October CPI cooled, but the December Fed call is still a hold
Core inflation has run at about 3.7% annualized over three months, even as the headline reading cooled. The Fed's last vote was to hold, and its December meeting comes before the next CPI report.
US headline consumer prices rose 0.4% in October, down from September's 0.6% increase. Core CPI, which excludes food and energy, held at 0.3% for a third consecutive month. The headline slowdown offers some relief from September's acceleration. The underlying picture gives the Federal Reserve little reason to declare that price pressure has dissipated.
CTOL's base case is that the Fed holds its target rate at 3.75% to 4.00% in December rather than raises it. The latest recorded FOMC vote was 10–2 in favour of holding, and October's mixed inflation report does not make a decisive new case for tightening. Recent core momentum has strengthened, though, so an expectation of imminent borrowing-cost relief is hard to defend on this evidence.
For rates investors, refinancing-dependent businesses and long-duration equity holders, the distinction matters. A softer headline CPI reading is not enough to assume lower financing costs. Persistent core inflation is not proof that another rate hike is coming either. The more defensible near-term risk is that borrowing conditions stay demanding for longer, rather than turning suddenly more restrictive through a new rate increase.
Seasonally adjusted US CPI month-over-month changes from April through October 2026.
View data
| Month | All items, % | All items less food and energy, % | Shelter, % | Transportation services, % |
|---|---|---|---|---|
| Apr 2026 | 0.6 | 0.4 | 0.6 | 0.3 |
| May 2026 | 0.5 | 0.2 | 0.3 | -0.6 |
| Jun 2026 | -0.4 | 0 | 0.1 | -0.3 |
| Jul 2026 | 0.1 | 0.2 | 0.1 | 0.3 |
| Aug 2026 | 0.4 | 0.3 | 0.3 | 0.5 |
| Sep 2026 | 0.6 | 0.3 | 0.4 | 0.6 |
| Oct 2026 | 0.4 | 0.3 | 0.3 | 0.8 |
Core momentum has strengthened despite the headline slowdown
The most useful calculation in October's CPI release is the change in the rolling three-month pace of core inflation. An annualized version of the latest headline figure tells us less.
Core CPI rose 0.3% in August, September and October. Compounding those monthly changes gives approximately 0.9% over three months, equivalent to a 3.7% annualized pace. That compares with approximately 3.2% over July–September and 1.6% over May–July.
| Core CPI period | Monthly changes | Annualized three-month pace |
|---|---|---|
| May–July | 0.2%, 0.0%, 0.2% | 1.6% |
| July–September | 0.2%, 0.3%, 0.3% | 3.2% |
| August–October | 0.3%, 0.3%, 0.3% | 3.7% |
Source: CTOL calculations from the monthly seasonally adjusted core CPI figures in the BLS October release. The calculations use rounded monthly changes. These annualized rates describe recent momentum, not observed 12-month inflation or a Federal Reserve forecast.
The three-month comparison is sensitive to the unusually soft June reading and to the rounding of monthly figures. It does not establish that inflation will continue accelerating.
It does support a narrower finding. The recent core CPI pace is materially firmer than it was around midyear, and October did not interrupt that pattern.
The component data explain why October should not be classed simply as an inflation acceleration or a disinflation breakthrough.
Energy's monthly inflation rate fell from 5.2% in September to 0.7% in October, while food inflation rose from zero to 0.5%. Shelter moderated from 0.4% to 0.3%, but transportation services accelerated from 0.6% to 0.8%. Used cars and trucks fell 1.2%.
That mix is important. The energy deceleration and softer shelter reading argue against treating October as a uniformly inflationary month. Persistent core inflation and stronger transportation services argue against reading the lower headline as broad-based relief.
Shelter also carries a much greater index weight than energy, at 35.238% compared with 7.649%. Its modest moderation therefore deserves attention when judging how durable inflation is. Those weights alone, however, do not establish each category's contribution to October's overall CPI change.
The monthly data and the unavailable annual comparison also need separating. Many October 2025 index values are missing following the 2025 lapse in appropriations, so conventional year-over-year comparisons cannot be calculated for the affected series. That limitation does not invalidate the observed monthly inflation path or the rolling core momentum comparison.
The Fed's last vote favoured holding, and December offers no new CPI confirmation
On October 28, the FOMC held the federal funds target range at 3.75% to 4.00%. The vote was 10–2, with Lisa D. Cook and Beth M. Hammack preferring a 25-basis-point increase.
That is a meaningful policy split, but the Committee is not evenly divided. Ten members favoured holding rates, while two wanted to tighten.
The October decision came before the November 10 publication of October CPI. The two dissenting votes therefore reflect an existing preference for tighter policy, not a documented reaction to the newly published October inflation figures.
The FOMC statement describes inflation as elevated and says the Committee needs additional information to determine the appropriate policy stance. October's core CPI performance reinforces the reason for caution. A decision to raise rates would still need sufficient support within a Committee that most recently chose to hold.
The next meeting is scheduled for December 8–9, when the Fed will also publish a Summary of Economic Projections. November CPI is scheduled for release on December 10, after that meeting.
That timing is a specific constraint. The Fed can consider October CPI and other information available before its meeting. It cannot use the later November CPI release to confirm whether October's core persistence continued.
The timing favours distinguishing the evidence for maintaining a restrictive policy posture from the stronger evidence needed to justify an additional hike.
The case for tightening is not negligible. Core CPI's recent momentum has firmed, transportation services inflation has accelerated, and two FOMC members already preferred a higher policy rate.
The counterargument is substantial. Headline inflation decelerated, shelter moderated, used-vehicle prices declined and the overwhelming majority at the last meeting favoured holding rates.
CTOL judges the second argument stronger for the immediate December decision, while the first makes an early declaration of inflation relief premature.
The financial risk is delayed relief, not a demonstrated new rate shock
For companies with near-term refinancing needs, keeping the current interest-rate environment can itself be expensive. Higher-for-longer borrowing costs can constrain investment and pressure cash flow even without a fresh policy increase.
For long-duration technology equities, the difference between rates staying elevated and markets unexpectedly pricing additional hikes is equally important.
A higher expected path of rates can pressure valuations through discount rates. That is a transmission mechanism, not evidence that October's CPI release has already changed market pricing.
The available figures support an inflation and policy-risk assessment. They do not show an observed movement in Treasury yields, interest-rate futures or technology valuations.
Investors should therefore evaluate their sensitivity to continued borrowing-cost pressure, without treating a December hike or a technology selloff as an established consequence of this release.
December will test the policy call before the inflation trend gets its next reading
The first test arrives at the December 8–9 FOMC meeting. A hold would support CTOL's immediate policy judgment, although the Committee's projections, statement language and dissent pattern could still point to a changing outlook for later meetings.
A 25-basis-point increase, taking the target range to 4.00%–4.25%, would overturn the December hold call.
The second test arrives December 10, when the next CPI report will show whether the recent core inflation pace is subsiding.
The arithmetic is straightforward. With September and October core CPI each at 0.3%, a November reading of 0.2% would lower the rolling three-month annualized pace to approximately 3.2%. Another 0.3% would leave it near 3.7%, while 0.4% would raise it to approximately 4.1%.
These are sensitivities based on the existing rounded monthly series, not predictions. They test core momentum more rigorously than requiring every selected CPI component to move below its October rate.
CTOL expects a December hold with moderate confidence. That view rests on persistent but mixed October inflation evidence, a firmer three-month core trend and a 10–2 FOMC majority that most recently chose not to tighten.
A December 9 rate increase would falsify the immediate policy call. The November CPI release the following day will test whether core inflation momentum is easing, remaining firm or accelerating further.
Until those observations arrive, the most defensible conclusion is that October's cooler headline does not justify assuming cheaper money is close. Its persistent core reading does not establish that another hike is imminent either.