On Tuesday, the top stock by trading volume was Micron Technology (MU), which closed up 2.17% with a turnover of $45.851 billion, pushing its market capitalization back above the $1 trillion mark. The company's CEO stated during an earnings call that the tight supply-demand situation for memory chips is expected to persist beyond 2027. This outlook is driven by demand from the entire industry chain for AI computing power, intelligent agents, and autonomous driving, coupled with supply constraints due to the long expansion cycles for wafer manufacturing and advanced packaging. This has fundamentally shifted market sentiment away from the pessimistic view that the memory cycle had peaked, steering the industry towards a growth narrative driven by AI and expanding its valuation potential.

The second most traded stock was NVIDIA (NVDA), which gained 1.97% with a turnover of $21.973 billion. NVIDIA provided more details on its data center CPU, "Vera," including technical specifications, performance benchmarks, and chip architecture, aiding potential customers in a comprehensive product evaluation. The company noted that Vera chips were delivered to customers including OpenAI, Anthropic, and SpaceX in June. While NVIDIA is often seen as a bellwether for the information technology sector, it remains a challenger in the CPU field, competing against established rivals Intel and Advanced Micro Devices.

Syndax Pharmaceuticals (SNDX) was the third most active, surging 14.27% on a turnover of $21.045 billion, as US memory chip stocks rallied broadly.

Advanced Micro Devices (AMD) ranked fourth, closing up 8.11% with a turnover of $14.86 billion. On July 20, AMD unveiled its first rack-scale AI system, Helios, to global media, marking its official entry into the full-stack data center AI infrastructure market to challenge NVIDIA's dominance. This integrated hardware and software platform has already secured orders from several global tech giants, with mass deployment expected to begin in 2026. AMD anticipates this business could generate tens of billions of dollars in data center AI revenue starting in 2027, potentially reshaping the global AI computing landscape. The Helios system, named after the Greek sun god, is a standardized, open rack-scale AI reference design that integrates AMD's next-generation Instinct GPUs, EPYC CPUs, Pensando networking chips, and the ROCm software platform.

Intel (INTC) was the seventh most traded stock, advancing 8.64% on a turnover of $10.64 billion. Media reports citing company insiders indicated Intel plans to cut staff in its data center division. Wedbush analyst Matt Bryson noted in a client report that Intel's revenue and profit margins could significantly exceed market expectations, a trend likely to continue into the third quarter. He maintained a Neutral rating with a $95 price target, suggesting limited near-term upside despite potential earnings beats, citing high sector valuations and investor profit-taking as reasons for caution, similar to the recent reaction to Taiwan Semiconductor Manufacturing's strong results.

Taiwan Semiconductor Manufacturing (TSM) was the eleventh most active, rising 5.55% with a turnover of $7.628 billion. Reports on Tuesday indicated TSMC plans to raise prices for both advanced and mature node chip manufacturing by up to 10% starting in 2027, in response to rising costs for materials, manufacturing equipment, and overseas fab construction. Negotiations with customers are underway, affecting 7-nanometer and more advanced processes, which accounted for about 77% of revenue in the April-June quarter. The base price increase is expected to be between 5% and 10%, depending on the customer and product.

SK Hynix was the thirteenth most traded, surging 13.75% on a turnover of $6.315 billion. Tech media reported that Samsung Electronics, SK Hynix, and Micron Technology have scaled back or abandoned plans to commercialize CXL expansion device controllers. DRAM manufacturers had intended to sell CXL memory as complete modules with integrated controllers to capture more profit, but data center customers prefer the theoretically lower-cost approach of separately purchasing DIMM memory modules and CXL controllers to assemble add-in cards.

Seagate Technology PLC (STX) ranked sixteenth, climbing 11.14% with a turnover of $5.322 billion. The company showcased its AI data storage solutions at the 2026 World Artificial Intelligence Conference, focusing on the needs of AI data centers and emphasizing the concept that "data flow drives AI operation."

NEBIUS (NBIS) was the seventeenth most active, jumping 18.78% on a turnover of $5.258 billion. NVIDIA filed a Schedule 13G with the SEC on Monday, disclosing beneficial ownership of 22.2564 million Class A ordinary shares of Nebius, representing a 9.3% stake. The filing includes shares previously reported in a 13F filing for the quarter ended March 31 and shares convertible from a prepaid warrant. Concurrently, Northland Securities significantly raised its price target for Nebius from $248 to $410, maintaining an Outperform rating and implying over 124% upside potential. The firm applied a valuation framework similar to that used for CoreWeave, projecting Nebius could capture about 14% of an $800 billion AI-as-a-Service market in the long term, with a terminal free cash flow margin estimated at 30%.

Danaher (DHR) was the nineteenth most traded stock, declining 10.99% on a turnover of $4.79 billion. Although the company reported second-quarter revenue and profit that beat market expectations and raised its full-year EPS guidance, its stock fell sharply due to order timing delays from customers in its biopharma business.