Kansas City Fed Manufacturing Survey: Inventories of raw materials: Current (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 3.0 (share of CEOs seeing a recent increase minus share reporting a decrease) in December 2025, compared to -1.0 in November.
Sample. This monthly series has a total of 294 observations. The series covers the time period extending from July 2001 to December 2025.
History. Here’s a quick look at some statistics calculated on the whole sample: the diffusion index had a mean value of 1.5; it recorded a maximum of 31.0 in October 2017; it reached its minimum of -30.0 in May 2003.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-10-31 | 0.0 |
| 2025-11-30 | -1.0 |
| 2025-12-31 | 3.0 |
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Series Metadata
| Field | Value |
|---|---|
| Description | Diffusion index for the question: Did inventories or raw materials increase or decrease in the past month? |
| Country | United States |
| Economic concept | Business survey response |
| Data type | Coincident 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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