US August CPI lands tonight: after a 5.4% PPI shock, will the Fed hike on September 16?

Mitrade Insights - Tonight's US August CPI is the single most important number left before the Federal Reserve decides on September 16 — and the stakes just went up. Wednesday's producer price index printed at 5.4% year-on-year against a 5.3% consensus, with core PPI accelerating to 4.6%, the fastest since June. Rate futures now price roughly a 70% chance of a 25-basis-point hike at the September 15-16 meeting.

The headline month-on-month figure is expected to jump to 0.4% from 0.1%, a step up that reflects energy costs feeding through after crude oil pushed back above $100 a barrel. The number that matters most for policy, however, is core CPI: consensus looks for it to ease to 2.4% year-on-year from 2.5%, with the monthly pace steady at 0.2%.

Wednesday's producer price report was the trigger for this week's repricing:

• Headline PPI +5.4% y/y versus 5.3% expected and 4.7% previously, with the monthly rate at +0.4%.

• Core PPI rose to 4.6% y/y, the highest since June, as energy and diesel costs moved through the pipeline. Diesel prices at one point surged 24.1%.

• Initial jobless claims held at 206,000, keeping the labour market tight and removing one of the arguments for caution.

The bond market responded immediately. The 10-year Treasury yield closed at 4.968%, its highest since October 2023; the 2-year rose more than 15 basis points to 4.587%; and the 30-year settled at 5.368%, the highest since August 2001. The dollar index climbed 0.29% back above the 99 handle to 99.08.

* Chart source: TradingView official chart screenshot, data feed Pepperstone (US Dollar Index CFD), as of 11 September 2026.

On the surface it seems counter-intuitive. The federal funds target range sits at 3.50% ~ 3.75%, and until this week the market was debating when cuts would resume, not whether hikes would restart. But the combination of an oil-driven inflation impulse, an economy that keeps producing solid labour data, and an ECB that raised rates again on Thursday has shifted the debate.

The ECB lifted its deposit rate by 25 basis points to 2.50%, its second increase this year, and revised up its inflation projections for 2027 and 2028. Global monetary policy is tightening in unison again, and the Federal Reserve is the last major central bank yet to move this month.

Rate futures currently assign roughly a 70% probability to a hike next week. That is a high bar to clear: it means a soft CPI print would not simply remove the hike from the table, it would force a broader repricing of the whole curve.

* Image source: TradingView official Economic Calendar screenshot, Australian Eastern Standard Time (AEST), captured 11 September 2026.

Scenario A — core CPI cools to 0.2% month-on-month or below. This is the consensus and the most market-friendly outcome. Yields would ease from near multi-year highs, the dollar would give back part of its recent gains, and the September hike would move from "likely" to "genuinely in doubt". Gold, which fell 1.93% on Wednesday and broke below its 200-day moving average, would have room to recover; equities would get relief after four consecutive down sessions on the S&P 500.

Scenario B — headline or core CPI comes in above consensus. With energy costs already surging, the risk is skewed toward the upside. A hotter print would cement the September hike, push the 10-year yield toward the 5% mark, strengthen the dollar further, and extend pressure on non-yielding assets. Gold would be exposed to a test of the $4,300 area, and the recent equity weakness would likely continue.

The market has already priced in a good deal of Scenario B. That asymmetry matters: the same headline number can produce a much larger move if it lands on the soft side.

The demand picture is not the only story. Wednesday's selloff was broad, with gold down 1.93%, silver down 5.52%, copper down 4.75% and the S&P 500 down 0.58% for a fourth straight decline. Oil was the outlier, with WTI up 7.49% to $103.94 and Brent up 7.23% to $108.97, both at four-month highs, as supply concerns around key shipping routes persisted.

For Australian readers, the read-across is straightforward. The Reserve Bank of Australia meets on September 29, and markets currently price a 71% ~ 79% chance of a 25-basis-point increase to 4.60%. A hot US CPI would reinforce the global tightening narrative and add to pressure on the Australian dollar, which has already slipped from a four-month high above 0.7230 to around 0.7168.

Bottom line: tonight's CPI is a binary event for the next two weeks of pricing. The consensus expects cooling, the bond market expects firmness, and only one of them can be right.