Chip Stocks and the AI Trade: Nvidia to SK hynix — 2026-09-11

Top developments

SK Hynix rallies on AI-driven memory reallocation

On September 9, SK Hynix shares jumped 7% as artificial intelligence customers pulled wafer capacity toward high-bandwidth chips, creating a supply shortage for conventional DRAM used in smartphones. This "memory allocation split" caused Micron to hold steady while Apple slipped, highlighting how AI infrastructure demand is directly cannibalizing consumer electronics supply chains. The move underscores the tightness in the HBM market, which remains the primary bottleneck for AI accelerator production.

Samsung’s HBM4 gains trigger divergent analyst views

LS Securities raised its target price for Samsung Electronics to 450,000 won while cutting SK Hynix’s target by 27% to 2.4 million won, citing Samsung’s improved HBM4 yield rates and expanded supply capabilities. Samsung’s HBM revenue share reportedly jumped to 33% in Q2 from 21%, significantly narrowing the gap with SK Hynix. This shift suggests that Samsung is successfully closing the technological gap in the critical HBM4 segment, potentially altering the long-term margin structure for both Korean memory giants.

TSMC CoWoS capacity overflow benefits secondary suppliers

TSMC’s advanced packaging capacity (CoWoS) remains fully booked through 2026, forcing orders to spill over to non-TSMC providers like Intel, ASE Holdings, Amkor, and UMC. This "order spillover" has driven rapid growth for these secondary suppliers, as they absorb demand that TSMC cannot meet due to physical expansion constraints. The inability of TSMC to fully satisfy AI accelerator packaging needs is creating a structural tailwind for the broader advanced packaging ecosystem beyond its own fabs.

Foreign investors drive Taiwan index to historic highs

Foreign investors bought a net NT$88.3 billion worth of Taiwan stocks on September 7, marking the fourth-largest daily net purchase in history, with nearly NT$40 billion directed specifically at TSMC. This influx pushed the weighted index to 47,326 points, a second-highest close ever, driven by optimism around AI chip demand and strong performance in the US SOX index. The aggressive buying reflects global confidence in Taiwan’s central role in the AI supply chain, particularly for logic and packaging.

Local view

In Taiwan, media outlets highlight the disconnect between TSMC’s dominant market position and the physical limits of its packaging capacity. United Daily News reports that despite massive capex, TSMC cannot keep up with AI demand, leading to a "spillover effect" where competitors like ASE and UMC are seeing unexpected order surges. Meanwhile, Newtalk News emphasizes the sheer scale of foreign capital inflows, noting that institutional investors are treating TSMC not just as a stock but as a primary vehicle for AI exposure.

In South Korea, the narrative is shifting from SK Hynix’s undisputed dominance to a more contested HBM landscape. Seoul Economic Daily reports that analysts are increasingly skeptical of SK Hynix’s ability to maintain its previous premium margins as Samsung catches up in HBM4 yields. This has led to a divergence in stock performance expectations, with Samsung gaining favor among analysts who believe its manufacturing scale will allow it to capture more of the AI memory pie.

Context & numbers

• Foreign Net Buying: Foreign investors net bought NT$88.3 billion in Taiwan equities on Sept 7, with ~NT$40 billion in TSMC alone.
• HBM Market Share: Samsung’s HBM revenue share rose to 33% in Q2 2026, up from 21% previously.
• Analyst Targets: LS Securities raised Samsung target to 450,000 KRW; cut SK Hynix to 2.4 million KRW.
• CoWoS Capacity: TSMC’s CoWoS capacity is sold out through 2026, estimated at ~130,000 wafers per month by year-end.

On the radar

• Memory Spot Prices: TrendForce projects a further 55–60% quarter-on-quarter gain in server DRAM contract prices for Q1 2026, following a 45–50% rise in Q4 2025.
• Export Controls: BIS continues to review export licenses for Nvidia H200 and AMD MI325X on a case-by-case basis under the revised January 2026 policy, a key factor for future China revenue guidance.
• Japanese Equipment Stocks: Investors are watching Advantest and Tokyo Electron for signs of sustained demand as hyperscaler capex cycles continue into 2026, with recent selloffs seen as potential entry points by some local analysts.