Key Highlights

  • ExxonMobil and Chevron hit all-time equity highs as Strait of Hormuz disruptions sent oil gyrating around USD 100 per barrel, triggering the largest supply shock in recorded history.
  • American Airlines shares fell 20% since February 27 while Delta rose 3%, exposing how operational structure, not sector membership, determines airline earnings resilience.
  • LyondellBasell, Dow, and CF Industries surged sharply as cheap North American natural gas became an unexpected competitive weapon against supply-disrupted global rivals.
  • BYD exports climbed 65% in March and CATL gained nearly 20%, with combined clean-energy equity gains exceeding USD 70 billion since the conflict began.
  • Campbell's and General Mills fell more than 20% as investors concluded that packaged-food companies have already exhausted consumer tolerance after the 2022 Ukraine inflation cycle.

Two Shocks, One Bill

Rising energy costs hit corporate America in sequence, not simultaneously. The first blow lands on the cost line: fuel, logistics, and energy-intensive production become more expensive before management teams have time to adjust. The second blow lands on the revenue line: households paying more at the pump reduce spending on everything else.

At USD 4 per gallon, US petrol prices have already crossed that threshold, up from USD 3 at end-February. For the average American household, which owns at least one car and often two, that 33% increase in five weeks redirects more than USD 1,000 per year away from restaurants, apparel, and leisure. The companies serving those spending categories are already absorbing the consequences.

The conflict that triggered this repricing began February 28, when US and Israeli forces struck Iran, killing Supreme Leader Ali Khamenei. Iran's subsequent closure of the Strait of Hormuz removed approximately 20% of global oil supply from circulation. Crude Oil, which opened 2026 near USD 60 per barrel, briefly topped USD 114 before settling near USD 110 as of April 5. The equity market is now sorting which companies this benefits and which it damages. Several answers have defied conventional expectations.

The Clear Winners: Energy and Defense

The oil-and-gas sector's gains follow straightforward economic logic. ExxonMobil, Chevron, and a range of other US producers, refiners, and exporters surged to all-time highs as fears over fuel and power costs intensified. Listed oil-and-gas companies have rallied an average of over 8% since February 27. The Energy Select Sector SPDR Fund has gained close to 25% year-to-date.

The earnings impact is material. Analysts covering Chevron revised Q1 per-share earnings projections upward by an average of approximately 40%. ExxonMobil, producing close to five million barrels per day, could see additional revenues of approximately USD 5.1 billion in March alone at prevailing price levels. Chevron alone could see an estimated USD 1.7 billion earnings boost in Q1 2026, supporting accelerated stock buybacks.

Defense stocks delivered an expected initial surge. Lockheed Martin hit a new all-time high at USD 676.70 on the first session following the strikes. Northrop Grumman gained 6%, RTX rose nearly 5%, and Palantir Technologies climbed almost 6% as its AI-driven intelligence platforms drew renewed institutional demand. That momentum has since moderated. Earnings growth expectations for the five major US defense primes, including Lockheed Martin, Northrop Grumman, General Dynamics, L3Harris, and RTX, slipped from approximately 15% at the start of the year to around 12% by end of March, with analysts noting the conflict would need to expand materially for estimates to move meaningfully higher.

The Counterintuitive Winners: Chemicals and Fertilisers

The most analytically interesting gains belong to businesses that conventional logic would place on the wrong side of an energy shock.

Petrochemical producers use hydrocarbons as both energy inputs and raw feedstock. When oil and gas prices rise globally, their costs should rise with them. That holds for European and Asian producers. It does not hold for US manufacturers who draw feedstock from North American natural gas, which has remained substantially cheaper than gas elsewhere precisely because Gulf supply disruptions have tightened the global market.

KeyBanc Capital Markets upgraded Dow and LyondellBasell following the conflict's onset, noting the disruption could reduce global supply and widen US producers' margins as their cost advantages over foreign competitors expand. LyondellBasell has surged approximately 30% since the conflict began. Dow gained 75% year-to-date through early April, with its low-cost US Gulf Coast assets benefiting directly from petrochemical supply disruptions that boosted margins and pricing power.

CF Industries occupies a structurally similar position. The fertiliser producer uses North American natural gas as the primary input for ammonia synthesis. The Hormuz disruption has crimped natural gas flows from the Gulf region, directly squeezing ammonia and fertiliser production capacity worldwide, leaving CF Industries with significant pricing power relative to Gulf and European competitors facing sharply higher input costs.

The Airlines: Operational Structure Over Sector

No sector illustrates the importance of corporate architecture over sector identity more starkly than aviation. Delta Air Lines has risen 3% since February 27. American Airlines has fallen 20%. United Airlines is down 13%. The divergence reflects operational decisions made years before the conflict began.

Delta owns the Trainer Refinery in Pennsylvania, which supplies a significant portion of its domestic fuel needs. While this does not insulate the carrier from rising crude costs, it protects against the widening crack spread between crude and refined jet fuel. Delta management nonetheless flagged a USD 400 million hit to fuel expenses in Q1 2026 alone.

American and United carry no equivalent structural buffer. US carriers largely abandoned fuel hedging over the past two decades, leaving those without refining assets fully exposed to jet fuel costs that have more than doubled since hostilities began. The sector's Q1 earnings cycle, opening with Delta's report on April 8, will quantify the full damage across individual operators. The equity divergence already visible suggests the market has formed a firm view of which management teams planned for a scenario like this.

The Discretionary Split

Consumer-facing businesses are dividing along lines that reflect the mechanics of household budget pressure rather than standard risk categories.

Chipotle, Nike, and Williams Sonoma have each lost between 12% and 15% of their equity value since end-February. These are businesses whose revenue depends on consumers choosing to spend money they are actively redirecting elsewhere. The connection to higher petrol prices is direct.

The more revealing losses belong to packaged-food producers. Campbell's and General Mills have both fallen more than 20%. The investor logic is specific: both companies pushed through significant price increases during the 2022 Ukraine-driven inflation cycle. Consumers responded by switching to private-label alternatives, a behavioural shift that proved durable. With a second inflationary episode now arriving, markets are concluding these companies lack the brand pricing power to pass through cost increases a second time in four years. The 2022 playbook is unavailable.

Grocery retailers including Costco, Kroger, and Walmart have seen broadly flat share prices. Their private-label ranges benefit from exactly the consumer switching behaviour that is compressing branded manufacturers' margins. Burlington Coat Factory is up approximately 7%, with investors anticipating accelerating value-seeking behaviour as household budgets tighten further.

The Long Signal: EVs and the Structural Bet

The equity move carrying the most significant long-term implications sits not in oil, defense, or chemicals, but in electric vehicles and battery technology.

CATL gained nearly 20% in March, BYD jumped 22%, and solar energy developer Sungrow rose approximately 19%. The combined market valuations of BYD, CATL, and Sungrow surged by USD 70 billion since the conflict began, a figure that exceeded the absolute equity gains recorded by most of America's oil majors over the same period.

Consumer behaviour is reinforcing the equity signal. BYD's exports and overseas sales climbed 65% in March, the highest in three months, as surging oil prices drove demand for electric cars across Asian markets. Ford and General Motors face the inverse dynamic: near-term demand pressure from compressed household budgets, compounded by the longer-range question of whether this oil shock accelerates permanently the consumer transition away from petrol-powered vehicles. The 1970s oil shocks restructured the US automotive market over a decade, shifting share toward fuel-efficient imports from which Detroit never fully recovered. The mechanism then was the same as now: sustained fuel cost increases changed what consumers valued in a car.

Baker Hughes, the oilfield services group, offers a cautionary read on how durable the energy sector's gains will prove. After an initial decline on Middle East project exposure concerns, its shares are trading just below pre-conflict levels, suggesting investors doubt that prices near USD 100 per barrel will trigger the kind of sustained upstream capital expenditure cycle that would benefit services companies.

The Structural Lesson

The equity market's response to the first month of the Iran conflict has produced a coherent picture. Businesses with structural input cost advantages rooted in North American resource access, operational hedges embedded in their asset base, or positioning in the EV supply chain are outperforming. Businesses exposed to unhedged fuel cost pass-through, discretionary consumer spending compression, or a second inflation cycle after having already depleted their pricing power in 2022, are suffering.

Much of the oil majors' equity premium is fragile. A meaningful portion of ExxonMobil and Chevron's 2026 gains reflect a war premium that markets have already partially repriced once, when brief ceasefire signals pushed WTI crude briefly back below USD 100 per barrel. A genuine agreement to reopen the Strait would remove it quickly.

What no agreement can reverse is the structural shift in consumer preference and corporate competitive positioning that a sustained oil shock sets in motion. The companies that understand the difference between a cyclical pricing event and a durable realignment of demand will be better positioned than those managing purely for the duration of the headline.