The chain of consequence that began February 28, when U.S. and Israeli strikes on Iran triggered the de facto closure of the Strait of Hormuz, added another link on June 3. Iran struck Kuwait International Airport with drones and missiles, killing one person and injuring 63. The IRGC claimed simultaneous strikes on U.S. military installations in Bahrain. Iran's state-linked Tasnim news agency reported the suspension of ceasefire negotiations. President Trump, speaking separately, said his naval blockade of Iranian ports could last until Labor Day.
For a Canadian financial advisor trying to assess what this means for client portfolios, the operative question is not whether the news is alarming, it is whether the specific mechanism connecting the conflict to Canadian energy economics has changed. The answer as of June 4 is: not materially, but the tail risk has thickened.
The Hormuz Mechanism and Where It Stands
The Strait of Hormuz is a 21-mile-wide passage through which approximately 20% of global seaborne oil trade passed before the conflict began February 28. The EIA assessed in its May 12 Short-Term Energy Outlook that Iraq, Saudi Arabia, Kuwait, the UAE, Qatar, and Bahrain collectively shut in 10.5 million barrels per day of production in April as a direct result of the strait's closure. That supply disruption drove Brent crude from $61 at the start of 2026 to a peak of $138 on April 7, before easing back as a U.S. naval campaign through April and May cleared Iranian assets from the shipping lanes and partial commercial traffic resumed in late May and early June.
The May STEO assumed the strait would remain effectively closed until late May, with shipping beginning to pick up in June but not returning to pre-conflict volumes until later in 2026. That assumption appears broadly accurate as of early June. WTI has been trading in the $93-96 range, well below the April peak but more than 50% above the pre-conflict level. The EIA projects global oil inventory draws of 8.5 million barrels per day through Q2 2026, a depletion rate that maintains upward price pressure even as partial flows resume.
The chart above shows WTI crude's price path from January 1, 2026 through June 3, annotated against the key conflict and ceasefire developments that marked structural inflection points in the supply disruption narrative.
WTI crude's trajectory from $61 pre-conflict to a $138 peak on April 7, followed by gradual retreat to the $94 range as partial Hormuz traffic resumed in June. The partial recovery band reflects the U.S. naval campaign's effect on reopening commercial passages, not a resolution of the underlying supply disruption. The EIA projects inventory draws of 8.5 million barrels per day through Q2 2026.
The Kuwait Attack: What It Changes and What It Does Not
The June 3 attack on Kuwait International Airport is the most significant single escalation since the April ceasefire framework was announced. Iran struck civilian infrastructure in a Gulf Cooperation Council state that has been broadly neutral in the conflict, killing one person and injuring 63. Kuwait expelled Iranian diplomats in response. The IRGC simultaneously targeted U.S. facilities in Bahrain. Israel and Lebanon separately agreed to a ceasefire framework on June 3, contingent on Hezbollah withdrawal from southern Lebanon, a condition Iran has publicly opposed.
The strategic logic from Tehran's perspective is legible. Iran's chief negotiator had warned that talks would be halted if Israeli attacks on Lebanon continued. The Kuwait strike is simultaneously a pressure tactic on the U.S.-mediated process and a demonstration that Iran retains offensive capability despite the U.S. naval campaign. The attack on a non-combatant Gulf state escalates the regional dimension of the conflict in a way that complicates both Trump's domestic political position and the Gulf states' calculations about their own exposure.
For the specific question of Hormuz and Canadian energy economics, the June 3 events introduce a risk scenario but do not constitute a new supply shock. The U.S. Navy's operational control over commercial shipping lanes in the strait has been established through the April-May campaign. Iranian interdiction capability has been materially degraded. The Kuwait attack targeted an airport and a naval base, not shipping infrastructure. The market's immediate read, with WTI pulling back slightly to $94 rather than spiking on the news, reflects a judgment that the attacks are a negotiating signal rather than a structural supply action.
The Canadian Portfolio Implication: Sustained Floor, Not New Ceiling
The scenario that matters for Canadian energy equity is the one that sustains WTI in the $90-plus range through the summer months. That scenario does not require resolution of the Iran conflict. It requires only that the Hormuz partial closure and the resulting inventory depletion continue at a pace that prevents a rapid price normalization. The EIA's projection through Q2 and Q3 2026, and Goldman Sachs' May 31 note projecting WTI at $90 or above into year-end even if the strait fully reopens, both point to the same conclusion: the supply deficit already created is large enough to sustain elevated prices independently of whether the shooting continues.
The tail risk that the Kuwait attack introduces is a return to full Hormuz interdiction. If Iran chooses to re-engage its naval blocking capability in the strait, the partial traffic that has resumed since late May would stop, and the supply shock would deepen rather than gradually resolve. That is the scenario the market is currently not pricing as the base case but is now pricing with greater probability than it was 48 hours ago. The TSX energy sector's 1.19% gain on June 3, against the broader composite's 1.05% decline, reflects the market's reading that the tail risk is oil-positive even as general equity risk is elevated.