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 6.0 (share of CEOs seeing a future increase minus share forecasting a decrease) in September 2026, versus 9.0 in August 2026.
Sample. There are 303 records in the monthly series shown in the chart above. The time range covered by the series extends from July 2001 to September 2026.
History. Here's a snapshot of some statistics we calculated on the whole sample: the diffusion index achieved a maximum of 28.0 in June 2018; it registered a minimum of -41.0 in February 2009; it had an average value of -1.0.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-07-31 | 5.00000 |
| 2026-08-31 | 9.00000 |
| 2026-09-30 | 6.00000 |
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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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