Brent crude closed Monday at US$110.74 on the front-month continuous contract, 11.0% above its September 28 close of US$99.78. Over the same four weeks the S&P/TSX Composite gained 1.3%, from 35,489.86 to 35,944.16.
The mismatch matters because the Bank of Canada announces its rate decision Wednesday at 9:45 a.m. ET while the U.S. Federal Reserve is also meeting this week. In a Reuters poll of 34 economists conducted October 21 to 23, 19 expect a quarter-point hike to 2.50%. The previous poll found 80% expecting the rate to hold at 2.25% through the end of 2026.
Brent and TSX daily moves across 18 paired sessions since September 29 show almost no relationship, with a correlation of -0.18. The four sessions in which the TSX moved 1% or more all came on days when Brent moved 0.5% or less.
Each dot is one session; October 19 is excluded because the Brent series changed contract that day, and the October 13 observation spans the Thanksgiving closure of the TSX for both series. Brent is the Investing.com continuous front-month series, which differs from some December-contract quotes cited elsewhere.
None of this makes oil irrelevant to Canadian households. Gasoline was up 27.8% from a year earlier in September and drove most of the rise in headline inflation to 3.1%, according to Statistics Canada figures reported by MoneySense. Oil is a real force in the economy, and a weak predictor of what the index does on a given day.
The Availability Heuristic Turns a Pump Price Into a Portfolio Forecast
Amos Tversky and Daniel Kahneman described the availability heuristic in a 1973 paper in Cognitive Psychology. People judge how likely or how important something is by how easily examples come to mind. A variable that is vivid, frequent and emotionally charged gets more weight than one that is quiet and statistical.
Oil fits that description this month. The war with Iran, which Reuters dates to February, supplies a daily stream of tanker, shipping and price headlines, and gasoline is the most visible price in any household. The effect on the index is diffuse by comparison, and over four weeks the TSX rose.
Kahneman summarized the mechanism in Thinking, Fast and Slow in 2011 with the line that what you see is all there is. The data here cannot say what moved the TSX on its four largest days, October 7, 9, 14 and 15. They say only that oil was nearly still on each of them, and that the driver of the index was somewhere other than the front page.
Loss Aversion and Narrow Framing Make a Gain Feel Like a Loss
Kahneman and Tversky showed in a 1979 Econometrica paper on prospect theory that people code outcomes as gains or losses against a reference point, and that they weigh losses more heavily than equivalent gains. Their 1992 estimate put the ratio near 2.25 to 1. For many equity holders the reference point is the peak, and the TSX closed Monday about 3.0% below its August high of 37,069.
Benartzi and Thaler extended the idea in a 1995 Quarterly Journal of Economics paper on myopic loss aversion. Investors who evaluate their holdings often see more losses and hold less equity than investors who look rarely. In this window, 7 of 18 sessions closed lower, so a daily checker met a loss on 39% of days while the four-week result was a gain.
The labour market gives the worry a real foundation. Canada lost 68,000 jobs in September and the unemployment rate rose to 6.5%. The anxiety is not irrational. It has rational roots that the oil price happens to be absorbing.
What a Dated Event Does to Attention
The Bank of Canada decision converts diffuse macro worry into a single dated event, and the economists are split. Royce Mendes, managing director and head of macro strategy at Desjardins, said the poll responses suggest more serious inflationary pressures are coming. Benjamin Reitzes, Canadian rates and macro strategist at BMO, said the Bank would rather risk hiking slightly early than fall behind the curve, as it did in 2021 and 2022.
RBC economists still expect a hold through the rest of 2026, according to MoneySense. A quarter-point hike would lift the lowest variable mortgage rate from 3.43% to about 3.7%, according to Ratehub.ca. Households on variable rates have a concrete stake in Wednesday, and investors with equity exposure have an indirect one.
Decision days draw more attention than their information content justifies, which is a form of narrow framing: one number is judged apart from the whole portfolio and the whole plan. Barber and Odean studied 66,465 households at a large discount broker in a 2000 Journal of Finance paper. The households that traded most earned 11.4% a year from 1991 to 1996, against 17.9% for the market.
The Measured Fact and the Vivid Fact
Going into Wednesday there are two stories available. The vivid one is a Brent price up 11.0% in four weeks, gasoline up 27.8% and a central bank that may raise rates into a weakening labour market. The measured one is a TSX up 1.3% over the same period, a daily correlation with oil of -0.18 and four large index moves that oil did not explain.
Both stories are accurate. Behavioural research does not say the vivid story is wrong. It says the vivid story is the one that gets acted on, and that the cost of acting on it tends to show up in portfolio returns rather than in the headlines.
If the Bank of Canada hikes, the vivid story gets another chapter. If it holds, the vivid story gets a different one. In either case the 18-session record shows the index has been following a quieter story than the one in the headlines.