U.S. equities came under pressure on Tuesday as a broad selloff in semiconductor and artificial intelligence-related stocks spread across global markets. The S&P 500 declined 1.3%, while the Nasdaq Composite dropped 2%, reflecting growing investor caution toward one of the market’s strongest-performing sectors. The weakness followed a sharp overnight decline in Asian technology shares, particularly in South Korea and Japan, raising questions about whether the AI-driven rally that has dominated global markets is entering a period of consolidation.

Global Semiconductor Stocks Lead Market Decline

The selloff was most severe among semiconductor companies, with memory-chip manufacturers at the center of the decline. Micron Technology fell 11%, while Sandisk lost 12% and Seagate Technology dropped more than 6%. Other major chipmakers also faced heavy pressure, with Advanced Micro Devices falling 5%, Qualcomm declining 8%, and Intel retreating 4%.

The weakness was not limited to U.S. markets. South Korea’s SK Hynix, one of the world’s largest memory chip producers and a major beneficiary of AI demand, plunged more than 12%. The broader Kospi Index declined nearly 10%, ending a remarkable rally that had pushed the benchmark up approximately 95% this year. Japan’s Nikkei 225 also fell 3.55%, breaking an eight-session winning streak.

The widespread nature of the decline suggests investors are reassessing valuations and reducing exposure to some of the market’s most crowded positions after months of exceptional gains.

AI Leaders Face Profit-Taking Pressure

Technology-focused exchange-traded funds reflected the magnitude of the retreat. The VanEck Semiconductor ETF (SMH) dropped 6%, while the Technology Select Sector SPDR Fund (XLK) fell 3%. These moves underscore how heavily investor sentiment toward artificial intelligence has influenced broader market performance throughout the year.

Many of the companies experiencing the sharpest declines have been among the biggest winners of the AI revolution. Massive capital spending by hyperscale cloud providers, expanding demand for advanced semiconductors, and enthusiasm surrounding generative AI technologies have driven extraordinary gains across the sector.

However, periods of strong momentum often attract significant speculative activity. As valuations rise and investor positioning becomes increasingly concentrated, even minor shifts in sentiment can trigger substantial short-term corrections.

Broader Market Resilience Remains Intact

Despite the weakness in technology, several defensive sectors helped limit broader market losses. Companies such as Walmart, Procter & Gamble, Johnson & Johnson, Merck, and Sherwin-Williams posted gains as investors rotated toward more stable earnings profiles. IBM also outperformed after receiving an analyst upgrade, highlighting continued interest in selective technology opportunities outside the semiconductor space.

Meanwhile, SpaceX advanced 6%, demonstrating that investor appetite for growth stories remains intact despite broader volatility. The divergence suggests that the current selloff may be more closely tied to positioning and valuation concerns than a fundamental deterioration in growth expectations.

Looking ahead, investors will closely monitor upcoming earnings reports from major semiconductor companies, capital expenditure trends among hyperscalers, and broader economic data that could influence interest-rate expectations. While short-term volatility may persist, many market participants continue to view artificial intelligence as one of the most powerful long-term investment themes. If earnings growth remains strong and AI infrastructure spending continues at its current pace, the current correction could ultimately be remembered as a healthy reset rather than the end of the sector’s leadership. For now, however, markets are reminding investors that even the strongest trends can experience periods of sharp turbulence.