ISM Manufacturing Purchasing Managers' Index
The first-workday physical of the economy: above or below the 50 line, it is the monthly lead on GDP and the earliest inflection detector.
Monthly (start of month, mfg + services)
What it is
The ISM Manufacturing PMI, from the Institute for Supply Management, surveys 300+ purchasing managers and composites new orders (30%), production (25%), employment (20%), supplier deliveries (15%) and inventories (10%). The 50 line divides expansion from contraction. The same release carries sub-indices (new orders/prices/employment); the Services PMI follows on the third business day — manufacturing prints first, and together they form the monthly physical.
Release schedule
| Item | Details |
|---|---|
| • | Frequency: monthly |
| • | Release: the first business day of the month at 10:00 ET (22:00/23:00 Beijing time) — among the earliest monthly data |
| • | Contents: the composite plus ten sub-indices (new orders, production, employment, prices paid, supplier deliveries, inventories, etc.) |
| • | Companion: the Services PMI (third business day) — services are about 80% of the US economy and carry more weight |
| • | Comparison caveat: the S&P Global (ex-Markit) PMI prints 1–2 days earlier with a different methodology — not directly comparable to ISM |
Why it matters
PMI is prized for being a leading indicator: purchasing managers feel order changes first (orders precede production; production precedes employment) — the ISM new-orders sub-index leads industrial output by 2–4 months, and the composite leads GDP inflections by about a quarter. Its first-workday slot makes it "the month's first look back" — the market calibrates its expectations for all subsequent data on it.
Impact across assets
Typical impacts (using a big beat):
| Asset | Typical impact |
|---|---|
| US equities | A healthy beat → bullish (cycle confirmed); an "overheating" beat (with high prices-paid) → rate worries turn it bearish |
| US Dollar Index | Beat → strengthens (relative growth); a break below 45 → recession-driven weakness |
| Gold | Both ways: recessionary slides → benefit; overheating rallies → pressure (cuts delayed) — check prices-paid |
| Crypto | Follows risk appetite: beat → bullish tilt; recessionary deterioration → falls with risk |
| Cyclicals vs defensives | Rising PMI favors cyclicals (industrials/materials/energy); falling PMI favors defensives (utilities/healthcare) — a monthly style signal |
How to read it
The standard read:
| Dimension | How to read it |
|---|---|
| The 50 line | > 50 expanding, < 50 contracting; the historical band around 42–43 still corresponds to "overall GDP growing" (manufacturing is small now) |
| Direction & speed (more important) | Month-over-month change beats the level: a fast slide from 55 through 48 is the inflection alarm |
| New orders | The most leading sub-index: < 50 and falling warns of production 2–4 months out; orders-minus-inventories measures demand versus supply |
| Prices paid | The inflation read inside PMI: > 60 = purchasing-side pressure — a forward signal for PPI |
The advanced frame: the manufacturing-versus-services split discriminates stagflation from recession — weak manufacturing with strong services is a normal cycle (manufacturing is more cyclical); both below 50 is full-contraction territory; the services employment and prices components feed the Fed's reaction function directly.
Limitations & common mistakes
- Mixing ISM with S&P Global/Markit: different samples and questionnaires, mediocre historical correlation — "Markit 50.5 with ISM 47" happens; ISM is the market benchmark.
- The "< 50 = recession" oversimplification: manufacturing is about 10–11% of the economy — ISM sat below 50 through 2023 while GDP grew; only below the low-40s maps to recession.
- Ignoring services: about 80% of the US economy is services — reading the economy off manufacturing PMI alone is a 1-in-10 sample.
- The deliveries trap: supplier deliveries are an inverse component — slower deliveries (> 50) is good news in strong demand; normalization (< 50) drags the composite.
- Monthly noise: no revisions but large sample swings — the 3-month average is more reliable than any single print.
Related macro data
How it links to other macro data:
- With the Fed decision: PMI is key pre-FOMC background — manufacturing and services weakening together strengthens the cut narrative. fed-rate
- With unemployment: the PMI employment component cross-checks the rate — manufacturing order contraction leads layoffs by 1–2 quarters. unemployment-rate
- With GDP: PMI is the monthly lead on GDP — the new-orders inflection typically leads GDP by about a quarter. gdp
Symbols most sensitive to ISM Manufacturing PMI
Symbol pages that list this data as a factor to watch:
FAQ
Q What time is the PMI released?
The first business day of the month at 10:00 ET (22:00 Beijing in winter / 23:00 in DST); services on the third business day. It is among the earliest monthly releases — the first look back at the prior month.
Q How do ISM and S&P Global (Markit) PMIs differ?
Both survey purchasing managers, but samples, wording and seasonal adjustment differ — values often carry a 1–4 point systematic gap and occasionally diverge in direction. ISM is the market benchmark; S&P Global prints 1–2 days earlier and serves as a preview.
Q Should I panic when PMI is below 50?
No: manufacturing is about 10–11% of the US economy, and historically ISM above the low-40s still coincides with GDP growth (2023: ISM below 50 all year, GDP positive). The real alarm is a fast slide plus services weakening plus deteriorating employment components.
Q Why is PMI a "leading indicator"?
Purchasing managers order ahead by design (orders lead production by 1–3 months; production leads employment and income) — hence new orders lead industrial output by 2–4 months and the composite leads GDP inflections by about a quarter. It is a survey that turns corporate ordering decisions into a forecast.
Q How much does PMI affect the instrument I trade?
Most relevant for cycle-sensitive names: industrials/materials/energy (the monthly style signal), copper and industrial metals, the dollar (relative growth). Rate-sensitive assets get the indirect "PMI → Fed expectations" transmission. Symbol pages' "macro data to watch" tags flag the relevant factors.
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