Apr 20: 8 Strong Themes — Cybersecurity, Quantum Cryptography & Computing
8 strong themes — 4 running · 4 recurred. Top: Cybersecurity +19.5%.
Strong themes8
Top change+19.5%
LeaderBellock
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 |
|---|---|---|---|
| Cybersecurity | Bellock | +29.99% | |
| Quantum Cryptography & Computing | Finetek | +30.00% | |
| Battery | Finetek | +30.00% | |
| Semiconductor Majors (Fabrication) | DB HiTek | +18.52% | |
| Semiconductor Equipment | Jusung Engineering | +29.97% | |
| Defense & War | Haein | +29.94% | |
| COVID (Diagnostics, Treatments, Vaccines) | GeneOne Life Science | +29.99% | |
| EV | Sangsinenergydisplayprecision | +20.22% |
The strongest themes on 2026-04-20 had every listed stock close higher. Cybersecurity led with an average change of 19.51% across 10 stocks.
Quantum Cryptography & Computing followed with an average change of 18.06%, led by Finetek at 30.0%. Dream Security, up 29.98%, appeared in both security-related themes.
Semiconductor Equipment extended its streak to 7 with an average change of 10.52%. Jusung Engineering led that group with a gain of 29.97%.
Today’s Strong Themes at a Glance
| # | Theme | Status | Avg. change | Up/Total | Leader |
|---|---|---|---|---|---|
| 1 | Cybersecurity | recurred after 4 days | +19.5% | 10/10 | Bellock |
| 2 | Quantum Cryptography & Computing | recurred after 4 days | +18.1% | 10/10 | Finetek |
| 3 | Battery | 2 days running | +17.1% | 10/10 | Finetek |
| 4 | Semiconductor Majors (Fabrication) | recurred after 4 days | +10.9% | 2/2 | DB HiTek |
| 5 | Semiconductor Equipment | 7 days running | +10.5% | 10/10 | Jusung Engineering |
| 6 | Defense & War | 2 days running | +9.9% | 10/10 | Haein |
| 7 | COVID (Diagnostics, Treatments, Vaccines) | 3 days running | +9.3% | 9/9 | GeneOne Life Science |
| 8 | EV | recurred after 13 days | +9.2% | 10/10 | Sangsinenergydisplayprecision |
Theme by Theme
1. Cybersecurity (recurred after 4 days)
- Episode: started 2026-04-20, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
Bellock 424760 | +30.0% | 1,825 | ★ |
Dream Security 203650 | +30.0% | 3,880 | |
SGA Solutions 184230 | +29.9% | 1,046 | |
Ranix 317120 | +20.7% | 3,205 | |
Hancom WITH 054920 | +15.5% | 7,090 | |
NanoSilikhan Advanced Materials 286750 | +15.4% | 1,667 | |
Softcamp 258790 | +15.0% | 1,970 | |
RaonSecure 042510 | +14.7% | 15,410 | |
Aton 158430 | +12.5% | 9,910 | |
Openbase 049480 | +11.5% | 3,485 |
2. Quantum Cryptography & Computing (recurred after 4 days)
- Episode: started 2026-04-20, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
Finetek 131760 | +30.0% | 1,573 | ★ |
Dream Security 203650 | +30.0% | 3,880 | |
Korea Computer & Systems 115500 | +29.9% | 23,100 | |
Ranix 317120 | +20.7% | 3,205 | |
Hancom WITH 054920 | +15.5% | 7,090 | |
RaonSecure 042510 | +14.7% | 15,410 | |
Aton 158430 | +12.5% | 9,910 | |
MSDI 123010 | +10.2% | 1,883 | |
Axgate 356680 | +9.7% | 16,440 | |
Woori-Net 115440 | +7.5% | 16,030 |
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3. Battery (2 days running)
- Episode: started 2026-04-17, day 6
| Stock | Change | Close | Leader |
|---|---|---|---|
Finetek 131760 | +30.0% | 1,573 | ★ |
Jeio 418550 | +26.4% | 11,730 | |
Sangsinenergydisplayprecision 091580 | +20.2% | 27,350 | |
Samjin LND 054090 | +18.6% | 1,326 | |
Mi 059090 | +17.0% | 24,050 | |
MKElectron 033160 | +13.9% | 26,700 | |
Axbis 0011A0 | +13.6% | 25,550 | |
Soulbrain Holdings 036830 | +11.9% | 61,000 | |
Philoptics 161580 | +10.1% | 48,750 | |
Koses 089890 | +9.1% | 34,900 |
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4. Semiconductor Majors (Fabrication) (recurred after 4 days)
- Episode: started 2026-04-20, day 2
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- [장중수급포착] DB하이텍, 외국인/기관 동시 순매수… 주가 +13.66% — 뉴스핌 (Korean)
5. Semiconductor Equipment (7 days running)
- Episode: started 2026-04-10, day 18
| Stock | Change | Close | Leader |
|---|---|---|---|
Jusung Engineering 036930 | +30.0% | 91,500 | ★ |
The Codi 224060 | +22.4% | 6,400 | |
Koses 089890 | +9.1% | 34,900 | |
Imt 451220 | +8.4% | 15,550 | |
HanaMicron 067310 | +7.3% | 38,700 | |
Hanwha Vision 489790 | +7.1% | 84,900 | |
LOTVacuum 083310 | +6.3% | 16,930 | |
Green Optics 0015G0 | +5.4% | 33,250 | |
Green Resource 402490 | +4.6% | 21,450 | |
Innotech 469610 | +4.6% | 22,850 |
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6. Defense & War (2 days running)
- Episode: started 2026-04-17, day 4
| Stock | Change | Close | Leader |
|---|---|---|---|
Haein 003010 | +29.9% | 8,030 | ★ |
Firstec 010820 | +16.5% | 15,700 | |
HanilForgingIndustrial 024740 | +11.0% | 3,895 | |
RFHIC 218410 | +8.0% | 100,800 | |
WaveElectronics 095270 | +6.3% | 9,640 | |
RF Materials 327260 | +5.8% | 106,800 | |
RF Systems 474610 | +5.5% | 15,770 | |
Green Optics 0015G0 | +5.4% | 33,250 | |
LIG Defense&Aerospace 079550 | +5.1% | 921,000 | |
STX Engine 077970 | +5.0% | 46,200 |
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7. COVID (Diagnostics, Treatments, Vaccines) (3 days running)
- Episode: started 2026-04-16, day 5
| Stock | Change | Close | Leader |
|---|---|---|---|
GeneOne Life Science 011000 | +30.0% | 1,322 | ★ |
NanoSilikhan Advanced Materials 286750 | +15.4% | 1,667 | |
Celemics 331920 | +11.0% | 17,740 | |
Cellid 299660 | +7.7% | 4,110 | |
SV Investment 289080 | +6.4% | 4,330 | |
Genomictree 228760 | +4.3% | 18,510 | |
Hyundai Bioscience 048410 | +3.4% | 14,910 | |
Inventage Lab 389470 | +3.0% | 64,400 | |
Sugentech 253840 | +2.8% | 6,950 |
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8. EV (recurred after 13 days)
- Episode: started 2026-04-20, day 1
| Stock | Change | Close | Leader |
|---|---|---|---|
Sangsinenergydisplayprecision 091580 | +20.2% | 27,350 | ★ |
Axbis 0011A0 | +13.6% | 25,550 | |
Samyoung 003720 | +13.5% | 9,650 | |
HanilForgingIndustrial 024740 | +11.0% | 3,895 | |
Kostecsys 355150 | +8.4% | 21,050 | |
HBL 452190 | +6.8% | 6,730 | |
Neotechnicalsystem 085910 | +6.6% | 27,500 | |
Samsung SDI 006400 | +4.9% | 538,000 | |
Cosmo Advanced Materials & Technology 005070 | +3.9% | 59,300 | |
Seojin System 178320 | +3.2% | 51,800 |
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Closing Thoughts
Cybersecurity and Quantum Cryptography & Computing both came back after a gap of 4 days. The next point to track is whether either theme lasts beyond a one-day episode.
COVID (Diagnostics, Treatments, Vaccines) is on a streak of 3, with GeneOne Life Science up 29.99%. EV came back after a gap of 13 days with an average change of 9.2%.