S&P 500 futures slipped on Wednesday as a sharp selloff in semiconductor stocks collided with Middle East tensions that sent oil prices soaring, creating a two-front headwind for the market. The chip sector decline followed disappointing investor reactions to Samsung Electronics’ record earnings, while geopolitical escalation in the Strait of Hormuz rattled energy markets and threatened to stoke inflation concerns.
Memory chip giant Samsung reported a 19-fold surge in quarterly operating profit, yet its stock tumbled as much as 10% in Asia after the results failed to satisfy Wall Street’s sky-high expectations for the AI boom. The selloff spread globally, dragging down the PHLX Semiconductor Index (.SOX) by 4.65%, reducing its 2026 gain to about 74%, according to Reuters. Micron Technology dropped 4.7% and SanDisk fell 7.3% as investors rotated out of the chip stocks that have powered much of this year’s rally on artificial intelligence enthusiasm.
Analysts attributed the sector’s weakness to mounting doubts about whether the massive capital spending on AI infrastructure can justify current valuations. “The story of today is the story of the last few weeks, and that’s rotation after the blistering run in the AI buildout, semis and memory. Expectations have gotten to be almost impossible to beat for these companies,” Zachary Hill, head of portfolio management at Horizon Investments, told Reuters. Adding to the pressure, Reuters reported that Chinese startup DeepSeek is developing its own AI chip, a move that could reduce dependence on Nvidia and other chipmakers.
The geopolitical backdrop intensified selling pressure when the U.S. Treasury revoked a license authorizing Iranian oil sales on July 7, 2026, following reports of strikes on three commercial vessels near the Strait of Hormuz. The move cut short a 60-day waiver that had temporarily eased decades-old sanctions as part of a broader memorandum of understanding aimed at ending the war with Iran. International Brent crude oil jumped nearly 5.5% to more than $75 per barrel following the revocation, according to The Hill.
The escalation in the Middle East tested a fragile truce between Washington and Tehran. A U.S. official told The Hill that the memorandum of understanding was “entirely performance-based,” and that “Iran will only reap benefits if they exhibit good behavior.” Iran’s strikes on the tankers near the strategically vital Strait of Hormuz, which carries roughly 20% of global oil and gas exports, prompted U.S. Central Command to launch retaliatory strikes on Tuesday, further straining the agreement.
Market Impact and Broader Context
The combination of chip weakness and oil volatility underscored the market’s vulnerability to two separate shocks simultaneously. On Tuesday, the S&P 500 declined 0.45% to 7,503.85 points, the Nasdaq fell 1.16% to 25,818.69 points, and the Dow Jones Industrial Average slipped 0.25% to 52,925.15 points, according to Reuters. The broader selloff in chip stocks marked the latest bout of volatility among memory chipmakers and AI-related stocks as investors grapple with the sustainability of the AI-driven rally that has dominated markets for much of 2026.
Higher oil prices pose a secondary risk to equity markets by raising inflation concerns and potentially pressuring consumer spending and corporate margins. The Treasury Department’s decision to wind down authorized transactions under the previous waiver by July 17 signals a hardening stance on Iran policy, a shift that could keep energy markets volatile as geopolitical risks remain elevated in the region.
Sources
- Reuters — Samsung earnings report, chip index decline, market closing data, analyst commentary from Horizon Investments
- The Hill — Oil price movements, U.S. sanctions waiver revocation, Iranian oil license details
- CNBC — Chip stock selloff following Samsung results
