Energy and technology remain the dominant engines of performance for the US stock market this year. That’s another way of saying that the Iran war and AI are the primary factors lifting broad measures of American equities in 2026.
The narrow drivers of the market’s performance this year are both good news and bad. They are good in the sense that the reasons for the upside momentum in these sizzling sectors are intact. They are bad because even a modest shift in the underlying drivers could have substantial repercussions for broad market indices.
Consider how the stock market’s performance stacks up so far in 2026 through a sector prism, based on a set of ETFs. Soaring energy shares () and surging tech stocks () are the upside outliers by a wide margin. As a result, the SPDR S&P 500 ETF () is outperforming most of its sector components with a 12.9% year-to-date return.
Energy stocks have been strong all year, and continue to find support in the Iran conflict that’s flared up again lately. After the Islamic Revolutionary Guard Corps attacked two American warships in the Persian Gulf, the US retaliated and struck five Iranian tankers. The news pushed the price of crude oil above $100 a barrel on Wednesday for the first time since July, based on , the international oil benchmark.
Energy exports through the Strait of Hormuz have remained at a fraction of pre-war traffic, and the latest escalation of fighting in the region will likely keep shipping flows low. A new forecast from Goldman Sachs advises that intensification of the conflict could raise Brent oil above $120 a barrel.
“The main forces driving prices higher remain geopolitical conflict in the Middle East, both the U.S.-Iran conflict in the Persian Gulf and the confrontation between Saudi Arabia and the Houthis in Yemen, as well as the Russia-Ukraine war,” Eurasia Group analysts wrote in a report. “A shortage of global refining capacity has added further upward pressure, alongside sustained demand for refined products.”
Meanwhile, tech stocks continue to benefit from “AI-driven earnings durability,” in the words of Venu Krishna, head of equity strategy at Barclays. A “standout earnings season” led by technology prompted the investment bank to raise its year-end S&P 500 target to 7,950 from 7,800, a forecast that, if correct, equates to a 3.6% rally by December 31 from yesterday’s close.
The latest earnings data highlights the outsized influence of energy (followed by tech) for animating the bullish tone. “At the sector level, four of the eleven sectors witnessed an increase in their bottom-up EPS estimate for Q3 2026 from June 30 to August 31, led by the Energy (+11.8%) sector,” writes John Butters at FactSet. “On the other hand, seven sectors recorded a decrease in their bottom-up EPS estimate for Q3 2026 during this period, led by the Materials (-9.1%) sector.”
AI optimism and the risk of a wider Iran conflict are keeping technology and energy stocks humming. But the market’s dependence on these powerful themes also creates vulnerability. If AI adoption falls short of lofty expectations or tensions in the Middle East ease, the pillars supporting the rally could weaken. For now, investors see both risks as unlikely in the near term. Even so, with gains increasingly concentrated in just two narratives, any meaningful shift in either could have an outsized effect on broad equity benchmarks.