Crude oil fell 11 percent across three consecutive sessions into August 5, sliding from $84.67 to $75.22 as reports circulated that Iran and Oman had reached a preliminary agreement on managing traffic through the Strait of Hormuz. On August 6, it reversed 3.7 percent in a single session, closing at $77.99 after a reported explosion near a transiting tanker and a Houthi attack claim in the Red Sea.
WTI has now moved more than three percent in a single session on nine of the past 23 trading days. On four of those occasions, the direction flipped within 48 hours of the prior move. The oil market has not been pricing a gradual convergence toward resolution. It has been pricing whichever headline arrived most recently, discarded within days for the next one.
The Availability Heuristic Has a Textbook Case Running in Real Time
Amos Tversky and Daniel Kahneman described the availability heuristic in 1973: people judge the probability of an event by how easily examples come to mind, not by its actual base rate. A headline that is vivid, recent, and easy to recall gets weighted far more heavily than the slower, harder to picture process of a war actually ending.
The three session slide into August 5 is the heuristic in action. A reported agreement between two governments, still under review by Iran's parliament and still requiring the sign off of an Acting Supreme Leader who has been in hiding since February and whose communication channels are, by his own president's description, difficult, was priced as though the resolution were close to final. The draft terms reported this week would bar US and Israeli linked vessels and impose fees of up to seven percent of cargo value, conditions a former State Department official called unlikely to be acceptable in Washington. None of that complexity showed up in the price move. The headline that a deal was advancing did.
The Reversal Carried Less Weight Than the Decline That Preceded It
The August 6 reversal is the more interesting half of the pattern. A reported explosion near a tanker transiting the strait and a Houthi attack claim against a Saudi vessel are, on their own terms, at least as significant to the probability of continued disruption as a draft agreement still awaiting the approval of an incapacitated leadership structure. Yet the three day decline that preceded it received far more sustained market attention than the single session reversal that followed. Recency does not mean the most recent fact wins outright. It means the most recently reinforced narrative wins, and by August 5 the market had spent three straight sessions reinforcing the deal narrative.
Gold's move over the same window tells a related story. Bullion climbed toward $4,300 an ounce through the week, driven partly by the same Hormuz de-escalation narrative and partly by softer US labour data that reduced the odds of a near term Federal Reserve rate hike. Two distinct catalysts, one direction, and a market inclined to read the combination as confirmation rather than coincidence.
What the Research Says About Correcting for This
Kahneman's later work with the concept of base rate neglect extends the 1973 finding: even when people are given explicit statistical information about how often an outcome actually occurs, a vivid recent example will still dominate the judgment. The correction is not to ignore the newest headline. It is to hold it against the structural obstacles that have not changed, in this case a wartime leadership structure that cannot easily ratify an agreement and a proposed ban on US vessel access that a sitting US administration facing midterm elections has strong incentive to reject.
The oil market's 23 session pattern shows what happens when that structural check does not happen consistently. Each new headline resets the forecast rather than updating it.
The August 4 to 5 decline followed reports that Iran and Oman had reached a preliminary agreement on Strait of Hormuz shipping management. The August 6 reversal followed a reported explosion near a transiting tanker and a Houthi attack claim in the Red Sea.