Kansas City Fed Manufacturing Survey: Inventories of raw materials: Future (increase vs decrease; diffusion index; percentage points; seasonally adjusted) - 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 adjusted diffusion index for inventories of raw materials was 2.0 (share of CEOs seeing a future increase minus share forecasting a decrease) in December 2025, versus -5.0 in November.
Sample. This monthly time series has 294 observations overall. The series covers the time span going from July 2001 to December 2025.
History. Here’s a quick look at a few simple statistics we computed on the entire sample: the diffusion index had a mean value of -1.1; it peaked at 28.0 in June 2018; it reached its minimum of -41.0 in February 2009.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-10-31 | -2.0 |
| 2025-11-30 | -5.0 |
| 2025-12-31 | 2.0 |
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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 | Yes |
| 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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