Today’s Market Recap: Tech Stocks Rally Amid AI Infrastructure Expansion
TradingKey - On January 27, 2026, the S&P 500 rose 0.41% to close at 6,979. The Nasdaq Composite advanced 0.91% to 23,817.
UnitedHealth Group (UNH) fell 19.61% to $282.69. Quarterly results showed a sharp decline in operational earnings, heavy restructuring costs, and 2026 revenue guidance below expectations. The stock led losses on the Dow Jones Industrial Average.
Microsoft (MSFT) gained more than 2% ahead of its earnings report. Tesla (TSLA) slipped 1%. Micron (MU) rose over 5% after announcing a $24 billion expansion in NAND production. Corning (GLW) jumped more than 15% following a multi-year fiber-optic cable supply agreement with Meta Platforms (META).
CoreWeave rallied after Nvidia (NVDA) announced a $2 billion equity investment. The deal, priced at $87.20 per share, strengthens Nvidia’s partnership with the AI infrastructure firm. Market response accelerated on reports that Nvidia’s stake could grow to 11% while supporting plans for over 5 gigawatts of AI data center capacity by 2030. A Deutsche Bank upgrade further lifted sentiment.
The U.S. dollar fell more than 1%, hitting a four-year low. It marked the steepest four-day decline since former President Trump’s tariff announcements in April last year.
Bitcoin gained over 2%, reclaiming the $89,000 level.
Crude oil rose more than 3% intraday, driven by renewed Middle East tensions. Gold closed at a new all-time high for the sixth straight session after rising over 3% earlier in the day. Silver saw significant intraday swings but ended the session flat.
Anthropic is reportedly finalizing a new funding round of approximately $20 billion—double its initial target—pushing its valuation to $350 billion. The sharp increase highlights growing institutional interest in the company, which is seen as a key competitor to OpenAI. Investor enthusiasm is driven by Anthropic’s enterprise-focused AI solutions, stable leadership, and the widespread adoption of its programming assistant, Claude Code.
Corning shares surged more than 19% on elevated volume, reaching their highest intraday level since 2004. The rally followed reports that Meta Platforms has signed a multi-year fiber optic supply agreement worth up to $6 billion. The contract secures critical fiber-based infrastructure for Meta’s global AI data center expansion plans. The optics will serve as the backbone of AI system interconnects, enabling near-light-speed data transfer across thousands of GPUs. Corning’s products will be fully deployed in Meta’s two next-generation projects: the 1-gigawatt "Prometheus" facility in Ohio and the 5-gigawatt "Hyperion" complex in Louisiana.
In the memory chip market, South Korean media reports that Samsung and SK Hynix have substantially increased the prices of DRAM sold to Apple this quarter compared to Q4 last year. The cost of low-power DRAM supplied to Apple (AAPL) rose by roughly 80% to 100%, reflecting tight inventory in the supply chain. Notably, Apple—typically known for aggressive cost controls—appears to have accepted the price hikes, signaling a shift in bargaining dynamics. With new iPhone releases expected later this year, additional price increases could follow.
Micron announced a long-term investment plan totaling $24 billion to build a new NAND fabrication plant in Singapore over the next decade. The site, which complements Micron’s existing manufacturing base in the country, is aimed at supporting growing memory demand fueled by AI workloads. The news builds on a $7 billion investment commitment the company revealed in early 2025.
Highlights
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