May 20: 5 Strong Themes — COVID (Diagnostics, Treatments, Vaccines), Vaccines, Diagnostics & Epidemic Control
5 strong themes — 2 running · 3 recurred. Top: COVID (Diagnostics, Treatments, Vaccines) +12.7%.
Average change by strong theme
Theme leaders · recent trend
| Theme | Leader | Change | Trend |
|---|---|---|---|
| COVID (Diagnostics, Treatments, Vaccines) | GC Medical Science | +28.19% | |
| Vaccines, Diagnostics & Epidemic Control | EyeGene | +29.79% | |
| Telecom Equipment | Inno Instrument | +29.80% | |
| 5G | Inno Instrument | +29.80% | |
| Optical Communications | Lightron Fiber-optic Devices | +11.50% |
On May 20, health-related themes led the session. COVID (Diagnostics, Treatments, Vaccines) posted an average change of 12.7%, with all 10 stocks higher.
EyeGene rose 29.79% and leader GC Medical Science gained 28.19%. Vaccines, Diagnostics & Epidemic Control extended its streak to 2 days with an average change of 9.09%.
Telecom Equipment returned after a 13-day gap with an average change of 8.22%. Leader Inno Instrument jumped 29.8%, also leading 5G, which averaged 8.16%.
Today’s Strong Themes at a Glance
| # | Theme | Status | Avg. change | Up/Total | Leader |
|---|---|---|---|---|---|
| 1 | COVID (Diagnostics, Treatments, Vaccines) | 2 days running | +12.7% | 10/10 | GC Medical Science |
| 2 | Vaccines, Diagnostics & Epidemic Control | 2 days running | +9.1% | 10/10 | EyeGene |
| 3 | Telecom Equipment | recurred after 13 days | +8.2% | 10/10 | Inno Instrument |
| 4 | 5G | recurred after 13 days | +8.2% | 10/10 | Inno Instrument |
| 5 | Optical Communications | recurred after 13 days | +6.6% | 7/7 | Lightron Fiber-optic Devices |
Theme by Theme
1. COVID (Diagnostics, Treatments, Vaccines) (2 days running)
- Episode: started 2026-05-19, day 2
| Stock | Change | Close | Leader |
|---|---|---|---|
EyeGene 185490 | +29.8% | 2,235 | |
GC Medical Science 142280 | +28.2% | 6,230 | ★ |
GeneOne Life Science 011000 | +19.6% | 1,634 | |
Sugentech 253840 | +15.1% | 7,630 | |
Cellid 299660 | +7.6% | 3,130 | |
LabGenomics 084650 | +7.0% | 1,370 | |
Genematrix 109820 | +6.6% | 2,090 | |
Access Bio 950130 | +6.3% | 3,550 | |
ZGOO Holdings 221800 | +4.4% | 12,540 | |
HLB Genex 187420 | +2.4% | 2,325 |
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2. Vaccines, Diagnostics & Epidemic Control (2 days running)
- Episode: started 2026-05-19, day 2
| Stock | Change | Close | Leader |
|---|---|---|---|
EyeGene 185490 | +29.8% | 2,235 | ★ |
GeneOne Life Science 011000 | +19.6% | 1,634 | |
Sugentech 253840 | +15.1% | 7,630 | |
LabGenomics 084650 | +7.0% | 1,370 | |
Genematrix 109820 | +6.6% | 2,090 | |
Access Bio 950130 | +6.3% | 3,550 | |
GC 005250 | +4.5% | 16,370 | |
Bioneercorporation 064550 | +1.4% | 10,050 | |
Yuhan 000100 | +0.2% | 81,500 | |
Hwail Pharm 061250 | +0.2% | 8,620 |
Related news
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3. Telecom Equipment (recurred after 13 days)
- Episode: started 2026-05-20, day 3
| Stock | Change | Close | Leader |
|---|---|---|---|
Inno Instrument 215790 | +29.8% | 2,265 | ★ |
Korea Advanced Materials 062970 | +12.5% | 2,745 | |
Lightron Fiber-optic Devices 069540 | +11.5% | 5,140 | |
VISSEM Electronics 072950 | +7.7% | 14,080 | |
Wooriro 046970 | +6.6% | 8,360 | |
HFR 230240 | +6.1% | 30,450 | |
Kisan Telecom 035460 | +3.0% | 3,480 | |
Mercury 100590 | +2.6% | 7,200 | |
OE Solutions 138080 | +1.4% | 36,600 | |
Woori-Net 115440 | +1.0% | 12,630 |
4. 5G (recurred after 13 days)
- Episode: started 2026-05-20, day 3
| Stock | Change | Close | Leader |
|---|---|---|---|
Inno Instrument 215790 | +29.8% | 2,265 | ★ |
Korea Advanced Materials 062970 | +12.5% | 2,745 | |
Lightron Fiber-optic Devices 069540 | +11.5% | 5,140 | |
Wooriro 046970 | +6.6% | 8,360 | |
TAIHAN Fiberoptics 010170 | +6.3% | 22,900 | |
HFR 230240 | +6.1% | 30,450 | |
Telcoware 078000 | +3.4% | 15,280 | |
Kisan Telecom 035460 | +3.0% | 3,480 | |
OE Solutions 138080 | +1.4% | 36,600 | |
Woori-Net 115440 | +1.0% | 12,630 |
Related news
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5. Optical Communications (recurred after 13 days)
- Episode: started 2026-05-20, day 3
| Stock | Change | Close | Leader |
|---|---|---|---|
Korea Advanced Materials 062970 | +12.5% | 2,745 | |
Sungho Electronics 043260 | +11.6% | 39,400 | |
Lightron Fiber-optic Devices 069540 | +11.5% | 5,140 | ★ |
TAIHAN Fiberoptics 010170 | +6.3% | 22,900 | |
Mercury 100590 | +2.6% | 7,200 | |
Woori-Net 115440 | +1.0% | 12,630 | |
RF Materials 327260 | +0.8% | 94,500 |
Closing Thoughts
The telecom episodes run from May 20 to May 22, spanning 3 days. Optical Communications, led by Lightron Fiber-optic Devices, averaged 6.6% with all 7 stocks up.
Health news cited infection-spread concerns and a government hantavirus vaccine project for EyeGene. Whether the 2-day streak continues is the next thing the data will show.