# US consumer prices rose 0.6% in September as producer costs jumped 5.9%

*Economics. 46% certain. Friday, 16 October 2026*

> Speculative fiction assembled from prediction-market prices. This has not happened.

**Core CPI increased by more than 0.1% month-over-month, while overall CPI climbed 0.6%.**

September's price data showed modest but persistent inflation. Overall consumer prices rose 0.6% from the prior month, while the Core index, which strips food and energy, increased by more than 0.1% month-over-month. At the same time, producer prices were 5.9% higher than a year earlier.

The headline CPI gain of 0.6% was released on Thursday 15 October. The figure measures the change in the basket of goods and services between August and September. It signaled a continuation of price growth at the consumer level.

Core CPI's rise of more than 0.1% was published on Wednesday 14 October. By excluding volatile food and energy items, the Core measure isolates underlying inflation pressures. The modest increase indicated that Core price pressures persisted.

The producer price index showed a 5.9% year-over-year increase, as reported on Friday 16 October. This metric tracks changes in wholesale prices faced by manufacturers. The sizable annual gain pointed to continued cost pressures upstream.

## Analysis

Policymakers will likely weigh this stability against other economic indicators when deciding on interest-rate adjustments.

The Core CPI increase of just over 0.1% indicates that underlying price pressures are still present even after excluding food and energy volatility. Persistent Core inflation can justify a cautious stance on monetary tightening, as it reflects broader price dynamics that are less likely to reverse quickly.

A 5.9% year-over-year jump in producer prices signals strong upstream cost pressures that could eventually filter through to consumer goods. However, the timing and magnitude of that pass-through are uncertain, leaving room for varied impacts on future consumer inflation readings.

### Background consulted for the analysis

- [United States Producer Price Inflation MoM](https://tradingeconomics.com/united-states/producer-price-inflation-mom)
- [Food Price Outlook - Summary Findings | Economic Research Service](https://www.ers.usda.gov/data-products/food-price-outlook/summary-findings)
- [PPI Release Dates 2026: Next Report Time & Latest Data | FedRateCalc](https://fedratecalc.com/ppi-release-date/)
- [US CPI September 2026: Forecast, Core CPI and Fed Odds](https://admiralmarkets.com/analytics/traders-blog/us-cpi-preview-september-2026-forecasts-and-the-core-cpi-outlook)

## What this was built from

- **September Inflation US - Monthly**: 0.6%, 46%; settles Thursday, 15 October 2026 (polymarket). [Market](https://polymarket.com/event/september-inflation-us-monthly)
- **Core CPI MoM - September 2026**: 0.2%, 48%; settles Thursday, 15 October 2026 (polymarket). [Market](https://polymarket.com/event/core-cpi-mom-september-2026)
- **US headline inflation rate in September (month-over-month CPI)**: Above 0.4%, 56%; settles Wednesday, 14 October 2026 (futuur). [Market](https://futuur.com/q/247563/us-headline-inflation-rate-in-september-month-over-month-cpi)
- **PPI YoY - September 2026**: 5.9%+, 93%; settles Friday, 16 October 2026 (polymarket). [Market](https://polymarket.com/event/ppi-yoy-september-2026)
- **Core CPI YoY - September 2026**: 2.4%, 54%; settles Thursday, 15 October 2026 (polymarket). [Market](https://polymarket.com/event/core-cpi-yoy-september-2026)
- **US Core CPI inflation (month-over-month): September**: Above 0.1%, 64%; settles Wednesday, 14 October 2026 (futuur). [Market](https://futuur.com/q/247562/us-core-cpi-inflation-month-over-month-september)