Kansas City Fed Manufacturing Survey: Inventories of raw materials: Current (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 stood at 5.0 (share of CEOs seeing a recent increase minus share reporting a decrease) in February 2026, compared to -5.0 in the previous month.
Sample. There are 296 records overall in the monthly time series presented in the chart above. The series covers the time range stretching from July 2001 to February 2026.
History. Here are a few descriptive statistics we computed on the entire sample: the diffusion index had an average value of 1.4; it reached a maximum of 34.0 in March 2022; it recorded a bottom of -30.0 in December 2001.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-12-31 | -1.0 |
| 2026-01-31 | -5.0 |
| 2026-02-28 | 5.0 |
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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 | 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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