Iran war’s big winners: Wall Street, weapons firms, AI and green energy

The ongoing US-Israel war on Iran has disrupted global trade and weighed on economic growth, but some sectors are benefiting from heightened volatility and shifting policy priorities.

The International Monetary Fund has cut its 2026 global growth forecast to 3.1%, citing supply disruptions linked in part to the shutdown of the Strait of Hormuz and damage to Gulf energy infrastructure, says Al Jazeera.

Here are five sectors that analysts say are seeing gains:

Why are Wall Street banks benefiting?

Major US investment banks have reported higher profits as market volatility drives trading activity and portfolio shifts.

Morgan Stanley posted a 29% rise in profit to $5.57 billion, while Goldman Sachs reported a 19% increase to $5.63 billion. JPMorgan Chase recorded a 13% gain to $16.49 billion.

Banks cited "robust client engagement" to explain the results. Analysts say frequent repositioning by investors—sometimes referred to by traders as the "TACO trade," short for "Trump Always Chickens Out"—has boosted commissions and trading revenues.

"Clients want to reposition, so they trade frequently. Spreads tend to increase, which increases the profitability for trade intermediaries like banks," said Sean Dunlap, director of equity research at Morningstar Research Services.

What is driving growth in prediction markets?

Crypto-based prediction platforms are drawing increased attention as users speculate on geopolitical outcomes.

Polymarket has expanded rapidly, revising its fee structure in March 2026 and generating more than $21 million in fees in early April alone.

Regulators are examining the sector over concerns about potential insider trading linked to event-based betting, while data suggests the majority of gains accrue to a small share of users.

How is the defense sector performing?

Global military spending has risen amid conflicts in Iran, Ukraine and Gaza, supporting defense contractors.

Members of NATO have pledged to increase defense spending to 5% of GDP by 2035, particularly in Europe.

The MSCI World Aerospace and Defense Index has delivered net returns of about 32% year-on-year, outperforming broader equity benchmarks.

Why is artificial intelligence holding up?

The AI sector has remained resilient despite wider economic uncertainty, supported by strong demand for computing infrastructure.

Taiwan Semiconductor Manufacturing Company reported first-quarter net income of $18.1 billion, up 58% from a year earlier, reflecting continued demand for advanced semiconductors.

Companies such as OpenAI and Anthropic are also pursuing plans to go public, signaling investor interest in the sector.

"Despite the shocks from the Iran war, we're still seeing resilience in a lot of sectors like artificial intelligence and renewable energy," said Nick Marro, lead analyst for global trade at the Economist Intelligence Unit.

How is the war affecting renewable energy?

Energy supply disruptions have accelerated investment in alternatives to fossil fuels.

Countries in Asia, many of which rely heavily on shipments through the Strait of Hormuz, are increasing support for solar, wind and nuclear power as part of energy security strategies.

"Boosted" renewable energy "given the urgency to switch away from fossil fuels and diversify towards renewable sources," said Nick Marro.

A report from the International Energy Agency said: "150 countries have active policies to advance renewable and nuclear deployment, 130 have energy efficiency and electrification policies, and 32 have policies to incentivise supply chain resilience and diversification across critical minerals and clean energy technologies."

The S&P Global Clean Energy Transition Index has risen nearly 71% year-on-year, reflecting increased policy backing and investor demand.

What is the broader outlook?

While these sectors are benefiting, economists warn that prolonged conflict and supply disruptions could continue to weigh on global growth, trade and energy markets, underscoring uneven economic effects from the war.