Gold closed at $4,038.50 on June 30, down 16 percent from its April 16 peak of $4,808.30. Over ten weeks, the price that had served as the market's clearest fear gauge for the Strait of Hormuz crisis steadily deflated. Then, hours after a week long de-escalation arrangement between the United States and Iran expired Monday night, Iran's Islamic Revolutionary Guard Corps fired on two commercial vessels transiting the strait, according to Axios and CNN, both citing unnamed US officials.
A tanker caught fire roughly eight nautical miles off Limah, Oman, after being struck by a projectile, the United Kingdom Maritime Trade Operations agency reported. A second vessel, believed to be a Saudi flagged crude carrier, suffered significant damage in a separate strike. No casualties were reported in either incident.
Why the Gold Chart Is the Behavioural Story
The decline in gold from April to June was not a random drift. It was the market's collective judgment, expressed through the safest of safe haven assets, that the Hormuz crisis was resolving. The June 17 memorandum of understanding between Washington and Tehran gave that judgment a specific anchor point. Vessel traffic data supported it: 108 ships crossed the strait over the weekend before the attack, according to the tracking firm MarineTraffic, the highest volume recorded since the war began on February 28.
This is precisely the setup that behavioural finance describes as recency bias, the tendency to give disproportionate weight to the most recent trend when forecasting what happens next. Amos Tversky and Daniel Kahneman's original work on the availability heuristic explains the mechanism: events that come to mind easily, including a string of calm weeks, feel more representative of the true state of the world than they are. A client who watched gold fall for ten straight weeks did not learn that the risk was gone. They learned that recent history was quiet, and their brain generalised from that.
The Base Rate the Recent Calm Obscured
The base rate here was never zero. The United Kingdom Maritime Trade Operations agency itself warned as recently as Sunday that risk in the strait remained lower than the pre-memorandum period but that "Iranian intent and capability to conduct intentional hostile action remain," and that the environment continued to warrant heightened vigilance despite the absence of recent escalation. That warning was available and specific. It was also easy to discount against ten weeks of falling gold prices and rising vessel counts.
Indirect talks between the US and Iran in Doha last week ended without progress on the strait's status, and Iran's Assembly of Experts had publicly instructed its own negotiators over the weekend to hold firm to red lines set by the new Supreme Leader. Neither development moved gold or the TSX materially. A missile did.
Gold tracked the market's fear of a prolonged Hormuz disruption almost tick for tick from the war's opening days through this week, and the ten week slide from its April peak shows how far that fear had faded before Monday's attack.
Gold's ten week decline from its April 16 peak reflected the market pricing a durable resolution to the Hormuz crisis following the June 17 memorandum of understanding. The gap between the April peak and current levels remains wide even after Monday's rebound.
What Recency Bias Costs an Investor in Practice
The behavioural finance literature on this pattern is specific about the cost. Investors who extrapolate a recent trend tend to under-hedge tail risk precisely when the cost of hedging is cheapest, because calm markets price protection cheaply. They then pay full price for protection after the shock has already occurred, when volatility and hedging costs have both repriced higher. The client who found gold's decline reassuring in June is the same client most likely to call in a state of alarm this week, at the exact moment when acting on that alarm is least useful.
None of this means the attack itself resolves toward the worst case. The memorandum of understanding survived a similarly serious violation in late June, when attacks across the Persian Gulf over a weekend were followed by both sides sending delegations to Doha within 48 hours. The pattern so far has been violation followed by renewed diplomacy, not renewed war. But a pattern of two data points is not a base rate either, and treating it as one would repeat the same error in the opposite direction.