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SK Hynix Prepares HBM4 Production to Defend Market Lead Over Rivals

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SK Hynix (000660.KS) announced on Friday that it has completed internal certification of its HBM4 (high-bandwidth memory 4) chips and established a production system, positioning itself to maintain its dominance in the advanced memory market.

Key Developments

  • In March 2025, SK Hynix shipped 12-layer HBM4 chip samples to customers.

  • The company aims to complete mass production preparations for these chips within H2 2025.

  • Shares rose 7% to a record high of 328,500 won ($236.71), outperforming the benchmark KOSPI’s 1.5% gain.

Market Context

  • HBM technology: First introduced in 2013, HBM stacks DRAM vertically to save space, cut power use, and process vast data volumes required by AI workloads.

  • Market share: SK Hynix is projected to hold about 60% of the HBM market in 2026, down slightly from its current 66%, according to Meritz Securities.

  • Customers: Nvidia remains its largest client, though Samsung Electronics and Micron supply smaller volumes.

Rival Strategies

  • Samsung Electronics: Plans to use a 1c-nanometer node for HBM4, compared to SK Hynix’s 1b-nanometer process, signaling a push to catch up despite a weaker track record. Samsung already provided HBM4 samples to customers and plans to start supply in 2026.

  • Micron: Competing with custom-built logic dies (“base dies”) that make it harder for customers to switch suppliers.

Industry Impact

  • SK Hynix’s first-mover advantage in HBM4 is expected to secure early contracts with major AI players like Nvidia.

  • Analysts note that customer-specific base dies mark a technological shift that could lock buyers into long-term supplier relationships.

Market Performance YTD

  • SK Hynix: +88.9%

  • Samsung Electronics: +41.7%

  • Micron (Nasdaq): +78.9%

  • KOSPI benchmark: +41.5%

Oracle’s Record-Breaking Surge Highlights AI Trade’s Dominance in Markets

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Wall Street’s AI-driven rally hit another milestone this week as Oracle’s shares soared 36%, pushing its market value to $922 billion and reinforcing artificial intelligence as the defining force behind 2025’s equity boom.

Oracle’s AI Catalyst

  • The surge followed Oracle’s disclosure of four multi-billion-dollar cloud contracts driven by demand from AI companies such as OpenAI and xAI.

  • The move places Oracle among the 10 most valuable U.S. companies, overtaking names like Eli Lilly, JPMorgan, and Walmart.

  • Oracle’s stock has nearly doubled in 2025, making it one of the top S&P 500 performers.

AI Trade in Context

  • Nvidia, Microsoft, Alphabet, Amazon, Palantir, Broadcom, Meta Platforms, and Oracle together have accounted for about half of the S&P 500’s 11% gain this year.

  • Nvidia remains the world’s most valuable company at $4.3 trillion, despite a minor pullback after its August sales forecast.

  • The technology sector overall is up 16% year-to-date, with forward P/E ratios at 28x earnings — well above the 10-year average of 22x.

Broader Market Impact

  • AI-linked stocks now dominate trading activity: 9 of the 10 most traded companies this week were AI-related (Apple being the lone exception).

  • The enthusiasm has spread beyond tech: utilities and industrials like GE Vernova, Constellation Energy, and Vistra are gaining on expectations of higher energy demand to fuel AI infrastructure.

  • This has lifted the S&P 500’s overall valuation to 22x forward earnings, near a four-year high.

Investor Sentiment

Despite concerns about overheating, analysts see Oracle’s surge as proof that capital continues flowing heavily into AI plays.

“I was very surprised by the magnitude of the (Oracle) jump and it shows there is still a lot of life left in the AI trade,” said Chuck Carlson of Horizon Investment Services.

OpenAI and Nvidia to Back Billions in UK Data Center Investments – Bloomberg

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OpenAI and Nvidia plan to announce major support for billions of dollars in UK data center projects next week, according to a Bloomberg report citing people familiar with the matter. The initiative will be carried out in partnership with London-based Nscale Global Holdings.

High-Profile Visit

  • Sam Altman (OpenAI CEO) and Jensen Huang (Nvidia CEO) are expected to be in the UK as part of a U.S. tech delegation coinciding with President Donald Trump’s visit.

  • Several other U.S. firms are also preparing to unveil tens of billions of dollars in UK investments during the trip.

Strategic Importance

The planned data center buildout reflects soaring demand for AI and cloud infrastructure, as companies worldwide race to secure computing power for advanced machine learning applications.

Silence From Stakeholders

  • Nvidia declined to comment.

  • OpenAI, Nscale Global, the White House, and Downing Street did not immediately respond to Reuters requests for comment.

If confirmed, the pledge would mark one of the largest U.S. tech investments in the UK’s digital infrastructure, reinforcing Britain’s bid to position itself as a hub for AI innovation and cloud expansion.