On the afternoon of Friday, May 15, two things happened simultaneously on the TSX that should not, under standard portfolio theory, have happened at the same time. Gold miners collapsed — Agnico Eagle fell 6.2%, Barrick lost 5.8%, Wheaton Precious Metals shed 6.1% — while energy names advanced, with Canadian Natural up 1.2% and Suncor adding 2.5%. The composite index fell 1.27% to 33,833 and erased essentially all of its year-to-date recovery. The cause was a global bond market selloff that sent the US 10-year Treasury yield to 4.6% and the 30-year to the edge of its 2023 peak, driven by the failure of Trump's Beijing summit to produce any Hormuz breakthrough and renewed fears that central banks will need to raise rates rather than cut them.
What that session illustrated was not simply a bad Friday. It illustrated a specific cognitive trap that behavioural finance researchers have documented extensively and that is now operating across Canadian investor portfolios in its most dangerous form.
The Anchor That Moved Without Notice
In their 1974 paper "Judgment Under Uncertainty: Heuristics and Biases," Daniel Kahneman and Amos Tversky identified anchoring as one of the most pervasive and resistant cognitive errors in human judgment. The mechanism is precise: when asked to estimate an uncertain value, people begin from an initial reference point — an anchor — and adjust from it. The critical finding was not that people anchor. It was that they adjust insufficiently. The final estimate clusters too close to the starting point, regardless of how arbitrary or outdated that anchor is.
WTI crude oil was trading at approximately $62 per barrel in January 2026. By early May, it had crossed $100. Eleven weeks of sustained elevated prices have done something measurable to investor psychology: they have shifted the anchor. Clients who once treated $62 as "normal" and $100 as a crisis premium are now treating $100 as a new reference point — and interpreting any short-term dip in crude as evidence that the premium is fading. The adjustment is happening, but it is happening insufficiently, in exactly the pattern Kahneman and Tversky described. Clients are not updating to the possibility that $100-plus oil is the new structural baseline for an extended period. They are treating every week of elevated prices as a temporary deviation from an anchor that has already moved.
The chart above shows WTI crude oil prices from November 2025 through the week of May 15, 2026, annotated with the key events that drove each inflection — the February 28 Hormuz closure, the April 8 ceasefire, the resumed restrictions, and the May 15 bond rout session that sent crude back above $101 on stalled deal progress.
The pre-war average of approximately $71 WTI (November 2025 through February 23, 2026) has been displaced by a new clustering near $100, reflecting the anchoring shift documented in the article. The May 15 close at $101.02 occurred on resumed selling pressure following the Trump-Xi summit's failure to produce Hormuz progress.
The Second Anchor: Rates That "Should" Be Low
Anchoring is not operating only on oil prices. The May 15 global bond selloff exposed a second, equally significant anchor failure in Canadian investor psychology. The US 10-year Treasury yield rose 12 basis points on May 15 to 4.6%, its largest single-week jump since Trump's tariff shock in April 2025. Japan's 30-year yield hit 4% for the first time since 1999. Canada's bond yields moved in sympathy, compressing the spread that had been supporting the case for rate cuts.
Canadian investors who spent 2020 through 2022 in a near-zero rate environment have an anchor problem that mirrors the oil situation exactly. They are adjusting insufficiently from the low-rate anchor, treating the post-2022 rate structure as a temporary deviation that will eventually "normalize" back toward zero. The research on anchoring and adjustment — Epley and Gilovich's 2006 extension of Kahneman and Tversky's original framework — shows that this pattern intensifies when the anchor was experienced during a period of strong portfolio performance. The 2020-2022 bond and equity bull market created an exceptionally strong psychological anchor, and insufficient adjustment from it is now producing specific observable errors.
Gold miners provided the clearest illustration on May 15. Clients who hold Agnico Eagle, Barrick, or Wheaton Precious Metals through TFSAs or non-registered accounts anchored on gold's role as a rate-cut beneficiary and an inflation hedge. When higher rates and higher inflation arrived simultaneously — the classic stagflation configuration — gold fell because the rate-hike expectation overwhelmed the inflation-hedge thesis. Clients anchored to the simple "inflation up, gold up" framework had not adjusted to the more complex "stagflation resets gold's relationship with both variables" reality.
Why the Timing Matters for Advisors
Anchoring errors are most expensive at inflection points — when a regime genuinely changes and investors continue to apply the old anchor to new conditions. The period between now and the Bank of Canada's June 10 rate decision represents precisely such an inflection. Statistics Canada releases April CPI on May 19. The Bank of Canada projected inflation would peak near 3% in April. If the actual print arrives above that projection, the probability of a rate hike at June 10 rises materially. If it arrives below, the hold scenario extends. Either outcome will arrive in a market where clients are already anchored to one of two incomplete reference points: the pre-war low-inflation world, or the "oil crisis is temporary" assumption.
The advisor who understands anchoring is positioned to do something specific: not to reassure clients that their anchor is correct, but to surface the anchor explicitly and examine it. Richard Thaler and Cass Sunstein's 2008 work on choice architecture is directly applicable here. The structure of how information is presented to clients determines which anchor activates. Framing April CPI as "the Bank said 3%, let's see if they were right" activates a forward-looking analytical frame. Framing it as "this is a reminder that things were normal before the war" activates the old anchor and produces insufficient adjustment.
The TSX is closed today for Victoria Day. When markets reopen Tuesday, the CPI data will already be in hand. That is the window.