Kansas City Fed Manufacturing Survey: Inventories of raw materials: Future (increase vs decrease; diffusion index; percentage points; seasonally unadjusted) - United States - Kansas City Fed - Monthly
This series is part of the dataset: Kansas City Fed Manufacturing Survey
Download Full Dataset (.xlsx)Latest updates. According to recent survey data about manufacturing firms in the Tenth Federal Reserve District, the seasonally unadjusted diffusion index for inventories of raw materials was 5.0 (share of CEOs seeing a future increase minus share forecasting a decrease) in December 2025, compared to -2.0 in the previous month.
Sample. In this monthly time series, there are 294 observations overall. The time range covered by the series stretches from July 2001 to December 2025.
History. Here's a snapshot of some summary statistics calculated on the entire sample: the diffusion index had an average value of -1.1; it reached its maximum of 24.0 in June 2018; it recorded a bottom of -38.0 in February 2009.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-10-31 | 2.0 |
| 2025-11-30 | -2.0 |
| 2025-12-31 | 5.0 |
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Series Metadata
| Field | Value |
|---|---|
| Description | Diffusion index for the question: Will inventories or raw materials increase or decrease over the next six months? |
| Country | United States |
| Economic concept | Business survey response |
| Data type | Leading indicator of the business cycle |
| Seasonally adjusted | No |
| Deflation method | Not applicable |
| Rescaling | None |
| Measure type | Diffusion index (share of respondents reporting an increase minus share reporting a decrease) |
| Frequency | Monthly |
| Unit | Percentage points |
| Source | Federal Reserve Bank of Kansas City |
| Source type | Central bank |
| Data licence | Reproduction allowed subject to conditions |
| Other information | FS correspondence: Inventories of raw materials |
| FSR temporal aggregation code | LM01 |
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