Hyperscaler 2026 capex total $725B (+64% YoY). However, the real constraint on GPU shipments is not the GPU itself — TSMC CoWoS, HBM metrology, advanced chemistry, and 1.6T interconnect are simultaneously in short supply. SMTC · NVMI · ENTG · AMKR — All 4 stocks are covered with an OW (Overweight) rating.
The bottleneck is not the GPU, but packaging, metrology, chemistry, and interconnect. NVIDIA Blackwell is sold-out until mid-2026, with a backlog of 3.6 million units (FinancialContent, 2025-12-29)FACT. However, the actual source of shipping constraints is the fact that HBM+packaging accounts for approximately 2/3 of the B200 manufacturing cost (Epoch AI, 2025)FACT. Although TSMC is increasing CoWoS capacity fourfold from 35k wpm in 2024 to 130k wpm by the end of 2026 (Morgan Stanley, 2026-02), NVIDIA alone has pre-booked approximately 60% of the capacity for the 2026 fiscal year (TrendForce, 2025-12)FACT. AMD MI350/MI400, Broadcom·Google·Meta's own ASICs, OSAT (AMKR/ASE) routing is a reasonable optionINFERENCE.
In this structure, "One generation above (N+1) process transition = increased metrology intensity" is arithmetic. GAA (nanosheet) channel thickness control of ±0.1nm is required, and the frequency of inspection increases rapidly due to the application of EUV to HBM4's d1c/d1d DRAM node (SemiEngineering, 2025)FACT. At the same time, the consumption of chemical consumables (CMP slurry, filters, gas) increases non-linearly per wafer.
Therefore, this report groups 4 stocks under the same theme — SMTC (1.6T active copper/optical interconnect), NVMI (metrology niche #2, direct beneficiary of GAA·HBM), ENTG (chemical·filtration·CMP, deleveraging in progress), AMKR (OSAT #2, Arizona advanced packaging).
The macro setup also supports this thesis. The Fed froze at 3.50–3.75% at the FOMC on April 30, with a hawkish tone reinforced by more than 2 dissents (Reuters, 2026-04-30)FACT. 10Y 4.42%, DXY 98–99 range — Duration is a burden, but SOX is overwhelming the macro headwinds with the longest winning streak of 18 trading days in 32 years, +44% (Yahoo, 2026-04)FACT. While short-term volatility is recognized as Burry's SOXX put betting has emerged, the visibility of capacity sold-out fully offsets earnings risk.