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 12.0 (share of CEOs seeing a recent increase minus share reporting a decrease) in October 2026, compared to 9.0 in September 2026.
Sample. This monthly time series has 304 data points. The span of time covered by the series is from July 2001 to October 2026.
History. Here's a peek at a few summary statistics computed on the full sample: the diffusion index reached its minimum of -30.0 in May 2003; it achieved a maximum of 31.0 in October 2017; it had a mean of 1.6.
Latest values
| Date | Value - Percentage points |
|---|---|
| 2026-08-31 | 11.0000 |
| 2026-09-30 | 9.00000 |
| 2026-10-31 | 12.0000 |
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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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