Informopedia Explains: on Wednesday, Canada’s central bank raised interest rates because energy prices are too high. Raising rates cannot pump a single extra barrel of oil. It cannot reopen a blocked strait, end a war, or make petrol cheaper at the pump this week. So why do it — and why did Canada hike on the very same day the United States chose to hold?
The short answer is that central banks are not trying to fix the price of oil. They are trying to stop the price of oil from infecting everything else.
The pass-through chain
Start with what actually happens when oil jumps. Fuel gets more expensive first — petrol, diesel, heating oil, jet fuel. Then transport gets more expensive, because almost everything travels by truck, ship or plane. Then the goods that travel get more expensive, because their makers pass on the higher freight bill. Food is hit twice: it travels, and it is grown with fuel and fertiliser made from fossil fuels. Economists call this pass-through, and it is why an oil shock shows up in the supermarket within weeks, not years.
Canada’s case this week is textbook. Headline inflation ran at around 3% in September, above the bank’s 1% to 3% target range, driven almost entirely by energy and energy-related transport costs. Core measures of inflation, which strip out volatile items like fuel, had actually eased below 2% — the midpoint of the target. The bank hiked anyway, because it feared what comes next.
Second-round effects: the real enemy
The real enemy has a dull name: second-round effects. When fuel stays expensive for months, workers reasonably ask for higher wages to cover the cost of living. Firms, facing higher wage bills and higher transport costs, raise their prices again. Workers ask again. A one-off rise in the relative price of oil becomes a general rise in all prices — and once that spiral starts, it is far harder to stop than the oil shock that triggered it. Interest rates cannot create extra oil supply, but they can cool demand and, crucially, expectations: if businesses and workers believe the central bank will act, they are less likely to build permanent price and wage rises on top of a temporary shock.
That is why Governor Tiff Macklem framed the decision as insurance, not punishment. “With the outlook for inflation substantially higher and the economy showing resilience, an increase in the policy rate is needed to reduce the risk that elevated energy prices could spill over and become generalized inflation,” he said. The bank now expects inflation around 3% through most of 2027, returning to 2% only around mid-2028.
Why not just wait?
The obvious objection is that oil prices might fall on their own — and central banks have been burned before by hiking into a shock that reversed. Macklem’s answer, implicit in the decision, is about asymmetry: if the bank waits and the shock proves persistent, it must hike harder later, into an economy already damaged by entrenched inflation. If it hikes early and the shock fades, the cost is a few months of dearer borrowing. The bank even left itself room, saying further increases “could” be needed but that it will “proceed carefully”. Markets heard a hawkish lean anyway: swap traders put roughly a 45% chance on another hike in December.
The contrast with the Federal Reserve, which held its rate the same day, is instructive rather than contradictory. The two economies face different inflation mixes, different labour markets, and different politics — the Fed is also navigating a midterm election week. Central banking is not a formula; it is a judgement about which risk is worse, made with incomplete data.
What it costs
None of this is free. Higher rates push up variable-rate mortgages, lines of credit and car loans, and they weigh on growth and hiring. Macklem said so himself: “Higher interest rates aren’t going to immediately feel like they are helping.” The honest version of the policy is that it trades certain, visible pain today — dearer borrowing for households already squeezed by fuel prices — against uncertain, larger pain tomorrow if inflation takes root. Whether that trade was right will only be clear in hindsight, when we know whether energy prices stayed high or faded. That is the uncomfortable core of monetary policy: the bank must act before it knows, because by the time it knows, it is too late.
What to watch: the Bank of Canada’s December decision, whether energy costs start appearing in services prices (haircuts, rents, restaurant meals — the places pass-through shows up last), and whether wage growth starts chasing fuel prices. If services inflation stays calm, this week’s hike may stand alone. If it climbs, Canada’s first hike in three years will not be its last.
