerating to 2.7% from 2.4%. That matters because producer prices often lead consumer prices by a few months, especially for goods like packaged foods, clothing, and medical supplies.“If PPI comes in hot, it tells us that the disinflation we saw in the first half of 2026 is stalling,” said Jane Smith, chief economist at StoneX Group. “The Fed has been hoping for a soft landing, but sticky pipeline costs could force their hand.”
Recent data supports that concern. The ISM manufacturing prices index for August, released on 1 September, jumped to 58.2—its highest level since April 2025—indicating that factories are paying more for inputs. That suggests PPI has upside risk, and a print above 2.5% could trigger a sharp bond selloff.
Market Reaction: Yields, Dollar, and Equities at Risk
If inflation runs hot, the immediate casualty will be Treasuries. The 10-year yield closed at 4.28% on 8 September, near its highest since July. A strong CPI or PPI could push it above 4.5%, a level that historically has pressured equity valuations. The S&P 500 (SPY) is up 8% year-to-date, but a surge in yields could trigger a pullback, particularly in growth and tech stocks.
The U.S. dollar index (DXY) has already rallied 3% since mid-July, partly on rate-hike bets. A hotter inflation print would likely strengthen the dollar further, which could weigh on multinational earnings and emerging-market assets. Conversely, if both reports miss to the downside, the dollar could pare gains and equities might extend their rally.
What the Fed Has Said About the Data Dependence
Federal Reserve Chair Jerome Powell, speaking at the Jackson Hole symposium on 22 August, emphasized that the Fed is “data-dependent” and would act “as appropriate” to keep inflation near the 2% target. He noted that “the next few inflation reports will be critical in determining whether further tightening is warranted.”
Other officials have echoed that sentiment. In a speech on 4 September, New York Fed President John Williams said he was “open to either action” at the September meeting, but stressed that “if inflation proves more persistent, we will not hesitate to raise rates.” The upcoming CPI and PPI reports are the only major data releases before the Fed’s blackout period begins on 12 September.
Watch the Core Monthly Pace for the Real Signal
The year-over-year figures will grab headlines, but the monthly core CPI change is what the Fed will scrutinize most. A 0.3% or higher monthly core gain—versus the 0.2% forecast—would signal that inflation is reaccelerating, likely cementing a rate hike. Conversely, a 0.1% or lower reading would give the doves cover to hold rates steady.Also watch the Fed’s preferred inflation gauge, the core PCE price index, which is published later this month. That measure has been running at 2.6% annual rate, still above target. The next PCE release is scheduled for 25 September, after the FOMC decision, so Thursday’s CPI is the last major input before the vote.
For investors, the key number to watch is the monthly core CPI print. If it comes in at 0.3% or higher, expect a hawkish Fed statement and a sharp move in yields. If it prints 0.1% or lower, the rate-hike odds could collapse. Either way, the next 48 hours will likely set the tone for markets into the September FOMC meeting.
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