US input costs rose at the fastest pace in four years — the September flash PMI beat is an inflation story, not a growth story

Mitrade Insights — The September flash PMIs were reported as a growth story. They are not. The composite reading of 58.4 was a 62-month high, but the line that repriced markets was input costs, which rose at the fastest pace since October 2022 — driven by fuel and transport costs, with manufacturing raw-material prices tied to supply shortages. Traders responded by pushing the 10-year Treasury yield to 5.11%, its highest since July 2007, and the odds of an October Fed hike to roughly 70%. This is a price story wearing a growth headline.

Chris Williamson of S&P Global Market Intelligence did not mince words, saying the jump in input costs "will add further to the upward pressure on selling prices and inflation in the coming months."

Note the asymmetry embedded in that table: input costs are accelerating faster than selling prices, because competition is absorbing part of the hit. That is a margin problem today and an inflation problem tomorrow — which is exactly why bond markets moved first.

Input cost inflation does not appear from nowhere. The chain runs as follows:

• Brent crude is back above $100. The November contract settled at $103.08 on September 23, up 3.86%, ending a five-day slide, after Iranian officials signalled the Strait of Hormuz would not reopen until conditions were met, keeping Middle East supply-route risk in the price. Brent is trading around $102.39 in Asia on Thursday.

• US retail diesel is at a record, up more than 80% year to date. That shows up directly in every freight and haulage contract in the S&P survey.

• Supply chains are re-tightening. September saw the most widespread supplier delays since July 2022, and manufacturers reported raw-material shortages rather than weak demand.

• Wages are adding to it. Service-sector input cost inflation hit its highest since November 2022, with employment growth the fastest in over four years.

* Chart source: official TradingView screenshot (OANDA:BCOUSD).

The repricing was violent and concentrated in the front end:

ING attributed roughly 80–85% of the move to real rates rather than inflation expectations — an important distinction, because it means the market is repricing the policy path, not panicking about prices. Fed Governor Michael Barr reinforced it the same day, saying further policy adjustments may be needed. And the paper itself is meeting resistance: a $70 billion five-year note auction drew weak demand, with dealers absorbing an unusually large share.

* Chart source: official TradingView screenshot (OANDA:USB10YUSD). Price and yield move inversely.

Scenario A — the cost pass-through shows up in the data. Selling prices catch up to input costs, PCE comes in hot, and October hike odds push through 80%. The 10-year holds above 5%, the dollar index extends toward 101, and gold stays capped below its 200-day average. Risk assets take the brunt.

Scenario B — oil gives back the spike. Brent slips back below $100 on a Hormuz reopening, supply-chain delays ease, and the input-cost surge proves to be a fuel-driven blip rather than a broad price cycle. Ten-year yields retreat toward 4.90%, the dollar index fades back under 100, and October hike pricing falls back to a coin flip.

Tonight: US initial jobless claims (consensus around 201K, prior 196K), final Q2 GDP revisions and more Fed speakers. Then ADP employment and final Q2 GDP on September 30, and non-farm payrolls on October 2, consensus 100K against 162K prior — a soft print would cut against the inflation narrative. The FOMC meets October 27–28.

* Chart source: official TradingView economic calendar widget.

The risk in both directions is the same one: this is a fuel-led cost shock landing on an economy whose services sector is accelerating. That combination is harder for a central bank to look through than either half on its own.