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 stood at 6.0 (share of CEOs seeing a recent increase minus share reporting a decrease) in February 2026, compared to -4.0 in January 2026.
Sample. This monthly time series has a total of 296 data points. The time period covered by the series stretches from July 2001 to February 2026.
History. Check out a few descriptive statistics we calculated on the whole sample: the diffusion index averaged 1.5; it recorded its highest level of 31.0 in October 2017; it reached a trough of -30.0 in May 2003.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2025-12-31 | 1.0 |
| 2026-01-31 | -4.0 |
| 2026-02-28 | 6.0 |
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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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