WTI crude closed at $102.48 a barrel on September 10, up 25 per cent from $81.95 a month earlier, as the tanker war between the United States and Iran in the Strait of Hormuz has intensified through late August and early September. The move has been driven less by a single headline than by a compounding series of strikes, retaliations and shipping disruptions that has taken more than a month to fully show up in the price.
The Chain from Tehran to a TSX Energy Portfolio
The mechanism is direct. Washington began a naval blockade of Iranian ports in April, and on September 2 U.S. forces struck three Iranian tankers directly, alleging the vessels financed the Islamic Revolutionary Guard Corps and its regional proxies. Iran responded with ballistic missiles aimed at U.S. aircraft carriers and strikes on tankers it accused of using unauthorized routes to break the blockade. Shipping analytics firm Kpler has tracked the result: daily transits through Hormuz have fallen to a ten day average of 13 vessels, down from roughly 20 a day before the conflict began, a chokepoint that normally carries close to a fifth of global oil supply.
That mechanism reaches a Canadian portfolio through the same channel every Hormuz disruption uses: higher crude flows directly into Canadian energy equity valuations, into the price at the pump that shows up in the next inflation print, and into the Canadian dollar, which has historically firmed on higher oil even as it weakens against a stronger U.S. dollar driven by the same geopolitical uncertainty.
The climb from $81.95 to $102.48 has not moved in a straight line, tracing the escalation from the first direct U.S. strikes on Iranian tankers through to the sharpest single week of the conflict so far.
The steepest single day move came September 9 to 10, after Iranian strikes on tankers using routes around the U.S. blockade. Pre-war WTI traded near $70 in early 2026. Source: Investing.com.
Base Case Versus Tail Risk: What the Data Actually Shows
The two sides of the conflict are not even describing the same strait. U.S. Treasury Secretary Scott Bessent has said roughly 17 million barrels a day have continued moving through Hormuz, a figure meant to reassure markets that the blockade has not meaningfully closed the chokepoint. Kpler's tracked vessel data does not support that number: a ten day average of 13 transits a day is consistent with a flow well below the pre-war level of roughly 20 million barrels a day, not close to it.
The base case for HDQ remains a sustained elevated-price regime rather than a full closure of the strait. A complete shutdown would remove close to a fifth of global oil supply overnight and has no clean historical precedent even during past Gulf conflicts. The tail risk, not the base case, is a scenario where Iran succeeds in closing the strait outright rather than degrading its traffic. U.S. diesel prices at a record $5.85 a gallon and American public support for the war at just 31 per cent, according to polling cited by Al Jazeera, both argue against Washington tolerating an open ended escalation heading into a reelection cycle.
The Canadian Energy Trade Nobody Is Pricing Correctly Yet
Canadian energy producers benefit directly from a higher crude price, and the TSX energy sub-index has been among the strongest performing groups on the index through the escalation. The offset that has not fully worked through yet is on the consumer side: higher crude flows into Canadian headline inflation through fuel costs, which the Bank of Canada has already cited as a factor in its September 2 rate decision, complicating the same central bank calculus a higher energy sector is otherwise cheering.
The clean read for a Canadian portfolio is that this is a sector rotation story with a monetary policy sting attached, not a one directional trade. Energy sector strength and consumer inflation pressure are the same event, arriving through two different transmission channels at two different speeds.