NVIDIA, ranked first in Tuesday's US stock trading volume, closed down 1.33%, with a turnover of $31.649 billion. Ayar Labs, a company developing optical data transmission chips and backed by NVIDIA, announced the completion of a $500 million Series E funding round, valuing the company at $3.75 billion. Additionally, the company announced plans on Monday to invest in two publicly traded optical networking equipment suppliers: Lumentum Holdings Inc. and Coherent Corp. Each company is set to receive a $2 billion investment. NVIDIA stated that this investment includes "multi-billion-dollar procurement commitments and future access" to certain laser components. For Coherent, the agreement also covers other optical networking products.
Tesla Motors, the second most actively traded stock, closed down 2.70%, with a turnover of $24.315 billion. Reports indicate that Elon Musk's X and xAI plan to fully repay approximately $17.5 billion in debt, although the source of funds remains unknown. It is reported that Morgan Stanley has informed creditors of the full repayment plan for X and xAI. The $3 billion high-yield bonds issued by xAI will be redeemed at a premium. Prior to this plan, the two companies had undertaken a series of significant operations, including SpaceX's acquisition of xAI and xAI's acquisition of X along with its associated debt.
Microsoft, ranking third, closed up 1.35%, with a turnover of $14.947 billion. According to the latest data from Statcounter, Microsoft's Windows 11 market share has surpassed that of Windows 10. The data shows Windows 11 holds a 72.57% market share, while Windows 10 holds 26.45%. This figure appears to confirm Microsoft's statement earlier this year that its flagship operating system had surpassed the one billion user mark. It is important to note that Statcounter's data is sourced from tracking codes installed on 1.5 million websites globally. In the absence of official telemetry data from Microsoft, this remains one of the few independent indicators of operating system market share. The company revises these figures as more data becomes available.
Micron Technology, ranked fourth, closed down 7.99%, with a turnover of $14.755 billion. The US chip storage sector fell sharply on Tuesday after JPMorgan stated that market preference for memory chips had gone too far. JPMorgan issued a research report reinstating NVIDIA as its top pick in the semiconductor sector, replacing its previous top pick, Micron Technology. Analyst Joseph Moore wrote in a note to clients, "The interplay between memory chips and NVIDIA is quite interesting. The market generally believes that the boom cycle reflected in memory stocks is longer and more sustainable than that of processor stocks; we do not entirely agree. In our discussions with clients about memory chips and NVIDIA's business, we find that the current industry conditions for both are exceptionally strong. However, based on current valuations, the market tends to favor memory chips as having higher investment value due to their more resilient earnings revision potential. Yet, for the performance of both stocks through 2027, the market currently lacks strong conviction."
SanDisk, ranked fifth, closed down 8.67%, with a turnover of $11.702 billion. The US chip storage sector was generally lower on Tuesday.
Palantir, ranked eighth, closed up 1.41%, with a turnover of $9.642 billion. Following a large-scale attack by the US and Israel on Iran on February 28th, it was reported that the US military utilized technology from company Anthropic in a major airstrike against Iran. Informed sources confirmed that command centers, including US Central Command, are using Anthropic's Claude AI tool for intelligence assessment, target identification, and simulating combat scenarios, highlighting the involvement of AI tools in military operations. Claude's ability to support military operations is attributed to a partnership between Anthropic and data analytics company Palantir, whose platform is widely used by the Department of Defense and law enforcement agencies.
AMD, ranked eleventh, closed down 3.86%, with a turnover of $7.122 billion. The US chip sector was broadly lower on Tuesday.
TSMC, ranked twelfth, closed down 4.33%, with a turnover of $6.463 billion. According to media reports, TSMC has recently notified customers to book orders for its N2 process early, as most of the capacity through the end of 2027 has been pre-booked, with a lead time of up to six quarters for the remaining capacity. This means that even if capacity is successfully allocated, the cycle from production start to receiving finished chips could take up to 12 months, posing significant challenges for product planning.
Lumentum Holdings, ranked sixteenth, closed down 11.34%, with a turnover of $5.053 billion. NVIDIA recently announced a multi-year strategic agreement with Lumentum Holdings to accelerate innovation in advanced optical technologies, including R&D, for next-generation AI infrastructure and system design. The non-exclusive agreement includes NVIDIA's multi-billion-dollar purchasing commitment and future access to advanced laser component capacity. Furthermore, NVIDIA will invest $2 billion in Lumentum to support R&D, future capacity, and operations as Lumentum builds its US manufacturing capabilities at a new wafer fab.
Intel, ranked nineteenth, closed down 5.27%, with a turnover of $3.549 billion. Reports indicate that Ericsson and Intel will collaborate to promote comprehensive ecosystem support for AI-native 6G deployment and application scenarios, enabling a seamless evolution. The two companies formally announced the collaboration during the 2026 Barcelona Mobile World Congress (MWC), further deepening a decades-long partnership. This collaboration will cover mobile connectivity, cloud technology, computing power, platform-level security, and network functions for AI-driven RAN and packet core application scenarios, thereby strengthening ecosystem empowerment and accelerating the time-to-market for cloud-native solutions.
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