Sep 2025 Theme Wrap — The Monthly Theme Map
22 trading days · 95 recurring themes · top 15 themes — most persistent is Semiconductor Equipment at 14 days (monthly avg. +7.5%). Best single day this month: Sep 19, +18.3%.
Average change over the period
September was a chip month. Semiconductor Equipment led with 14 strong days, followed by Semiconductor Majors (Fabrication) at 13 and Semiconductor Materials & Components at 12.
Cybersecurity posted the biggest single-day move, 18.34% on Sep 19. Robotics (Industrial & Collaborative) hit 15.29% on Sep 15 and averaged 8.33%.
Robostar was among the leaders of Semiconductor Equipment, Robotics (Industrial & Collaborative) and AI & Robotics. Semiconductor Equipment averaged 7.48%.
95 themes recurred this month.
Monthly Theme Ranking
| Theme | Days strong | Monthly avg. | Best day | Leader |
|---|---|---|---|---|
| Semiconductor Equipment | 14d | +7.5% | 2025-09-18 (+15.1%) | GigaVis, Russell, Robostar |
| Semiconductor Majors (Fabrication) | 13d | +2.6% | 2025-09-16 (+6.0%) | DB HiTek, SK hynix, Samsung Electronics |
| Semiconductor Materials & Components | 12d | +6.5% | 2025-09-12 (+13.0%) | ISC, BCnC, Semcns |
| Robotics (Industrial & Collaborative) | 11d | +8.3% | 2025-09-15 (+15.3%) | Robostar, Samhyun, Smec |
| AI & Robotics | 8d | +7.3% | 2025-09-19 (+15.0%) | Datasolution, Russell, Robostar |
| Pharma | 8d | +5.3% | 2025-09-19 (+8.5%) | Wsi, It-chem, Il Dong Pharmaceutical |
| HBM (High Bandwidth Memory) | 8d | +3.8% | 2025-09-18 (+8.5%) | Di, Auros Technology, YC |
| Cybersecurity | 7d | +9.6% | 2025-09-19 (+18.3%) | Sands Lab, Softcamp, CyberOne |
| GLP-1 & Obesity Drugs | 7d | +6.1% | 2025-09-22 (+8.9%) | KoBioLabs, Dae Hwa Pharm, OliX Pharmaceuticals |
| Defense & War | 7d | +6.1% | 2025-09-11 (+8.6%) | HJ Shipbuilding & Construction, Samyang Comtech, Speco |
| Smart Factory | 7d | +6.1% | 2025-09-02 (+9.0%) | SP Systems, ISAAC Engineering, Zenix Robotics |
| System Semiconductors | 7d | +5.7% | 2025-09-22 (+8.8%) | SFA Semicon, Nextchip, Ranix |
| Nuclear | 7d | +5.2% | 2025-09-04 (+8.0%) | Kangwon Energy, Bosung Power Technology, Samyoung M-tek C0 |
| Biosimilars | 7d | +2.8% | 2025-09-19 (+3.2%) | Binex, Aprogen, Prestige BioPharma |
| Battery | 6d | +6.8% | 2025-09-25 (+8.7%) | NanoTIM, Daejin Advanced Materials, AI Korea |
What to Watch Next Month
Semiconductor Equipment, Semiconductor Materials & Components, HBM (High Bandwidth Memory), System Semiconductors and Nuclear ended the month tagged running. All others were recurred.
Battery had the month’s latest best day, Sep 25, at 8.68%. Pharma and GLP-1 & Obesity Drugs both had Il Dong Pharmaceutical among their leaders.
Theme heatmap
| 09-01 | 09-02 | 09-03 | 09-04 | 09-05 | 09-08 | 09-09 | 09-10 | 09-11 | 09-12 | 09-15 | 09-16 | 09-17 | 09-18 | 09-19 | 09-22 | 09-23 | 09-24 | 09-25 | 09-26 | 09-29 | 09-30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Semiconductor Equipment | +6.0 | +6.3 | +5.5 | +6.0 | +6.2 | +9.8 | +10.7 | +5.6 | +15.1 | +6.5 | +11.4 | +5.2 | +6.0 | +4.3 | ||||||||
| Semiconductor Majors (Fabrication) | +2.0 | +0.7 | +1.6 | +0.9 | +2.9 | +5.2 | +1.3 | +3.4 | +6.0 | +3.2 | +2.1 | +2.1 | +2.0 | |||||||||
| Semiconductor Materials & Components | +3.2 | +4.3 | +4.9 | +4.7 | +13.0 | +10.9 | +10.0 | +2.9 | +7.0 | +5.9 | +8.0 | +3.7 | ||||||||||
| Robotics (Industrial & Collaborative) | +11.4 | +3.6 | +9.5 | +10.3 | +6.6 | +15.3 | +11.5 | +5.6 | +5.3 | +4.8 | +7.7 | |||||||||||
| AI & Robotics | +8.6 | +3.9 | +4.4 | +9.1 | +15.0 | +5.6 | +4.3 | +7.4 | ||||||||||||||
| Pharma | +6.0 | +4.9 | +3.8 | +5.0 | +4.8 | +3.9 | +8.5 | +6.0 | ||||||||||||||
| HBM (High Bandwidth Memory) | +2.6 | +4.3 | +2.8 | +4.2 | +8.5 | +2.5 | +3.8 | +1.7 | ||||||||||||||
| Cybersecurity | +4.3 | +9.1 | +9.8 | +18.3 | +5.5 | +8.4 | +11.6 | |||||||||||||||
| GLP-1 & Obesity Drugs | +8.6 | +3.3 | +3.6 | +4.5 | +7.1 | +8.9 | +6.9 | |||||||||||||||
| Defense & War | +5.7 | +5.9 | +8.2 | +8.6 | +5.7 | +4.6 | +4.2 | |||||||||||||||
| Smart Factory | +9.0 | +3.5 | +7.8 | +3.7 | +5.5 | +8.9 | +4.2 | |||||||||||||||
| System Semiconductors | +5.7 | +5.3 | +5.4 | +8.8 | +5.7 | +3.6 | +5.2 | |||||||||||||||
| Nuclear | +4.7 | +8.0 | +6.2 | +2.1 | +3.9 | +4.8 | +6.5 | |||||||||||||||
| Biosimilars | +2.9 | +3.1 | +2.6 | +3.0 | +2.2 | +3.2 | +2.5 | |||||||||||||||
| Battery | +5.7 | +4.6 | +8.3 | +6.2 | +8.7 | +7.3 |