US September CPI recap: inflation hits 3.7% as core runs hot — is an October Fed hike back on the table?
Mitrade Insights — It was the print that was supposed to settle the question — and it only sharpened it. US September CPI came in hot across the board on Wednesday: headline inflation 3.7% y/y (3.6% expected), core 2.6% y/y (2.5% expected, 2.4% prior) and core 0.3% m/m — a tenth above consensus. Odds of a hike at the October 27-28 FOMC jumped from about 22% to roughly 37%, peaking near 52% intraday (CME FedWatch, via Reuters and InvestmentNews). And yet the dollar closed lower, gold closed higher, and the S&P 500 fell 1.11%. This is a repricing with a twist — here is the full map.
The numbers that mattered
| Metric | September actual | Consensus | August |
|---|---|---|---|
| Headline CPI, y/y | 3.7% | 3.6% | 3.4% |
| Core CPI, y/y | 2.6% | 2.5% | 2.4% |
| Headline CPI, m/m | 0.6% | 0.6% | 0.4% |
| Core CPI, m/m | 0.3% | 0.2% | — |
Energy did the headline damage: gasoline rose 9.1% m/m and 34% y/y. The core miss is the one that matters for policy — a third consecutive month of firm core readings removes the "pass-through is fading" argument the Fed's doves have leaned on.
What it does to the Fed
The math is blunt: with core at 0.3% m/m, a hold in October is no longer the default. The October 27-28 meeting is now roughly a one-in-three hike — up from one-in-five before the print (CME FedWatch, via Reuters) — with December pricing also hovering near 50%. The FOMC is genuinely split for the first time since this hiking cycle restarted, and two weeks of data now carry outsized weight.
The repricing: who moved, and who didn't
The dollar couldn't hold it. [CHART] The index spiked on the release but stalled just below the 102.000 line — Wednesday's session high was 101.954 — and ended the day at 101.741, down 0.42%: a down day on hot inflation. That is the tell of a market that was positioned long dollars into the number after October's run above 102.
Yields did. The 10-year Treasury yield spiked to 5.278% intraday before settling back — the long end remains the pressure point behind this entire repricing regime.
Stocks got hit. The S&P 500 fell 1.11% to 7,718.94, with only 196 advancers on the day — the narrowest breadth in weeks — and the Nasdaq slid 1.1% to close below the 27,000 round number (26,692.87).
Gold — the counterintuitive one. Spot dipped to $4,099.89, flirting with this month's lows, then reversed to close at $4,138.25, up 0.82% as the dollar's spike unwound. Gold rising on a hot CPI print is the market saying it trades off the dollar and real yields more than off the inflation headline itself — we map that trade in today's gold piece.
* Chart source: TradingView official chart screenshot, data source Capital.com (US Dollar Index).
What to watch
Thursday, 8:30 a.m. ET — September PPI and retail sales (0.3% expected). If producer prices echo the CPI upside, the October hike trade hardens fast.
October 27-28 — the FOMC decision itself. At ~37% and rising, the Fed's next move is genuinely open for the first time this cycle.
The 102.000 line and the long end of the curve. While the dollar stays capped below 102 and yields stop making new highs, the "hot CPI didn't stick" pattern holds — that is the thread the next two weeks will pull.
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