What it is — PMI in Forex
The Purchasing Managers’ Index (PMI) is a monthly survey of companies — purchasing managers ask about new orders, hiring, output, delivery times and prices paid. The answers are rolled into one diffusion index: above 50 means expansion, below 50 means contraction, and the distance from 50 shows the pace.
Two flavours exist: flash estimates (published about a week before month-end — the first hard read on the month) and final figures. The big publishers are S&P Global and, in the US, ISM’s manufacturing and services reports, which use a slightly different survey base.
Why it matters — PMI in Forex
- It is early: PMIs land before GDP, jobs for the same month, and most hard data — markets use them to re-position first.
- The prices-paid component feeds the inflation story that central banks (and CPI prints) later confirm.
- 50 is the line markets argue about: crossing it, in either direction, changes the growth narrative for a currency.
Reading a PMI print properly
PMIs are monthly surveys of purchasing managers — the people buying inputs at hundreds of firms — compressed into one number around a 50 boom-bust line: above 50, activity is expanding; below, contracting. Suppose manufacturing PMI prints 48.5 against 49.2 last month: contraction, and getting worse — mildly negative for that currency. But a 48.5 after 46.0 reads improving even though it is still below 50, and markets often reward the direction. That double read — level and change — is the whole skill. The flash (preliminary) versions, released before the month even closes, move markets most because they are the earliest hard data available.
Why PMIs matter more than their quirkiness suggests
The survey’s quirks are real: it measures breadth and sentiment, not output; the diffusion math means 50 is a balance point, not a target; and revisions exist. It earns its red-calendar status through timing — PMIs land when almost nothing else current does, and they correlate with GDP with a lead. For a trader the usable habit is comparative: a currency whose PMIs beat while a rival’s miss is a relative-strength story that tends to persist for days, not minutes. On release minute itself, the usual red-event rules apply — the calendar marks them, and slippage does not negotiate.
Frequently asked questions — PMI in Forex
What does a PMI above 50 mean?
That surveyed firms reported, on balance, improvement versus the previous month — expansion. Below 50 signals contraction. The level relative to 50 and the surprise versus forecast both matter.
What does a PMI of 50 mean?
It is the balance point: firms reporting expansion exactly offset firms reporting contraction — no growth, no shrinkage. Above 50 expands, below contracts, and the distance from 50 signals how strongly.
Which PMI moves markets more, manufacturing or services?
In modern developed economies, services — it is the bigger share of output and employment. A services beat tends to outweigh a manufacturing miss unless the economy is clearly goods-driven.
What is the difference between flash and final PMI?
Flash estimates cover roughly 85–90% of survey responses and arrive about a week before month-end; finals complete the sample two weeks later. Markets move most on the flash because it is the first read.
Related terms — PMI in Forex
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