What-Is-PMI
Published by CalendaFX — Trade the Economic Calendar
Some economic releases look back at what already happened. PMI is different — it gives an early hint of where the economy is heading next. That is what makes it so useful to traders. Here is a simple explanation.
What PMI means
PMI stands for Purchasing Managers’ Index. Each month, researchers survey managers at many businesses and ask a straightforward question: is activity growing or shrinking compared with last month? Their answers are combined into a single number that captures the mood of businesses across the economy.
The magic number: 50
PMI is built around one simple dividing line — the number 50:
- Above 50 means business activity is expanding.
- Below 50 means it is contracting.
- Right at 50 means no change.
So the moment traders see a PMI figure, they instantly know whether businesses are growing or struggling — and how the trend is shifting from month to month.
Why traders love a leading indicator
PMI is what is known as a “leading” indicator. Because it is based on what business managers are seeing right now, it hints at where the economy is heading before the official data confirms it. This early signal is valuable, which is why a surprising PMI number can move a currency quickly.
Manufacturing and services
You will usually see two main PMIs: one for manufacturing (factories and goods) and one for services (shops, banks, hospitality, and the like). In most modern economies, services make up the larger share, so the services PMI often carries more weight. Manufacturing PMI, meanwhile, is closely watched by commodity traders, since factories drive demand for raw materials.
The bottom line
PMI is a monthly survey of business managers that tells you, in a single number, whether the economy is expanding or contracting — with 50 as the dividing line. Because it looks forward rather than back, it can move markets even before the official figures arrive. Keep an eye on both the manufacturing and services versions to read the economy’s direction early.
Related reading
- What Is GDP? A Simple Guide
- The Big Five: The Releases That Move Markets Most
- How to Read an Economic Calendar
This article is for educational purposes only and does not constitute financial advice. Trading carries significant risk, and you should never trade with money you cannot afford to lose. Please read our full Risk Disclaimer.