The headline numbers suggest investors have shrugged off the most serious geopolitical crisis since Russia's invasion of Ukraine. Since hostilities between the United States and Iran began, the world's biggest listed companies have added roughly $5.4 trillion in market capitalisation. That figure, however, is a statistical illusion—one that obscures the genuine economic damage radiating outward from the Strait of Hormuz.
Nearly all of those gains belong to a single sector: semiconductors. Nvidia, TSMC, ASML, and their peers have continued their multi-year tear, propelled by insatiable demand for AI training chips and the infrastructure to run them. Remove the chip complex from the calculation and the aggregate picture flips to a loss. Energy-intensive manufacturers, airlines, logistics firms, and consumer-facing companies are bleeding value even as the Nasdaq composite flirts with fresh highs.
The great divergence
What we are witnessing is a market bifurcation of historic proportions. On one side sit the AI beneficiaries, whose revenue growth and margin expansion have little to do with oil prices or shipping-lane closures. On the other sit businesses whose cost structures are acutely sensitive to both. Fertiliser producers, steel mills, and chemical plants are absorbing energy-price shocks that have not been fully passed through to consumers. Airlines face jet-fuel costs that have nearly doubled since the Strait of Hormuz was effectively closed to tanker traffic. Retailers dependent on Asian imports are watching freight rates climb week after week.
The divergence is visible in sector-level data but almost invisible in the headline indices, which are market-cap weighted and therefore dominated by the very firms that have escaped the war's gravitational pull.
Why it matters beyond Wall Street
The distortion has policy implications. Central bankers watching equity markets for signs of financial stress may underestimate the strain on the real economy. Corporate treasurers at non-tech firms face tightening credit conditions even as their tech counterparts sit on record cash piles. And retail investors who own broad index funds may believe their portfolios are resilient when, in fact, a handful of chip stocks are doing all the heavy lifting.
If AI sentiment were to cool—whether from a demand plateau, export-control escalation, or simply a valuation reset—the mask would slip, revealing an equity market that has been quietly bleeding from the war all along.
Our take
Markets love a simple narrative, and "AI conquers all" is seductive. But the current rally is less a sign of economic health than a testament to how thoroughly a single technological theme can dominate price-weighted indices. Investors should look beneath the hood. The war in the Gulf is exacting a toll; it is simply being hidden in plain sight by the most powerful hype cycle of the decade.
