The Economy — Digest
TL;DR
The September CPI printed hot on every line — 3.7% headline, 2.6% core, with the surprise broadening beyond energy into software (a record +28% y/y) and shelter — spiking October hike odds to ~54% before Fed officials talked them back down to ~32% overnight. Meanwhile, Social Security's 3.6% COLA landed below the very index it's tied to, and the long end rejected 5.3% for a third time as AI-credit unwinds did the bond market's work.
The hot CPI changed the December math, but not the October one — yet
The gate print broke against the doves. September CPI beat consensus on every line — headline +0.6% m/m / 3.7% y/y, core +0.3% / 2.6% — and the surprise wasn't just gasoline's +9.1% month, which accounted for over half the all-items increase; shelter added +0.4%, used cars +0.7%, airfares +1.2% (September CPI finding). Futures traders briefly priced a near 50-50 chance of 50bp of hikes by December, and year-end hike odds went above 96%.
"This means that inflation is broadening out, something that is not a good omen for the Fed and would raise the probability for an increase in rates at the end of the October FOMC meeting." — Eugenio Aleman, Raymond James, via Reuters
Then came the overnight reversal: Bowman and Daly said the central bank can wait for a clearer picture, and October odds pared back to 31.6% in Asian hours — barely above the ~22% they'd been a day before the print (CPI finding). That's the pattern that matters: the data is now hot enough that markets keep trying to price the October hike, and Fed speech keeps erasing it. Deutsche Bank flags the timing trap — PCE, the Fed's actual target, won't arrive until the day after the Oct 27–28 decision, days before the Nov 3 midterms.
What to watch: Thursday's PPI and retail sales at 8:30 a.m. — the last data before the FOMC, and the last chance for the data to out-shout the doves.
The COLA arrived with a receipt showing it's already too small
The household squeeze got its annual adjustment, and the adjustment lost. The SSA set the 2027 COLA at 3.6% — the largest since 2023's 8.7% — worth $75/month on average for ~72 million recipients, but it's computed off a CPI-W that rose 3.9%, meaning the index benefits are tied to is outpacing the raise itself (COLA finding). Medicare Part B premiums are projected to rise to $209.50 from $202.90, eating further into it.
"76% of respondents said a 3.5% COLA would not be enough." — COLA finding
The energy math underneath is brutal and dated: 2026 has now logged a record 158 days above $4/gal, diesel sits at $6.2997 — up 72% year over year — and the IEA's October report says the gasoil balance "will remain tight well into 2027," with inventory replenishment "unlikely before 2H27" (COLA finding). US distillate stocks are at 1982-era lows. Pew finds 74% of Americans very concerned about energy prices, up from 43% in January — six days before a midterm. The Russian-diesel relief valve, meanwhile, is leaking air: the first cargo is sailing to Morocco, not the US, and EU commissioner Dombrovskis says the volumes "are anyway not going to have any macroeconomic significance."
What to watch: whether pump prices break before Nov 3 — the EIA sees diesel above $6 through October, so the question is whether the narrative relief keeps arriving faster than the barrels.
The 5.3% ceiling held a third time — because AI broke first
The hottest CPI in months couldn't hold the long end above 5.3%. The 10-year spiked to 5.33% on the release, and for the third time buyers re-emerged once it topped that level, with the yield back to 5.18% by late session (long-end finding). The real work happened overnight: with the S&P down 1.1%, the Nasdaq down 1.9%, and KOSPI off 5.6% as AI-leverage trades unwound, the 10-year fell to a three-week low of 5.1267%.
"While the initial selloff was triggered by the hotter-than-expected CPI, tech was the main driver of today's selloff... AI was again the main challenge... with financing risks and IPO timelines still at the centre of the story." — JPMorgan, via Reuters
This extends last cycle's IMF fragility warning into live market action: the AI buildout is now functioning as a bond-market shock absorber, pulling yields down precisely when inflation data says they should rise. The paradox for households is that a hot inflation print may end up easing mortgage-rate pressure at the margin, not worsening it (long-end finding).
What to watch: whether the AI unwind continues — if it stalls, the 5.3% level gets tested again with nothing but CPI behind it.
What surprised us
- Software inflation is real and record-setting. Software prices up 28% y/y — the largest increase ever — means the AI buildout is showing up in the CPI basket itself, not just in capex lines. The FOMC's AI-inflation channel from two cycles ago now has a line item.
- The Fed talked down a 96% certainty overnight. Year-end hike odds above 96% after the print, ~32% by morning — Bowman and Daly moved markets more than the hottest CPI in months. The October hold is being chosen, not earned by the data.
- The COLA's own index beat the COLA. A 3.6% raise against a 3.9% CPI-W is a designed shortfall, and AARP's 76% say everyone already knows it.
- Food was the report's only friend. Flat m/m, food-at-home down 0.1% — the one line of the household basket not on fire this month.
Open threads worth a vote
- September PPI + retail sales (Oct 15) — the last data before the FOMC; a hot PPI keeps October alive.
- October CPI (Nov 10) — the first post-midterm print, and the decider for December.