Understanding the Non-Manufacturing Index and Its Impact on the US Economy

2 min read | June 02, 2025 03:21 PM EDT | By Team Kalkine Media

Highlights

  • The Non-Manufacturing Index tracks monthly business activity in the US service sector.
  • It is seasonally adjusted and published by the Institute for Supply Management.
  • A reading above 50% signals expansion, while below 50% indicates contraction in services.

The Non-Manufacturing Index (NMI) is a crucial economic indicator that provides insight into the health and performance of the United States service sector. Released monthly by the Institute for Supply Management (ISM) as part of their Non-Manufacturing ISM Report on Business, this index is highly regarded by economists, investors, and policymakers alike. It offers a snapshot of business activity specifically within the non-manufacturing or service industries, which collectively represent roughly 80% of the US economy.

The NMI is seasonally adjusted to account for predictable fluctuations throughout the year, ensuring that the data reflects genuine trends rather than seasonal variations. By measuring factors such as new orders, employment, supplier deliveries, and business activity, the index captures the overall momentum and direction of the service sector.

One of the most important aspects of the Non-Manufacturing Index is its benchmark value of 50%. When the index reads above 50%, it indicates that the service economy is expanding, suggesting growing business activity, increased demand, and overall economic strength in the sector. Conversely, a reading below 50% signals contraction, pointing to shrinking business activity and potential economic challenges within services.

Given that the service sector dominates the US economy, the NMI serves as a vital gauge for assessing economic health and forecasting future trends. It complements other economic indicators and provides a broader perspective on how non-manufacturing industries such as finance, healthcare, retail, and hospitality are performing. This information is invaluable for decision-makers looking to navigate market conditions and make informed strategic choices.

Conclusion
The Non-Manufacturing Index is a key monthly indicator that reflects the state of the US service economy, with readings above or below 50% signifying expansion or contraction. Its role in tracking a sector that constitutes the majority of the economy makes it an indispensable tool for understanding broader economic dynamics.


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