US CPI September 2023 Analysis: A Detailed Look at Inflation

Key Takeaways

• Headline CPI increased by 0.3% in September, with a 3.0% increase year-over-year.
• Gasoline prices were a major driver, increasing by 4.1%.
• Core CPI rose by 0.2%, lower than the previous two months.
• Some sectors, like used cars and auto insurance, are experiencing price decreases.

Detailed Analysis of September 2023 CPI

The U.S. Bureau of Labor Statistics released the Consumer Price Index (CPI) report for September 2023 today. The report indicates that the CPI for All Urban Consumers (CPI-U) increased 0.3 percent in September on a seasonally adjusted basis, lower than August's 0.4% increase. On an unadjusted basis, the all items CPI increased 3.0 percent for the 12 months ending September. It's crucial to note that the September CPI data collection was completed prior to the potential government funding lapse.

Drivers of Inflation

The gasoline index was a major contributor to the all items monthly increase, rising 4.1 percent in September, and the energy index rose 1.5 percent. The food index increased 0.2 percent in September, with the food at home index rising 0.3 percent and the food away from home index increasing 0.1 percent.

Core CPI

The index for all items less food and energy, also known as core CPI, rose 0.2 percent in September, less than the 0.3 percent increase in each of the prior two months. Indexes that increased during the month included shelter, airline fares, recreation, household furnishings and operations, and apparel. Indexes that decreased included motor vehicle insurance, used cars and trucks, and communication.

12-Month Outlook

Over the last 12 months ending in September, the all items CPI increased 3.0 percent, higher than the 2.9 percent increase at the end of August. The core CPI increased 3.0 percent year-over-year. The energy index increased 2.8 percent year-over-year, and the food index increased 3.1 percent.

Food Analysis

Food prices increased 0.2 percent in September, lower than the 0.5 percent increase in August. The food at home index rose 0.3 percent, with four of the six major grocery store food group indexes increasing. The index for other food at home rose 0.5 percent, and the indexes for cereals and bakery products and nonalcoholic beverages both rose 0.7 percent, and meats, poultry, fish, and eggs rose 0.3 percent. The index for dairy and related products decreased 0.5 percent, with the index for cheese and related products falling 0.7 percent. The index for fruits and vegetables was unchanged. The index for food away from home rose 0.1 percent, with limited service meals rising 0.2 percent and full service meals remaining unchanged.

Energy Analysis

The energy index rose 1.5 percent in September, higher than the 0.7 percent increase in August. The gasoline index rose 4.1 percent (unadjusted gasoline prices rose 1.1 percent), the electricity index decreased 0.5 percent, and natural gas fell 1.2 percent. Over the last 12 months, the energy index rose 2.8 percent, with electricity rising 5.1 percent, natural gas rising 11.7 percent, and gasoline falling 0.5 percent.

Conclusion

The September 2023 CPI report suggests that inflation remains a concern, although there are some signs of slowing core inflation. The Federal Reserve is likely to closely monitor this data for future monetary policy decisions.