US state expansion breadth, diffusion indexes

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Monthly national breadth of US state economic expansion: the Philadelphia Fed's 1-month and 3-month NET diffusion indexes (percent of the 50 states whose coincident index rose minus percent whose fell; -100 = every state declining, +100 = every state rising), with broad-expansion/expansion/even-split/contraction/broad-contraction breadth bands. A companion to the state-level coincident-activity panel; join on month for a national cycle overlay. Keyless official .xls download. Who joins this: a sales team or subscription business joins (month) to weight state-level signals by how broad the national expansion is.

Source
Rows: 565
Columns: 5
Source cadence: Monthly
Last refreshed: Sep 30, 2026
Theme: economics

Column	Type	Description
month	string	ISO date of the month's first day. (unit: date)
di_1m	float	1-month net diffusion index: percent of states with a rising coincident index minus percent with a falling index, -100 to +100. (unit: net percent)
di_3m	float	3-month net diffusion index: percent of states with a rising coincident index over 3 months minus percent with a falling index, -100 to +100. (unit: net percent)
breadth_band_3m	string	broad-expansion (>=60) / expansion (>0) / even-split (=0) / contraction (<0) / broad-contraction (<=-60) from di_3m.
row_hash	string	Deterministic sha256 row identity (first 16 hex chars).

First 10 sample rows — a preview, not the complete dataset.

month	di_1m	di_3m	breadth_band_3m	row_hash
1979-08-01	58	—	unavailable	a9443d27e3551d0a
1979-09-01	60	—	unavailable	d3f627b633e3177b
1979-10-01	52	70	broad-expansion	5f833e91bfc9fe45
1979-11-01	56	76	broad-expansion	ff2a0ece4e422b2e
1979-12-01	44	58	expansion	6640d418758b5a31
1980-01-01	-2	48	expansion	8165185a8be60bc8
1980-02-01	-12	12	expansion	e33a8db48aee48da
1980-03-01	-74	-26	contraction	9efef5b06598ce62
1980-04-01	-78	-66	broad-contraction	12428c8ff32eb446
1980-05-01	-78	-78	broad-contraction	5f0097fb9595b5b4

Profiled Oct 1, 2026 from snapshot 20260930T195509Z-133858e5a8b8

Measured

Completeness: 99.9%
Rows: 565
Columns: 5
Columns with gaps: 1

Rows per yearmonth · 1979–2026 · 48 years

19792026

Column	Missing	Distinct	Range	Distribution
monthvarchar	0%	569	—	1979-08-011 1979-09-011 1979-10-011
di_1mdouble	0%	91	-100 → 100median 86	5 outside 1st–99th percentile
di_3mdouble	0.35%	84	-100 → 100median 92	6 outside 1st–99th percentile
breadth_band_3mvarchar	0%	5	—	broad-expansion464 expansion45 contraction30
row_hashvarchar	0%	524	—	00002e9cf3cab1d31 0009b18e53ce3b071 00149b84f85117d91

Point any LLM at the metadata endpoint — the documentation above is machine-readable too (JSON-LD + Croissant).

cURL

curl "https://datazimuts.com/v1/datasets/philly_state_coincident_intel/us_coincident_diffusion_monthly" | jq '{title, rows, columns_count, license}'

Python

import requests

ds = requests.get("https://datazimuts.com/v1/datasets/philly_state_coincident_intel/us_coincident_diffusion_monthly").json()
print(ds["title"], ds["rows"], "rows")

# Sample rows for an LLM context window
for row in ds.get("sample_rows", [])[:5]:
    print(row)

API endpoint: https://datazimuts.com/v1/datasets/philly_state_coincident_intel/us_coincident_diffusion_monthly

Tip: fetch /llms.txt for the full machine-readable catalog.

Cite this snapshot

Pinned to snapshot 20260930T195509Z-133858e5a8b8 and its content hash, so readers get exactly the data you used.

APA

. (2026). US state expansion breadth, diffusion indexes [Data set, snapshot 20260930T195509Z-133858e5a8b8, sha256 133858e5a8b8]. Datazimuts. Retrieved 2026-10-01, from https://datazimuts.com/en/datasets/philly_state_coincident_intel/us_coincident_diffusion_monthly?snapshot=20260930T195509Z-133858e5a8b8

BibTeX

@misc{dz_philly_state_coincident_intel_us_coincid_133858e5,
  title        = {{US state expansion breadth, diffusion indexes}},
  author       = {{}},
  year         = {2026},
  publisher    = {Datazimuts},
  howpublished = {\url{https://datazimuts.com/en/datasets/philly_state_coincident_intel/us_coincident_diffusion_monthly?snapshot=20260930T195509Z-133858e5a8b8}},
  note         = {Snapshot 20260930T195509Z-133858e5a8b8, sha256 133858e5a8b886448bbb92c505dd79258ddeafdc2b283c970f24ca4a10f8c23a; accessed 2026-10-01}
}

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US state expansion breadth, diffusion indexes

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