Trading-day snapshots this week: 2026-10-05 ~ 2026-10-09 (5 sessions). The 244 companies tracked were worth a combined $24.73 trillion, -2.52% from the week's start (market-cap weighted).
| Segment | Cos. | Combined cap | Week |
|---|---|---|---|
| GPU & AI Chips | 21 | $10.08T | -1.82% |
| Memory / HBM | 15 | $3.93T | -5.32% |
| Semiconductor Equipment | 35 | $2.64T | -5.21% |
| Foundry & OSAT | 17 | $2.46T | +1.11% |
| Servers & ODM | 24 | $1.07T | -0.56% |
| Networking & Switching | 12 | $939.2B | +1.65% |
| Data Centers & Cloud | 19 | $772.6B | -4.48% |
| PCB & CCL | 27 | $581.7B | +0.64% |
| Optical Modules & Devices | 23 | $572.2B | -6.10% |
| EDA & Semiconductor IP | 7 | $509.0B | -6.46% |
| Copper Interconnect & Cables | 16 | $486.1B | -2.17% |
| Power Supply | 12 | $448.6B | -0.80% |
| Liquid Cooling & Thermal | 16 | $234.9B | -1.51% |
Best segment: Networking & Switching (+1.65%); worst: EDA & Semiconductor IP (-6.46%).
Top 10 gainers
| Company | Mkt | Segment | Market cap | Week |
|---|---|---|---|---|
| Iteq Corporation | TW | PCB & CCL | $9.2B | +18.02% |
| Gold Circuit Electronics | TW | PCB & CCL | $21.4B | +18.00% |
| Elite Material | TW | PCB & CCL | $67.5B | +15.73% |
| Alchip Technologies | TW | GPU & AI Chips | $11.8B | +14.05% |
| Kaori Heat Treatment | TW | Liquid Cooling & Thermal | $5.0B | +13.25% |
| Jusung Engineering | KR | Semiconductor Equipment | $9.1B | +10.47% |
| GDS Holdings | US | Data Centers & Cloud | $6.1B | +10.41% |
| MiTAC Holdings | TW | Servers & ODM | $3.7B | +9.06% |
| Wistron | TW | Servers & ODM | $20.3B | +9.02% |
| Ciena Corporation | US | Networking & Switching | $60.4B | +8.84% |
Top 10 decliners
| Company | Mkt | Segment | Market cap | Week |
|---|---|---|---|---|
| Yuanjie Semiconductor | SH | Optical Modules & Devices | $23.9B | -20.03% |
| Changguang Huaxin | SH | Optical Modules & Devices | $6.1B | -20.02% |
| Shijia Photons | SH | Optical Modules & Devices | $8.6B | -17.43% |
| Jones Tech | SZ | Liquid Cooling & Thermal | $4.0B | -16.68% |
| Vicor Corporation | US | Power Supply | $12.1B | -15.08% |
| BE Semiconductor Industries | US | Semiconductor Equipment | $15.6B | -14.87% |
| IREN Limited | US | Data Centers & Cloud | $14.1B | -14.49% |
| Broadex Technologies | SZ | Optical Modules & Devices | $8.4B | -13.40% |
| Hua Hong Semiconductor | HK | Foundry & OSAT | $23.5B | -12.93% |
| King Slide Works | TW | Servers & ODM | $31.7B | -12.59% |
The top-10 lineup was unchanged from the week's start.