Chip Stocks and the AI Trade: Nvidia to SK hynix — October 3, 2026

Top developments

TSMC Reaches All-Time High on AI Infrastructure Demand

Taiwan Semiconductor Manufacturing Company stock surged to TWD 2,510, marking a new historical peak, as the company rides strong AI chip demand and advanced packaging momentum. The rally lifted Taiwan's weighted index to 48,353 points, also a record. Analysts are flagging TSMC's October 15 earnings call and quarterly guidance as key catalysts for further price signals; The Motley Fool noted that any pricing power announcements could accelerate bullish sentiment.

Bernstein Cuts SK Hynix Target on HBM Competitive Pressure

Bernstein downgraded SK Hynix's price target and revised its outlook to reflect Samsung's projected gains in HBM market share, according to multiple Korean investment research reports released October 1–2. DS Securities separately cut SK Hynix to KRW 2.64 million on won strength, though it flagged HBM4 growth potential in the fourth quarter. The shifts highlight concerns over SK Hynix's near-term export dynamics versus Samsung's advanced memory production.

Foreign Investors Liquidate Samsung and SK Hynix; Domestic ETF Buyers Step In

Foreign investors net-sold over KRW 16 trillion (approximately USD 12 billion) combined in Samsung Electronics and SK Hynix during September 2026, ending a two-day buying streak. However, domestic Korean semiconductor ETFs accumulated shares across both stocks, suggesting domestic asset managers are taking contrarian positions. The divergence reflects cautious foreign sentiment on valuation versus domestic confidence in the long-cycle AI capex narrative.

Advantest Rises to All-Time High on Micron's Upbeat Guidance

Japanese semiconductor equipment giant Advantest (東京エレクトロン alternative reference) rallied sharply after Micron Technology delivered better-than-expected Q2 earnings and raised forward guidance, signaling sustained DRAM and HBM demand. The rally underscores the upstream equipment-makers' indirect exposure to hyperscaler capex and memory supply tightness.

CoWoS-L Advanced Packaging Becomes Google TPU Bottleneck

Taiwan-based research cited TSMC's CoWoS-L advanced packaging as the critical enabler for Google's next-generation TPU v9 processors (including 3nm Zebrafish and 2nm Humufish SKUs). This positioning reinforces TSMC's stranglehold on cutting-edge AI accelerator assembly and highlights the memory-logic interconnect as a key supply constraint for 2026–2027.

Local view

Taiwan: Storm Media reported that TSMC's October 15 earnings call is expected to provide critical signals on pricing power and CoWoS capacity allocation. American financial media (The Motley Fool) highlighted TSMC's advanced-node monopoly and scale advantage as justifying premium valuations even after this week's rally. Taiwan stock market commentary noted that foreign institutional buyers remain net long the semiconductor sector via ETF channels despite tactical rotation out of individual mega-cap names.

South Korea: Financial News (파이낸셜뉴스) reported that Samsung Electronics and SK Hynix have combined third-quarter operating profit forecasts exceeding KRW 188 trillion, prompting brokers to raise target prices despite foreign-investor selling. Naver Finance and Business Post cautioned investors against over-concentrating in the two memory stocks, recommending portfolio diversification to mitigate cyclical memory-price risk. The narrative centers on Q4 HBM4 ramp as the key inflection point.

Japan: Nikkei reported that Advantest and laser-inspection play Lasertec rallied sharply on US Micron earnings momentum, reflecting the supply-chain premium for semiconductor test and process-control equipment. Tokyo Keizai noted that Nvidia itself approached a record $6 trillion market cap on sustained AI enthusiasm, maintaining upstream capex expectations.

Context & numbers

• TSMC share price: TWD 2,510 (all-time high, week of Oct 1–3)
• Taiwan Weighted Index: 48,353 points (record close)
• SK Hynix target revision: KRW 2.64 million (from prior KRW 3.10 million, DS Securities)
• Samsung + SK Hynix foreign sell-off: KRW 16+ trillion net liquidation in September 2026
• TSMC 2026 CapEx guidance: High end of USD 52–56 billion (on track for AI-node CoWoS and advanced packaging)
• Nvidia market capitalization: ~USD 4.3 trillion entering Q4 2026, highest ever recorded
• Bernstein HBM outlook: Samsung projected to gain share; SK Hynix HBM4 ramp critical for Q4 recovery

On the radar

• TSMC earnings call (October 15): Watch for CoWoS capacity guidance, advanced-node pricing signals, and 2027 capex outlook. Any commentary on customer concentration (Nvidia exposure) will influence valuation.
• SK Hynix Q3 results (early November expected): HBM4 shipment data and guidance will determine whether memory-stock recovery narrative holds; currency headwinds remain a watch point.
• US export controls and China: Department of Commerce revised license policy (as of January 2026) to case-by-case review for Nvidia H200, AMD MI325X, and similar chips. Any new tightening or relaxation in October–November could shift AI capex timing and regional allocation.
• Micron earnings momentum: Strong Q2 forward guidance (cited in Advantest rally) suggests memory pricing resilience; watch Q3 guidance (typically early November) for confirmation or signs of capacity oversupply.