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Most economic data tells you what already happened. GDP describes a quarter that ended months ago. CPI measures prices paid weeks ago. PMI is different. It asks the people who buy raw materials and sign supplier contracts whether business got better or worse this month, and publishes the answer on the first business day of the next one. |
1 | What PMI Actually Measures |
PMI stands for Purchasing Managers' Index. It is a monthly survey of the executives who handle procurement, the people responsible for ordering materials, managing inventory, and hiring for their departments. The questions are deliberately simple. Compared with last month, are new orders better or worse? Is production up or down? Are you hiring or cutting? Are suppliers delivering faster or slower? Are you paying more for inputs? Above 50 means expansion, below 50 contraction, and 50 exactly means nothing changed. It is worth pausing on how unusual that is. Most economic data comes from measuring things. PMI comes from asking people, specifically the professionals whose job requires them to notice changes in demand before anyone else does. They see the order book before it becomes revenue, and the supplier quote before it becomes a price increase. |
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2 | The Part Most People Get Wrong |
PMI is a diffusion index. It measures breadth, not size. A reading of 55 does not mean the economy grew 55 of something. It means more firms reported improvement than deterioration. A reading of 60 does not mean growth is twice as fast as at 30. It means the improvement is more widespread. That distinction matters. A PMI at 51 with every industry inching up is a healthier signal than 55 where three sectors are booming and the rest are flat. It is why analysts check how many industries are expanding alongside the headline. In July, 15 of 18 manufacturing industries reported growth, which tells you the strength was broad rather than concentrated. |
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One more wrinkle. The 50 line separates expansion from contraction in the surveyed sector, but for the overall economy the threshold sits around 47.5, because manufacturing can shrink slightly while the broader economy still grows. A manufacturing PMI of 48 is not a recession signal by itself. |
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3 | The Sub-Indexes Are Where the Signal Lives |
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New Orders. The most forward-looking component. Orders today become production next month and revenue the month after. When orders roll over while the headline still looks fine, take it seriously.
Employment. A preview of the jobs report. Not a precise predictor, but a purchasing manager saying they are hiring is a real signal about labour demand, and it arrives before official payrolls.
Prices Paid. A preview of inflation. Input cost pressure at the factory gate, before it reaches consumer prices. One of the earliest inflation reads available anywhere.
Supplier Deliveries. The one that trips people up, because a higher reading means slower deliveries. Normally that signals strong demand. During a supply crisis it signals disruption. Same number, opposite meaning.
Backlog of Orders. Rising backlogs mean firms are behind and must keep producing. Falling backlogs mean they are working through their cushion.
Customer Inventories. Works in reverse. "Too low" is bullish for future production, because those stockpiles need rebuilding.
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4 | July's Report Is a Perfect Example |
The headline was strong. Manufacturing PMI came in at 55.6, up 2.3 points, the highest since May 2022 and a seventh consecutive month of expansion. Production jumped 6.3 points to 58.5, its best since November 2021. New orders edged up to 56.7. Backlogs jumped to 55.0. Customer inventories fell to 40.7, deep in "too low" territory, implying more production is coming. The employment component was the genuine surprise at 52.8, putting manufacturing employment in expansion for the first time in 33 months. Nearly three years of contraction ending. So far, uniformly good. Then you reach Prices Paid, which stayed above 70. A reading that high signals broad-based input cost increases, and it has been running hot for months. And services, the far larger share of the economy, told a softer story: expanding around 54, but with employment below 50 and its own prices index above 70. Read together: manufacturing accelerating, services cooling, factory hiring improving while services hiring softens, and input costs elevated across both. Not a simple picture, but far more useful than "PMI beat expectations." |
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The Data That Matters, Every SundayFedAndMarkets reads the reports so you can start the week knowing what actually shifted, across seven markets. |
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5 | Why This Is Driving the Fed Debate |
Three regional Fed presidents dissented in favour of a rate hike at the July meeting. Look at manufacturing at 55.6, employment returning to expansion, and prices above 70, and their case writes itself. That is an economy with momentum and persistent cost pressure, the classic setup for tightening. The other side looks at services employment contracting, a labour market cooling outside factories, and inflation decelerating for two consecutive months, and sees an economy that does not need another hike. Both camps are reading real data. They are weighting different parts of it. That is the practical value of understanding PMI properly: central bank disagreement stops being confusing noise and starts looking like a legible argument. |
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ISM The older survey, panel weighted toward larger firms. Publishes first business day for manufacturing, third for services. Moves US markets more. |
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S&P Global Different panel, broader company sizes, methodology consistent across countries. Publishes a flash estimate mid-month. Better for international comparison. |
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They can and do diverge, sometimes meaningfully, because the panels and weightings differ. When they disagree, it usually reflects a gap between large firms and small ones, and that gap is itself information. |
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7 | What Traders Should Watch |
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Read components before the headline. The headline is one number and the report contains ten. New orders, employment, and prices paid tell you more about what comes next.
Watch direction, not just level. A PMI falling from 58 to 55 is a deceleration even though 55 is strong. Momentum often matters more than the absolute value.
Use Prices Paid as an inflation early warning. It leads CPI. Persistent climbs there usually show up in consumer inflation a few months later.
Compare manufacturing to services. Services is roughly 70% of the US economy. Strong manufacturing alongside weak services is not broad strength. Right now that gap is the whole story.
Note the timing advantage. PMI arrives before payrolls, before CPI, before anything else. It is the first data point that shapes the month's narrative.
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Key TakeawaysPMI is a survey, not a measurement, and it is a diffusion index. It tells you how many firms are doing better, not how much better things are. The sub-indexes preview other data. New orders lead revenue, employment leads payrolls, prices paid leads CPI. That is where the real value sits. July showed manufacturing at its strongest in over three years and factory hiring recovering, alongside cooling services and elevated input costs. That combination is exactly why the Fed is split. |
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Learn to read the components, and PMI stops being a number that briefly moves the market on the first Monday of the month. It becomes the earliest honest answer to the question every other release will spend the rest of the month confirming or contradicting. — Fed'n Markets |
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