Wholesale prices in the U.S. surged by 6.3% year over year in September 2026, marking the most significant annual increase since 2022. This jump in the producer price index (PPI), released by the Bureau of Labor Statistics, also showed a 1.3% rise on a monthly basis, both surpassing economists’ expectations. The sharp climb in wholesale costs was primarily driven by higher energy prices, influenced by geopolitical tensions stemming from the U.S. conflict with Iran, which tightened oil supplies and pushed fuel costs up.

Excluding food and energy, the core producer price index rose by 0.7% from August to September and 5.0% annually, indicating that inflation pressures are spreading beyond volatile sectors. The BLS highlighted that almost half of the increase in processed goods for immediate demand was linked to diesel fuel price hikes. This pattern points to a ripple effect where elevated energy expenses are impacting a broader range of goods and services at the wholesale level.

The latest PPI figures followed a similarly strong consumer price index (CPI) report from Wednesday, which revealed inflation was also hotter than anticipated at the consumer level. Retail sales data for September showed a 0.8% gain, outperforming forecasts but with signs of slowing growth when excluding autos and gas stations. This suggests that higher fuel prices may be causing consumers to cut back on spending in other areas.

These inflation reports are fueling speculation about Federal Reserve policy. Market odds of a rate increase at the Fed meeting later this month have risen to about 34%, up from under 18% a week earlier, with nearly 90% of traders expecting at least one hike before the year ends. Analysts believe these persistent inflation readings will likely compel the Fed to maintain a tightening stance as the midterm elections approach, potentially influencing economic and political outcomes in Washington.