On Thursday, October 15th, the U.S. Bureau of Labor Statistics released the September Producer Price Index (PPI). The final demand price index rose 1.3% month-over-month, the largest monthly increase since March 2022, and rose 6.3% year-over-year, the highest level since December 2022. The core index (excluding food and energy) rose 0.7% month-over-month and 5% year-over-year. Retail sales rose 0.8% month-over-month, and the New York Fed Manufacturing Index rose to 25.5.

Energy costs have driven a significant acceleration in producer prices.

Final demand prices for goods rose 2.6% month-over-month in September, the largest increase since the series was established in December 2009. Energy prices surged 10.8% month-over-month, contributing over 80% of the overall price increase. Gasoline prices rose 20.3% month-over-month, with diesel, jet fuel, and residential electricity prices all increasing. Food prices rose 1.2% month-over-month. Carl Weinberg, chief economist at High Frequency Economics, pointed out that the jump in transportation prices affects every commodity in the economy because manufacturing inputs need to be transported to factories, and goods at each stage need to flow from producers to wholesalers and then to retailers via trucks, trains, or rail. This is precisely the path through which rising energy prices "penetrate" into core commodity prices. Transportation and warehousing prices rose 3.4% month-over-month, the largest increase since April. The concentrated rise in commodity prices indicates that the energy cost shock has spread outwards through the supply chain, rather than remaining solely within energy itself.

Core inflation resilience and cost transmission mechanism

The producer price index (PPI) excluding food and energy rose 0.7% month-on-month, remaining at 5% year-on-year. Further excluding trade services, the index rose 0.5% month-on-month. The profit margin for wholesale and retail trade services rose 1.4% month-on-month, the largest increase since April, with the market continuing to focus on whether companies absorb the related costs or pass them on to downstream customers. Airfares rose 5% month-on-month, a direct input to the personal consumption expenditures (PCE) price index favored by the Federal Reserve. Healthcare-related categories saw relatively moderate increases. Some economists raised their forecasts for the September core PCE deflator after the data release, expecting a month-on-month increase of 0.3% or 0.4%. Prices for electronic components and accessories fell 0.3% month-on-month, while computer and computer equipment prices rose only 0.1%, and the construction cost index remained largely unchanged. These sub-indices indicate that construction cost pressures related to data centers have not yet significantly intensified, but rising costs in the transportation sector may still affect subsequent pricing throughout the entire supply chain.

Mutual corroboration with consumer prices and retail data

The Consumer Price Index (CPI) for September, released the previous day, rose 0.6% month-over-month and 3.7% year-over-year. Gasoline prices rose 9.1% month-over-month, contributing more than half of the monthly increase. The core CPI rose 0.3% month-over-month and 2.6% year-over-year. Retail sales rose 0.8% month-over-month to $745 billion, faster than market expectations, but gasoline station sales contributed the majority of the increase; sales growth excluding automobiles and gasoline slowed significantly. The New York Fed's Empire State Manufacturing Index for October surged to 25.5 from 7.6 in September, the highest level in nearly five years, with new orders and shipments indices rebounding significantly. The survey also showed that the price expectations index for the next six months rose to its highest level since 2022. The simultaneous strengthening of producer and consumer prices, along with the prominent contribution of energy-related factors to retail sales, points to cost pressures being transmitted from upstream to downstream, but end-user demand in non-energy sectors is relatively mixed.

Policy path and market pricing adjustments

The unexpected rise in producer prices, coupled with previous consumer price data, has led to adjustments in market expectations regarding the Federal Reserve's future interest rate path. Some analysts believe that Fed officials may maintain a trajectory of further rate hikes. Following the data release, US Treasury prices continued to rise, while yields declined somewhat; stock index futures remained under pressure, with technology-related sectors performing relatively weakly. The rise in price expectations in the New York Fed's manufacturing survey further reinforces the assessment that price pressures may persist in the coming months. The September personal consumption expenditure price index and related income and expenditure data will be released on October 29, at which time the market will have a more complete picture of inflation. The current data combination indicates that the energy cost shock and the resilience of core indicators coexist, requiring policymakers to weigh the sustainability of transmission against the performance of other sectors of the economy.

Frequently Asked Questions

Question 1: Why did the US Producer Prices (PPI) see their largest monthly increase in over four years in September? Answer: The main driver was a 10.8% month-on-month increase in energy prices, with gasoline prices rising 20.3%, contributing the vast majority of the commodity price increase. Transportation and warehousing prices rose 3.4% in tandem, further amplifying the cost transmission effect. Question 2: What potential impact will this data have on the subsequent Personal Consumption Expenditures (PCE) price index? Answer: Sub-indices directly contributing to the PCE, such as airfares, performed strongly, leading some economists to raise their forecasts for a 0.3% to 0.4% month-on-month increase in the core PCE deflator for September. The healthcare sub-indices were relatively mild, and overall confirmation still awaits official data on October 29th. Question 3: How do retail sales and manufacturing data correlate with PPI? Answer: The 0.8% month-on-month increase in retail sales was mainly driven by gasoline station sales, with limited growth in non-energy sectors. The New York Fed Manufacturing Index rose to 25.5, indicating a recovery in regional activity, but price payment expectations also rose, suggesting that cost pressures and improved activity coexist.