• Core CPI was warm again, matching our above-consensus estimate…
  • …but early translation into core PCE is a bit milder
  • Markets reinforced post-Waller reaction by leaning further toward upsizing
  • Three reasons why upsizing could be a mistake
  • BoC pricing was lifted back to a December coin-toss
     
  • US CPI / core CPI, m/m %, SA, October:
  • Actual: 0.4 / 0.3
  • Scotia: 0.3 / 0.3
  • Consensus: 0.3 / 0.2
  • Prior: 0.6 / 0.3

US core CPI landed above consensus and on my estimate at 0.3% m/m SA (0.296% m/m to be exact, hence no rounding effect). When paired with Governor Waller’s pre-data remark that indicated he would lean toward 50bps on December 9th on such a reading the result is that US short-term yields are spiking. The USD 2-year yield is up 17bps on the day including about a dozen points after CPI to add to the sell off post Waller. Pricing for the December FOMC meeting crossed above a quarter point at about 28bps. The result also raised pricing for the BoC’s next decision to about 13bps of a hike in December.

Core CPI was up 3.6% m/m SAAR which continues the elevated readings of prior months (chart 1).

Chart 1: US Core CPI Inflation

REASONS TO BALK AT UPSIZING

Watch for the views of other FOMC officials today and see my morning note for views on how I think upsizing on backward data could be a misstep. That could be one reason for why other voting officials may balk at upsizing if at least some of the voting officials are forecast oriented instead of looking backward.

Another reason against upsizing is what it could reveal about true Fed independence. Go 50 and some say you’ll look political after having skipped just days before the midterms and then catching up afterward. That could compromise efforts to claim policy independence but also make it look like December would be one-and-done for upsizing as a catch-up.

Another reason against upsizing is that while we still need PPI on Friday and then final adjustments, accounting for weighting differences knocks down core CPI upon translation into core PCE maybe by half a tenth to being on the bubble between 0.2% and 0.3% m/m SA. The Fed follows core PCE, not core CPI, and they’ll get the estimate before the next decision.

DETAILS

Core services prices (ie: ex-housing services and energy services) were up by 0.3% m/m SA, or 4.9% m/m SAAR. Core goods CPI (ex-food and energy) was up 0.2% m/m, or 2.4% m/m SAAR. This was a services story as shown in charts 2 and 3.

Chart 2: US CPI Core Services Ex-Housing & Energy; Chart 3: US Goods Inflation

Chart 4 shows that this was not a particularly warm October in terms of m/m seasonally unadjusted (NSA) prices compared to like months of October in time. The reason why core was warm is because they backed off on the SA factor (chart 5).

Chart 4: Comparing US Core CPI for All Months of October; Chart 5: Comparing US Core CPI SA Factors for All Months of October

Recall that there are no y/y rates because of the gov't shutdown last October that resulted in no October CPI but using interpolation for October 2025 we can roughly estimated this October's y/y rates at 3.95% (3.71% prior) for headline and 2.77% for core (2.56% prior)

Charts 6–17 break down parts of the basket. Shelter prices increased by 0.3% m/m SA primarily due to the weight applied to owners’ equivalent rent that was up 0.3 as primary rent was up 0.2%.

Chart 6: US Food Prices; Chart 7: US CPI: Gasoline; Chart 8: New vs Used Vehicle Inflation; Chart 9: Housing Inflation
Chart 10: US Rent Inflation; Chart 11: US CPI: Household Furnishings; Chart 12: US Apparel; Chart 13: US CPI: Recreation Services
Chart 14: US CPI: Recreation Goods; Chart 15: US Airfare; Chart 16: US Motor Vehicle Insurance; Chart 17: US Hospital Services

Food prices are stripped out of core, but they were a hot influence on headline CPI. Prices for food at home (ie: groceries) were up 0.4% m/m SA while food away from home (ie: restaurants etc) were up 0.5% m/m SA.

Charts 18 and 19 break down the CPI basket in m/m unadjusted terms and weight contributions to the change in prices respectively. Also see the detailed table.

Chart 18: October Changes in US Headline CPI Categories; Chart 19: October Weighted Contributions to Monthly Change in US Headline CPI
Table: US Inflation Component Breakdown
Table: US Inflation Component Breakdown
Table: US Inflation Component Breakdown