ISM Manufacturing 54.5 in September as Prices Paid Hit 77.9

The September ISM manufacturing index slipped to 54.5, just under forecasts, while prices paid jumped to 77.9, pressuring stock market today as yields climbed.

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U.S. factory activity grew for a ninth consecutive month in September, but a surge in input costs overshadowed the headline. The Institute for Supply Management reported on Thursday, October 1, that its manufacturing PMI stood at 54.5, down 0.1 point from August and slightly under the 54.9 consensus. The prices-paid index climbed to 77.9 from 71.1, the sharpest monthly rise in the report's major components and the highest reading since May. Equities weakened as the data landed on top of a bond selloff.

What Did the September ISM Report Show?

The report showed a manufacturing sector still expanding at a solid pace, with the cost side of the ledger deteriorating. Any reading above 50 signals growth, and ISM said the 54.5 level is consistent with roughly 2.4% annualized real GDP growth. The wider economy has now expanded for 23 consecutive months.

The components were mixed:

• New orders rose 1.6 points to 55.3.
• Backlog of orders gained 4.6 points to 56.4.
• Employment improved 1.5 points to 52.7.
• Production eased 1.6 points to 56.7.
• Inventories contracted at 48.6, down 2.0 points.
• New export orders slowed to 50.9 from 53.2, close to the line between growth and contraction.
• Supplier deliveries registered 59.0, signalling continued slow delivery times.

Twelve industries reported growth, led by electrical equipment, primary metals, computers and electronics, machinery and transportation equipment. Only printing and textile mills contracted.

Why Did Prices Paid Jump to 77.9?

Prices paid jumped because manufacturers face overlapping cost pressures from tariffs, volatile commodity markets and the Iran war. Respondents cited pricing volatility in 46% of negative comments, tariffs in 34% and the Iran war in 30%. Producers pointed specifically to petroleum-based inputs, where conflict-related disruption has lifted costs.

A reading of 77.9 means a large majority of purchasing managers paid more for materials than a month earlier. The 6.8-point rise from August's 71.1 is the type of move that tends to feed into producer prices and, with a lag, consumer inflation. Labor constraints added to the squeeze, with respondents reporting severe worker shortages that limit output even as backlogs build.

Why Did Markets React This Way?

Markets reacted negatively because the data reinforced an inflation-and-rates narrative already driving Treasuries. The 10-year yield reached 5.34%, its highest level since 2002, after the Treasury market's worst quarter in decades, and was near 5.27% in morning trading. Higher yields raise discount rates on equities and compete directly with stocks for investor capital.

In morning trading, the Dow Jones Industrial Average was down about 0.5% near 50,669, the S&P 500 was off 0.3% near 7,628 and the Nasdaq Composite had fallen about 0.4% near 26,756. The VIX volatility gauge rose nearly 6% to about 17.3. November crude futures gained roughly 2.3% to about $92.50 a barrel, adding to the energy-cost concerns in the survey.

Technology shares lacked support as the AI trade cooled. Amazon (AMZN), Advanced Micro Devices (AMD) and Intel (INTC) declined. Micron Technology (MU) reported adjusted earnings of $33.42 per share against $31.83 expected, yet its shares moved little as rate concerns outweighed the beat.

How Does This Affect the Federal Reserve's Next Move?

The report complicates the path for the federal reserve because it shows cost pressures building while growth stays firm. A manufacturing sector expanding at a 54.5 pace gives policymakers little reason to see demand weakness, and a prices index near 78 points to renewed inflation risk in goods. That combination argues against easing and keeps attention on whether the central bank prioritizes price stability over growth.

The labor market offers no offsetting weakness. Initial jobless claims fell to 197,000, the fourth straight weekly decline. With employment steady and input costs rising, bond markets are pricing a tighter policy stance for longer, which is the main channel by which the ISM data reached equities on Thursday.

What Comes Next for Manufacturers and Markets?

The next test is whether elevated input costs pass through to producer and consumer price data. Surveys of this kind typically lead official inflation readings by a few months, so the October and November releases will show whether the September jump persists. Slower export orders and falling inventories suggest producers are not stockpiling ahead of price increases, which points to cost pressure driven by supply constraints rather than speculative buying.

Three variables will shape the near-term outlook:

• Energy prices: crude near $92 keeps petroleum-linked inputs expensive while the Iran conflict remains unresolved.
• Tariff schedule: respondents continue to flag tariff costs and sourcing challenges.
• Treasury yields: a sustained move above 5.3% on the 10-year would keep pressure on equity valuations, particularly growth and technology names.

Outlook

September's ISM report confirmed that U.S. manufacturing remains in expansion but showed costs accelerating faster than activity. The 54.5 headline missed forecasts by a narrow margin, while the 77.9 prices-paid reading marked the strongest cost signal since May. With yields at multi-decade highs, strong jobless-claims data and oil above $90, investors enter the fourth quarter focused on inflation persistence and the federal reserve's response, rather than on the modest shortfall in the headline index.