Traders scrambled to adjust their expectations on Thursday after the latest inflation data suggested the Federal Reserve is highly likely to raise interest rates next week.

The probability of a Fed rate hike in September jumped to approximately 70% following the release of the Producer Price Index (PPI) report, with futures markets now fully pricing in at least one rate increase by the end of October.

According to the latest figures from the U.S. Bureau of Labor Statistics, rising energy costs from the previous month continued to fuel inflationary pressures, adding urgency to the Fed's decision-making process heading into its upcoming policy meeting.

Core PPI, which strips out volatile food and energy categories, increased by 0.2% month-over-month in August — a slight cooling from July's downwardly revised 0.3% gain and below the 0.3% that economists had anticipated. However, the annual pace of core producer prices held steady at 4.6%.

While these underlying metrics showed mild moderation, the broad picture painted a more challenging outlook. Since the onset of the Iran conflict, the headline producer price index has remained elevated for several consecutive months. The August PPI rose 0.4% from the previous month, matching consensus estimates, while the year-over-year increase accelerated to 5.4%, surpassing the 5.3% forecast.

The release triggered an immediate market reaction, with spot gold dropping sharply and briefly tumbling below $4,330 per ounce. Meanwhile, the U.S. dollar index climbed back above the 99 mark as traders digested the mixed data landscape.

Fed funds futures, tracked through the CME, now show a roughly 70% probability of a rate hike at the September meeting, alongside full pricing of a move before the end of October.

Delving into the report's components, airline ticket prices surged 0.7% month-over-month in August, while healthcare costs presented a mixed performance across its various categories. These particular indices hold significant weight for Fed officials, as they factor directly into the calculation of their preferred inflation gauge — the core Personal Consumption Expenditures (PCE) index.

To gain a more accurate read on overall inflation trends, the Bureau of Economic Analysis is scheduled to release August PCE data along with accompanying income and spending reports on September 30th. This upcoming report will incorporate methodological adjustments to how prices are measured for certain categories, including legal services, computer software, and investment advice.

Many economists project that these methodological revisions will exert downward pressure on the PCE readings. Yet before that data becomes available, the market remains on edge ahead of the crucial Consumer Price Index (CPI) report scheduled for Friday. Analysts widely anticipate that while surging gasoline prices will inevitably lift the headline number, the core CPI should remain relatively tame in comparison.

These two consecutive blockbuster reports are set to directly influence the trajectory of monetary policy. Several Fed officials have made clear that the final decision at the September 15-16 policy meeting will heavily hinge on the inflation trends revealed by this week's price data.

Fed Chair Warsh had issued a stern warning during a public address last month, emphasizing that if policymakers lack conviction that underlying inflationary pressures are meaningfully improving, the central bank still has "work to do" in its ongoing fight against rising prices.

The persisting hostilities between the U.S. and Iran continue to ignite fresh gains in international crude oil prices. This geopolitical-driven energy shock stands to add another layer of complexity to the Fed's already arduous battle against inflation, leaving the central bank's path forward increasingly uncertain as it navigates both market expectations and economic realities.