May 21: 8 Strong Themes — COVID (Diagnostics, Treatments, Vaccines), Shipbuilding Equipment
8 strong themes — 8 recurred. Top: COVID (Diagnostics, Treatments, Vaccines) +10.4%.
Strong themes8
Top change+10.4%
LeaderCellid
Average change by strong theme
Average change of member stocks, by theme · descending
Theme leaders · recent trend
The line is the trend; the end-point colour is the last trading day's direction. Stocks without enough price history show as -
| Theme | Leader | Change | Trend |
|---|---|---|---|
| COVID (Diagnostics, Treatments, Vaccines) | Cellid | +30.00% | |
| Shipbuilding Equipment | Sejin Heavy Industries | +29.91% | |
| Pharma | Green Lifescience | +29.78% | |
| Defense & War | SatrecInitiative | +15.30% | |
| Space & Aerospace (Nuri Rocket, Satellites) | Asia Pacific Satellite lnc | +10.58% | |
| Biosimilars | Binex | +12.50% | |
| Augmented Reality (AR) | Raontech | +18.58% | |
| Construction Majors | Samsung C&T | +11.74% |
On 2025-05-21, eight themes closed higher, led by COVID (Diagnostics, Treatments, Vaccines) at an average change of 10.39%. Every listed stock in all eight themes rose.
Cellid rose 30.0% amid reports of renewed COVID concerns in Greater China. Shipbuilding Equipment followed at an average change of 10.09%, led by Sejin Heavy Industries at 29.91%.
Space news spread across themes. Samsung C&T jumped 11.74% on space infrastructure hopes, while Asia Pacific Satellite lnc gained 10.58% after a UAE terminal supply report.
Today’s Strong Themes at a Glance
| # | Theme | Status | Avg. change | Up/Total | Leader |
|---|---|---|---|---|---|
| 1 | COVID (Diagnostics, Treatments, Vaccines) | recurred after 2 days | +10.4% | 9/9 | Cellid |
| 2 | Shipbuilding Equipment | recurred after 7 days | +10.1% | 10/10 | Sejin Heavy Industries |
| 3 | Pharma | recurred after 8 days | +7.8% | 10/10 | Green Lifescience |
| 4 | Defense & War | recurred after 13 days | +7.7% | 10/10 | SatrecInitiative |
| 5 | Space & Aerospace (Nuri Rocket, Satellites) | recurred after 7 days | +7.2% | 10/10 | Asia Pacific Satellite lnc |
| 6 | Biosimilars | recurred after 8 days | +5.2% | 10/10 | Binex |
| 7 | Augmented Reality (AR) | recurred after 162 days | +5.0% | 10/10 | Raontech |
| 8 | Construction Majors | recurred after 9 days | +4.7% | 4/4 | Samsung C&T |
Theme by Theme
1. COVID (Diagnostics, Treatments, Vaccines) (recurred after 2 days)
- Episode: started 2025-05-21, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
Cellid 299660 | +30.0% | 5,200 | ★ |
Osang Healthcare 036220 | +9.7% | 17,450 | |
Genematrix 109820 | +9.6% | 2,795 | |
Shaperon 378800 | +9.3% | 3,125 | |
Mi 059090 | +9.0% | 14,000 | |
Sugentech 253840 | +7.5% | 7,790 | |
Kbio Labs 038530 | +6.8% | 268 | |
SD Biosensor 137310 | +5.9% | 10,560 | |
SK Bioscience 302440 | +5.8% | 43,000 |
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2. Shipbuilding Equipment (recurred after 7 days)
- Episode: started 2025-05-21, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
Sejin Heavy Industries 075580 | +29.9% | 12,030 | ★ |
Oriental Precision & Engineering 014940 | +11.9% | 5,920 | |
Il Seung 333430 | +11.2% | 5,100 | |
Dongbang Ship Machinery 099410 | +9.9% | 3,660 | |
Cape Industries 064820 | +9.0% | 6,540 | |
Hanla IMS 092460 | +7.3% | 9,650 | |
HD-Hyundai Marine Engine 071970 | +6.5% | 41,200 | |
Samyoung M-tek C0 054540 | +5.8% | 5,450 | |
Sung Kwang Bend 014620 | +4.8% | 26,250 | |
KSP 073010 | +4.5% | 4,025 |
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3. Pharma (recurred after 8 days)
- Episode: started 2025-05-21, day 2
| Stock | Change | Close | Leader |
|---|---|---|---|
Green Lifescience 114450 | +29.8% | 2,205 | ★ |
Seoul Pharma 018680 | +8.0% | 3,565 | |
Samsung Biologics 207940 | +7.1% | 1,100,000 | |
SK Bioscience 302440 | +5.8% | 43,000 | |
Sam Chun Dang Pharm 000250 | +5.1% | 137,600 | |
Daewoong Pharma 069620 | +5.0% | 145,200 | |
Dong-a ST 170900 | +4.7% | 48,250 | |
Shinpoong Pharmaceutical 019170 | +4.5% | 8,060 | |
Jeil Pharmaceutical 271980 | +4.3% | 12,520 | |
Prestige BioPharma 950210 | +4.1% | 13,620 |
4. Defense & War (recurred after 13 days)
- Episode: started 2025-05-21, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
SatrecInitiative 099320 | +15.3% | 53,500 | ★ |
Itcenentec 010280 | +10.0% | 890 | |
MNC Solution 484870 | +8.7% | 113,200 | |
SNT Motiv 064960 | +7.6% | 31,300 | |
COTS Technology 448710 | +6.3% | 19,700 | |
Kencoa Aerospace 274090 | +6.2% | 13,270 | |
Fiberpro 368770 | +6.2% | 7,330 | |
HJ Shipbuilding & Construction 097230 | +5.5% | 7,530 | |
Firstec 010820 | +5.4% | 3,805 | |
Genohco 361390 | +5.4% | 17,750 |
5. Space & Aerospace (Nuri Rocket, Satellites) (recurred after 7 days)
- Episode: started 2025-05-21, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
SatrecInitiative 099320 | +15.3% | 53,500 | |
Asia Pacific Satellite lnc 211270 | +10.6% | 13,070 | ★ |
Intellian Technologies 189300 | +7.0% | 40,800 | |
Kencoa Aerospace 274090 | +6.2% | 13,270 | |
Fiberpro 368770 | +6.2% | 7,330 | |
Contec 451760 | +5.8% | 9,740 | |
Firstec 010820 | +5.4% | 3,805 | |
Genohco 361390 | +5.4% | 17,750 | |
Hyundai-Rotem 064350 | +5.2% | 119,600 | |
Vitzro Tech 042370 | +4.9% | 7,860 |
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6. Biosimilars (recurred after 8 days)
- Episode: started 2025-05-21, day 2
| Stock | Change | Close | Leader |
|---|---|---|---|
Binex 053030 | +12.5% | 18,090 | ★ |
Samsung Biologics 207940 | +7.1% | 1,100,000 | |
Sam Chun Dang Pharm 000250 | +5.1% | 137,600 | |
Daewoong Pharma 069620 | +5.0% | 145,200 | |
Dong-a ST 170900 | +4.7% | 48,250 | |
Aprogen 007460 | +4.5% | 667 | |
Prestige BioPharma 950210 | +4.1% | 13,620 | |
Aprogen Biologics 003060 | +3.0% | 651 | |
Prestige Biologics 334970 | +2.7% | 3,960 | |
Alteogen 196170 | +2.7% | 326,000 |
7. Augmented Reality (AR) (recurred after 162 days)
- Episode: started 2025-05-21, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
Raontech 418420 | +18.6% | 3,255 | ★ |
K3i 431190 | +12.5% | 6,300 | |
Virnect 438700 | +4.6% | 5,470 | |
Elentec 054210 | +3.5% | 5,120 | |
Bitmax 377030 | +3.4% | 2,465 | |
KAON Group 078890 | +2.3% | 3,290 | |
Sekonix 053450 | +2.2% | 5,490 | |
Dongwoon Anatech 094170 | +1.1% | 19,570 | |
Dexter studios 206560 | +1.0% | 7,020 | |
Telechips 054450 | +0.7% | 13,650 |
8. Construction Majors (recurred after 9 days)
- Episode: started 2025-05-21, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
Samsung C&T 028260 | +11.7% | 139,000 | ★ |
Hyundai Engineering & Construction 000720 | +4.7% | 48,950 | |
DL E&c 375500 | +1.2% | 45,750 | |
GS Engineering & Construction 006360 | +1.1% | 19,360 |
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Closing Thoughts
All eight themes are recurrences, and Augmented Reality (AR) returned after a gap of 162 days. The Pharma and Biosimilars episodes run through 2025-05-22.
SatrecInitiative, up 15.3%, appears in both Defense & War and Space & Aerospace (Nuri Rocket, Satellites). Samsung Biologics (7.11%) spans Pharma and Biosimilars.