U.S. equities extended their decline on Tuesday as investors continued to reduce exposure to technology and artificial intelligence-linked stocks, triggering a broad-based sell-off that spread from mega-cap technology names to semiconductor and memory-chip companies. The weakness also reverberated through Asian markets, underscoring the global importance of the AI-driven rally that has supported equities over recent months.

The technology-heavy Nasdaq Composite led losses, falling 2.2%, while the S&P 500 declined 1.4%. The Dow Jones Industrial Average proved more resilient, slipping just 0.1% as investors rotated toward defensive and non-technology sectors.

The latest wave of selling followed heavy losses earlier in the week among major technology companies. What initially appeared to be profit-taking in select mega-cap names evolved into a broader reassessment of valuations across the semiconductor and memory industries, sectors that had been among the strongest beneficiaries of the artificial intelligence boom.

Memory-chip stocks experienced particularly severe pressure. SanDisk, previously the best-performing constituent of the S&P 500 this year, plunged 14%, making it the weakest performer in the index during the session. Western Digital fell 8%, while Micron Technology dropped approximately 13%, highlighting a sharp shift in investor sentiment toward high-growth technology assets.

The sell-off extended beyond U.S. markets. South Korea's benchmark Kospi index fell 10% as investors aggressively reduced exposure to semiconductor giants, including Samsung Electronics and SK Hynix, reflecting concerns that the recent AI-fueled rally may have become overstretched.

Among major technology companies, performance remained mixed. Nvidia lost 4%, Tesla declined 6%, and Alphabet continued its downward trajectory. Microsoft was one of the few bright spots, rising 2% and providing limited support to the broader technology sector.

SpaceX also managed to buck the broader market trend, gaining roughly 1% after recovering from intraday lows. The stock had previously recorded three consecutive sessions of declines and had fallen to its lowest level since its highly anticipated public debut.

Outside the technology sector, IBM emerged as one of the strongest performers of the session, rising approximately 4% following an analyst upgrade from JPMorgan. Investor optimism was supported by expectations for continued growth in IBM's software business, particularly as artificial intelligence adoption expands across enterprise markets.

The stock also benefited from renewed interest in quantum computing after the Trump administration announced executive measures aimed at accelerating development within the sector. Optimism surrounding government support helped lift shares of other quantum-computing-related companies as well.

Meanwhile, Qualcomm fell 8.5% amid reports that the company was considering a roughly $4 billion acquisition of AI infrastructure software company Modular. The acquisition speculation arrived during an already difficult trading environment for chipmakers, amplifying downside pressure on the stock.

In the entertainment sector, AMC Entertainment dropped 25% after announcing plans to raise $200 million through a share sale to institutional investors. The company stated that proceeds would be used partly to reduce debt obligations and strengthen its balance sheet.

Commodities and Safe Havens Reflect Cautious Sentiment

Energy markets moved lower as geopolitical risk premiums continued to fade. Crude prices declined after the United States agreed to temporarily ease sanctions on Iranian oil sales as part of broader diplomatic efforts aimed at advancing peace negotiations.

West Texas Intermediate crude fell to approximately $73.40 per barrel, while Brent crude retreated to $76.90 per barrel.

Bond markets reflected a modest shift toward safety, with the yield on the benchmark 10-year U.S. Treasury easing to 4.50%. The move suggests investors remain cautious about growth prospects while continuing to monitor the Federal Reserve's policy trajectory.

Alternative assets also weakened. Bitcoin fell to around $62,400 after trading above $65,000 a day earlier, while gold futures declined 2% to approximately $4,125 per ounce. The U.S. dollar index rose 0.4% to 101.40 as investors sought liquidity and relative safety amid rising market volatility.

Market Outlook

Markets are entering a critical phase as investors reassess the sustainability of AI-driven valuations following months of exceptional gains across technology and semiconductor stocks. The performance of major names such as Nvidia, Micron, Alphabet, Amazon, Tesla, and Qualcomm is likely to remain the primary driver of overall market direction in the near term.

A technical rebound remains possible given the scale of recent declines, particularly if buyers return to high-quality AI and semiconductor companies. However, persistent weakness in memory-chip stocks could signal that investors are becoming more selective and valuation-conscious after an extended period of enthusiasm.

Beyond equities, attention will remain focused on Treasury yields, Federal Reserve expectations, and developments in the energy market. Continued easing of geopolitical tensions could keep oil prices under pressure, while a stronger U.S. dollar may persist if investors continue to favor defensive positioning.

For now, market sentiment appears to have shifted from aggressive risk-taking toward caution, suggesting that volatility may remain elevated until investors gain greater clarity on earnings prospects, AI-related growth expectations, and the outlook for U.S. monetary policy.