Weekly Theme Wrap (Sep 15 – Sep 19)
5 trading days · top 10 themes — most persistent is Semiconductor Equipment at 4 days (weekly avg. +9.5%). Best single day this week: Sep 19, +18.3%.
Average change over the period
Chip themes led the week of Sep 15 to Sep 19. Semiconductor Equipment was strong on 4 days, more than any other theme, with an average change of 9.48%.
Cybersecurity had the week’s highest average change at 14.06% and peaked at 18.34% on Sep 19. S2W and Hanssak led the theme.
Robostar led three themes, including Robotics (Industrial & Collaborative), which averaged 10.78%. A Seoul Shinmun headline on Sep 15 reported Hallacast up 29.94% at the upper limit.
This Week’s Theme Ranking
| Theme | Days strong | Weekly avg. | Best day | Last status | Leader |
|---|---|---|---|---|---|
| Semiconductor Equipment | 4d | +9.5% | 2025-09-18 (+15.1%) | running | GigaVis, Robostar |
| Robotics (Industrial & Collaborative) | 3d | +10.8% | 2025-09-15 (+15.3%) | running | Robostar, Hallacast |
| Semiconductor Materials & Components | 3d | +7.9% | 2025-09-15 (+10.9%) | running | BCnC, LTC, Foosung |
| Quantum Cryptography & Computing | 3d | +5.8% | 2025-09-18 (+11.2%) | running | Ictk, Korea Advanced Materials, HanWool Materials Science |
| Beauty & Cosmetics | 3d | +4.8% | 2025-09-18 (+6.3%) | running | CSA Cosmic, Bonne, CTK |
| Semiconductor Majors (Fabrication) | 3d | +3.8% | 2025-09-16 (+6.0%) | running | DB HiTek, SK hynix |
| Cybersecurity | 2d | +14.1% | 2025-09-19 (+18.3%) | running | S2W, Hanssak |
| AI & Robotics | 2d | +12.0% | 2025-09-19 (+15.0%) | running | Robostar, S2W |
| Smart Factory | 2d | +6.6% | 2025-09-15 (+8.9%) | recurred | SP Systems, Zenix Robotics |
| GLP-1 & Obesity Drugs | 2d | +5.8% | 2025-09-19 (+7.1%) | recurred | OliX Pharmaceuticals, Il Dong Pharmaceutical |
Related News by Theme
- Robotics (Industrial & Collaborative) (2025-09-15) [서울데이터랩]한라캐스트 29.94% 상한가…금일 증시 상승률 1위로 마감 — 서울신문 (Korean)
- Semiconductor Materials & Components (2025-09-15) [장중수급포착] 후성, 외국인/기관 동시 순매수… 주가 +14.11% — 뉴스핌 (Korean)
What to Watch Next Week
Eight of the ten themes ended the week tagged running. They include Semiconductor Majors (Fabrication), led by SK hynix and DB HiTek, which had a best day of 6.04% on Sep 16.
Smart Factory and GLP-1 & Obesity Drugs were tagged recurred, and each was strong on 2 days. GLP-1 & Obesity Drugs peaked at 7.09% on Sep 19, led by OliX Pharmaceuticals and Il Dong Pharmaceutical.
Theme heatmap
| 09-15 | 09-16 | 09-17 | 09-18 | 09-19 | |
|---|---|---|---|---|---|
| Semiconductor Equipment | +10.7 | +5.6 | +15.1 | +6.5 | |
| Robotics (Industrial & Collaborative) | +15.3 | +11.5 | +5.6 | ||
| Semiconductor Materials & Components | +10.9 | +10.0 | +2.9 | ||
| Quantum Cryptography & Computing | +4.1 | +11.2 | +2.1 | ||
| Beauty & Cosmetics | +3.6 | +4.5 | +6.3 | ||
| Semiconductor Majors (Fabrication) | +6.0 | +3.2 | +2.1 | ||
| Cybersecurity | +9.8 | +18.3 | |||
| AI & Robotics | +9.1 | +15.0 | |||
| Smart Factory | +8.9 | +4.2 | |||
| GLP-1 & Obesity Drugs | +4.5 | +7.1 |