U.S. stock indices reached fresh record highs on Tuesday, driven by a surge in semiconductor and AI-infrastructure stocks. Marvell Technology soared 20% after Nvidia's CEO praised it as 'the next trillion-dollar company' and committed a $2 billion investment. Hewlett Packard Enterprise surged 30% on strong earnings and AI orders. Optical networking and chip stocks rallied broadly, while software stocks pulled back significantly.

Following NVIDIA CEO Jensen Huang's bullish commentary on AI infrastructure and optical connectivity demand in data centers, Marvell Technology surged 25% while Coherent Corp. quietly hit an all-time high with a 16% gain. Despite similar exposure to the optical transceiver trade, Coherent remains overlooked by investors despite its direct revenue exposure to AI optical demand. Coherent has rallied 455% from its 52-week low of $76.88 to $426.67.

Nvidia invested $3.8 billion in two AI stocks during Q1 2026: increasing its CoreWeave stake by 95% to $3.65 billion (9% ownership), and investing $2 billion in Coherent as part of a multibillion-dollar partnership for photonics components. CoreWeave faces balance sheet concerns with high leverage, while Coherent is well-positioned in the AI infrastructure supply chain but trades at elevated valuations.

Hedge fund manager Gavin Baker identifies a valuation inefficiency in AI stocks, arguing that memory chips (Micron, SanDisk) and Nvidia are undervalued while optical stocks (Lumentum, Coherent) are overvalued based on multiple expansion. Baker suggests that if the AI cycle continues uniformly across sectors, cheaper stocks should outperform expensive ones over the long term.

U.S. stocks reached record highs on Friday as the Dow Jones surged to 51,047, driven by Dell Technologies' blowout earnings report showing 88% revenue growth and $24.4 billion in AI-related orders. The company raised its fiscal 2027 revenue outlook to $165-169 billion and AI server revenue target to $60 billion, sparking broad gains across AI infrastructure and semiconductor stocks. Easing Middle East tensions pressured energy markets, while the S&P 500 advanced 0.2% and is on pace for its ninth consecutive weekly gain.

Arnhold LLC increased its stake in Kyndryl Holdings by 724,436 shares (60% increase) for approximately $12.75 million during Q1 2026. Despite the purchase, the position's value declined by $6.60 million due to the stock's 69% drop over the past year. The analyst suggests Arnhold's confidence appears misplaced given Kyndryl's stagnant revenue and contracting bottom line.

The global thermoelectric modules market is projected to grow from USD 681 million in 2025 to USD 2.09 billion by 2035, driven by increasing demand for energy efficiency, emission reduction, and applications in electric vehicles, consumer electronics, and aerospace. Bismuth telluride technology dominates with 72.6% market share, while cooling applications lead by functionality. Asia-Pacific holds 41.4% market share, with North America expected to see the highest growth rate at 12.4% CAGR.

Wolfspeed (WOLF) has surged 100% in May 2026, outperforming all U.S. semiconductor stocks including Micron. Despite filing for Chapter 11 bankruptcy in June 2025, the company has emerged debt-free with strategically valuable silicon carbide manufacturing assets. Analysts at Citrini Research highlight Wolfspeed's irreplaceable SiC fabs and 300mm silicon carbide capabilities as critical for next-generation AI data center power infrastructure, positioning the company as a major beneficiary of the AI buildout shift toward power semiconductors.

Nvidia's Q1 2026 13F filing reveals strategic investments in semiconductor and cloud companies, though some announced investments don't appear due to different security structures. The company significantly increased its CoreWeave holdings to $3.657 billion (95% increase in shares), made equal $2 billion investments in both CoreWeave and Nebius, and invested in Coherent for optical networking. Nvidia also made a small $10.4 million biotech investment in Generate Biomedicines.

Poet Technologies is developing optical interconnects for AI data centers with access to a potential $146 billion market opportunity by 2040. However, despite the massive addressable market and a $500 million deal with Lumilens, the company's stock is overvalued relative to its current $1.1 million in annual sales and early-stage commercialization status. Larger competitors like Broadcom, Cisco, and Marvell have entrenched positions that make it difficult for Poet to capture significant market share.

Nvidia, currently the world's most valuable company at $5.5 trillion market cap, is predicted to reach approximately $430 per share by end of 2028, implying a $10.5 trillion valuation. The analyst believes Nvidia will expand beyond being a GPU provider to become an end-to-end AI infrastructure platform through strategic investments in data centers, photonics, and wireless networks. These multibillion-dollar investments in companies like CoreWeave, Lumentum, Coherent, and Nokia are expected to lock in demand and secure premium pricing across the AI infrastructure stack.

Bond market signals suggest a Fed rate hike is now more likely than not by December 2026, reversing earlier expectations for rate cuts. Rising inflation data, including strong retail sales and surging import prices, have prompted a shift to a hawkish stance. AI infrastructure stocks and commodities sold off sharply on Friday as investors repriced risk, with the Nasdaq 100 falling 1.9% in premarket trading.