Key ISM non-manufacturing figures for August:

• Non-manufacturing PMI: 55.4 versus a 54.2 estimate, up from 54.1 in the prior month
• Business activity: 61.7 versus 59.1 last month
• Employment index: 47.8 versus 47.4 last month
• New orders index: 60.9 versus 57.2 last month
• Prices paid: 72.6 versus 70.3 last month

The US ISM non-manufacturing PMI rose to 55.4 in August from 54.1 in the prior month, comfortably above the 54.2 estimate. The details point to stronger activity, with business activity rising to 61.7 from 59.1 and new orders increasing to 60.9. However, prices paid also moved higher to 72.6 from 70.3, signaling more widespread cost pressures. Employment improved modestly to 47.8 from 47.4 but remained below the 50 level that separates expansion from contraction.

The reading matters well beyond the services sector itself: services account for the bulk of US economic output and employment, so sustained strength in this survey is one of the most widely watched gauges of whether the broader US economy is holding up. A third consecutive month of readings at or above the mid-54s would be consistent with an expansion that, while slower than in previous years, has repeatedly outperformed expectations for a sharper slowdown.

In other words, service businesses are seeing stronger demand and higher costs, but that strength is not translating into increased staffing. For the Fed, the combination of solid growth and persistent inflation gives policymakers a reason to remain cautious, while the employment component remains a softer spot in an otherwise stronger report. The services data arrive alongside other labor-market indicators that Fed officials have said they weigh closely when deciding the pace of any further rate adjustments.

US yields moved slightly higher following the release, with the two-year at 4.327% and the 10-year at 4.754%. The modest size of the move suggests traders saw the report as confirming, rather than changing, their broader policy outlook.

What does the ISM non-manufacturing data show?

The ISM Services PMI—previously called the ISM Non-Manufacturing Composite—is a monthly health check on the US services economy. It covers businesses such as retailers, banks, hotels and healthcare providers. The different names generally refer to the same headline indicator.

The key level is 50:

• Above 50: The sector is generally expanding.
• Below 50: The sector is generally contracting.
• A decline from 55 to 52: Still expanding, but at a slower pace. It does not mean activity fell 3%.

The composite combines four equally weighted components: business activity, new orders, employment and supplier deliveries. Traders also watch prices paid for inflation clues (source: ISM).

These are measures of the breadth of change—not percentage growth rates. For example, prices paid at 60 does not mean inflation is 60% (source: ISM methodology).

Market interpretation

For market price action, the question is what the report changes about expectations for the economy and the Fed. The following are typical interpretations, rather than guaranteed reactions:

• Stronger activity and hotter prices: Can push Treasury yields and the USD higher as traders price in fewer rate cuts or a greater chance of tightening. Stocks may struggle if higher interest rates outweigh the benefit of stronger growth.
• Softer activity and cooling prices: Can push yields and the USD lower. Stocks may welcome the prospect of easier policy, provided the slowdown does not look severe.
• Strong activity and cooling prices: Can be favorable for stocks because growth is holding up while inflation pressure eases.
• Weak activity and rising prices: Creates a difficult combination. Growth is weakening, but inflation may limit the Fed's ability to provide support.

The surprise versus expectations often matters more than whether the number is above or below 50. For example, a reading of 53 may sound positive because it signals expansion, but if traders expected 56, the disappointment could send yields and the dollar lower. A reading of 53 versus expectations of 51 could produce the opposite reaction.

Put another way, the headline gets the market's attention, but the details help determine whether the move continues. A strong headline accompanied by weaker hiring and softer prices can produce an initial USD rally that subsequently fades.

For a technical trader, the report provides the catalyst. The price action around key levels helps show whether buyers or sellers can maintain control.