Inflation Report Breakdown: Latest CPI and PCE Numbers Explained

October 22, 2026 | ATN Trade & Finance

Two inflation reports landed last week — one for the US and one for Canada — and they tell different stories. In the United States, September's Consumer Price Index showed acceleration driven almost entirely by energy, while the underlying services and shelter pressures that the Federal Reserve watches most closely are proving stickier than the headline suggests. In Canada, the September CPI came in below consensus, and the core measures the Bank of Canada uses to make policy decisions are actually running below its 2% target. Here is what the numbers show and what they mean for both central banks heading into their October 28 decisions.

US CPI: September Came In Hot

The Bureau of Labor Statistics released the September 2026 CPI on October 14. Headline inflation rose to +3.7% year over year, up from 3.4% in August and a tick above the 3.6% consensus. Month over month, prices rose +0.6% — the largest monthly gain in over a year. Core CPI (excluding food and energy) held at +0.3% month over month but accelerated to +2.6% year over year, up from 2.4% in August.

The single largest contributor to the headline move was gasoline, which surged +9.1% month over month and +34.2% year over year, reflecting both the Strait of Hormuz supply disruption and Brent crude above $113. Energy overall rose +5.2% in the month and +20.4% year over year. Without energy in the basket, the picture is notably calmer — but not comforting. Shelter accelerated to +0.4% month over month (from 0.3%), with owners' equivalent rent — the single largest component of the CPI — picking up to +0.3%. Core services rose +0.4%, up from 0.3% in August. Core goods, which had been disinflationary for much of the past two years, turned upward: +0.3% month over month, driven by used vehicles (+0.7%), apparel (+0.3%), and recreation equipment. Airline fares rose another 1.2% in September for a 12-month gain of +22.4%.

The three-month annualized rate of core CPI — a leading indicator that strips out calendar distortions — came in at 3.4%, well above the Federal Reserve's 2% target and above the trailing 12-month rate. That acceleration is the most consequential number in the report.

US PCE: The Fed's Preferred Gauge

The Personal Consumption Expenditures price index for August 2026 — the most recent PCE reading, released by the Bureau of Economic Analysis on September 30 — showed headline PCE at +3.4% year over year and +0.3% month over month. Core PCE (excluding food and energy) came in at +3.0% year over year and +0.2% month over month, up from +0.1% in July. The September PCE report will be released October 31.

PCE consistently runs below CPI — not because it captures less inflation, but because its basket is structured differently. Shelter carries approximately 34% of the CPI weight but only about 16% of PCE. This composition difference, combined with PCE's broader coverage of what consumers actually buy versus what they tell surveyors they spend, typically produces a reading 0.5 to 1.0 percentage point below CPI. Both gauges are currently above the Fed's 2% target, but PCE at 3.0% core versus CPI at 2.6% core illustrates how the different baskets can appear to tell different stories. The underlying pressure on services is visible in both; PCE's higher core reading against CPI's lower one reflects its greater sensitivity to medical and financial services inflation.

The August spending data accompanying the PCE release showed real personal consumption rising +0.6% — a strong spending month — while real disposable income was flat. When spending outpaces income, the saving rate compresses; it fell to 4.1% of disposable income in August, a level that leaves limited buffer if energy costs sustain.

Canada CPI: Core Below Target Despite Hot Headline

Statistics Canada released the September 2026 CPI on October 19 — three days ago. Headline inflation rose to +3.1% year over year, up from 3.0% in August but below the 3.2% consensus. Month over month, prices rose 0.1% (not seasonally adjusted) and 0.4% seasonally adjusted.

The headline number is misleading in one important respect: strip out energy, and the picture changes dramatically. CPI excluding gasoline fell to +2.2% year over year (down from 2.4% in August). The Bank of Canada's two preferred core measures — CPI-trim and CPI-median — came in at 1.8% and 1.9% respectively, both below the 2% target and both decelerating from the prior month. The broader CPI-common measure fell to 2.4% from 2.6%. Trim and median are running at a monthly pace of approximately 0.18%, annualizing to roughly 2.2%.

Energy was, as in the US, the engine of the headline: gasoline rose +27.8% year over year (up from +22.8% in August), and fuel oil rose 57.8% — a meaningful burden for Atlantic Canadian households reliant on oil heat. On the other side, grocery inflation slowed to its lowest pace since May 2024 at +1.7% year over year, with fresh vegetables (-2.9%) and sugar and confectionery (-2.7%) providing relief. Shelter inflation nudged up slightly to 1.8% from 1.5%, with rent rising 2.8% and mortgage and home insurance costs up 4.9%.

Two Central Banks, One Date

Both the Federal Reserve and the Bank of Canada meet October 28. Their inflation pictures diverge sharply despite global energy as a shared driver.

For the Federal Reserve, a September CPI at 3.7% headline and a three-month annualized core rate at 3.4% keeps pressure on. The base case is a hold at 3.75%–4.00% — with long Treasury yields having done meaningful tightening without the Fed acting — but the December meeting carries approximately 75–85% implied odds of a hike to 4.00%–4.25%. The Fed cannot declare progress on inflation when the number that matters most to it, core PCE, is running at 3.0% annual.

The Bank of Canada's situation is more complex. The headline 3.1% is above the 2% target, but the core measures the BoC actually targets — trim at 1.8%, median at 1.9% — are running below it. Combined with a September labour force survey that showed employment falling 68,000 and unemployment rising to 6.5%, the case for tightening is considerably harder to make. The September CPI print came in below consensus, and analysts described it as welcome relief from the BoC's perspective. Canada's policy rate sits at 2.25% — far below the US — meaning the BoC is not operating from the same level of pre-existing restraint.

What this means: The inflation data on both sides of the border is being driven primarily by a single shared factor — energy prices tied to the Strait of Hormuz conflict and elevated oil. Strip that out, and the underlying inflation trends in the US and Canada are running in different directions: US services and shelter are re-accelerating, while Canadian core measures are actually below target. For businesses, the divergence matters because it implies divergent monetary policy paths: the Fed is more likely to hike again before year-end than the Bank of Canada is. That interest rate differential has implications for the Canadian dollar, cross-border financing costs, and the relative cost of capital on each side of the border.

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Inflation Report Breakdown: Latest CPI and PCE Numbers Explained

Inflation Report Breakdown: Latest CPI and PCE Numbers Explained

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