Mar 23: 4 Strong Themes — Plastic Alternatives & Biodegradables, Telecom Equipment
4 strong themes — 3 running · 1 recurred. Top: Plastic Alternatives & Biodegradables +18.5%.
Average change by strong theme
Theme leaders · recent trend
| Theme | Leader | Change | Trend |
|---|---|---|---|
| Plastic Alternatives & Biodegradables | Samryoong | +29.92% | |
| Telecom Equipment | Oneul E&m | +29.97% | |
| 5G | Oneul E&m | +29.97% | |
| Optical Communications | Lightron Fiber-optic Devices | +29.91% |
On Mar 23, four themes rallied and every listed stock in them closed higher. Plastic Alternatives & Biodegradables led with an average change of 18.5%, returning after a 96-day gap.
Telecom Equipment rose for a third straight session, with an average change of 14.64% across 9 stocks. 5G followed at 14.33%, and Oneul E&m led both themes at 29.97%.
Optical Communications rose for a second straight session, with an average change of 9.98%. Its leader, Lightron Fiber-optic Devices, gained 29.91% on volume of 20096019 shares.
Today’s Strong Themes at a Glance
| # | Theme | Status | Avg. change | Up/Total | Leader |
|---|---|---|---|---|---|
| 1 | Plastic Alternatives & Biodegradables | recurred after 96 days | +18.5% | 6/6 | Samryoong |
| 2 | Telecom Equipment | 3 days running | +14.6% | 9/9 | Oneul E&m |
| 3 | 5G | 3 days running | +14.3% | 7/7 | Oneul E&m |
| 4 | Optical Communications | 2 days running | +10.0% | 6/6 | Lightron Fiber-optic Devices |
Theme by Theme
1. Plastic Alternatives & Biodegradables (recurred after 96 days)
- Episode: started 2026-03-23, day 2
| Stock | Change | Close | Leader |
|---|---|---|---|
Samryoong 014970 | +29.9% | 8,510 | ★ |
Ecoplastic 038110 | +29.9% | 3,910 | |
Serim B&G 340440 | +20.9% | 1,733 | |
Jinyoung 285800 | +13.8% | 1,684 | |
Hankuk Package 037230 | +9.4% | 2,100 | |
CTK 260930 | +7.0% | 4,175 |
2. Telecom Equipment (3 days running)
- Episode: started 2026-03-19, day 7
| Stock | Change | Close | Leader |
|---|---|---|---|
Oneul E&m 192410 | +30.0% | 3,925 | ★ |
Lightron Fiber-optic Devices 069540 | +29.9% | 2,845 | |
Wooriro 046970 | +29.9% | 3,520 | |
TMC 217590 | +18.4% | 27,950 | |
Joosung 109070 | +10.8% | 1,357 | |
Korea Advanced Materials 062970 | +8.2% | 2,710 | |
DASAN Networks 039560 | +2.4% | 5,110 | |
OptiCore 380540 | +2.0% | 4,225 | |
Woori-Net 115440 | +0.1% | 8,200 |
3. 5G (3 days running)
- Episode: started 2026-03-19, day 5
| Stock | Change | Close | Leader |
|---|---|---|---|
Oneul E&m 192410 | +30.0% | 3,925 | ★ |
Lightron Fiber-optic Devices 069540 | +29.9% | 2,845 | |
Wooriro 046970 | +29.9% | 3,520 | |
Korea Advanced Materials 062970 | +8.2% | 2,710 | |
OptiCore 380540 | +2.0% | 4,225 | |
Eluon 065440 | +0.2% | 2,215 | |
Woori-Net 115440 | +0.1% | 8,200 |
4. Optical Communications (2 days running)
- Episode: started 2026-03-20, day 6
| Stock | Change | Close | Leader |
|---|---|---|---|
Lightron Fiber-optic Devices 069540 | +29.9% | 2,845 | ★ |
TMC 217590 | +18.4% | 27,950 | |
Korea Advanced Materials 062970 | +8.2% | 2,710 | |
OptiCore 380540 | +2.0% | 4,225 | |
Fiberpro 368770 | +1.2% | 16,450 | |
Woori-Net 115440 | +0.1% | 8,200 |
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Closing Thoughts
Telecom Equipment and 5G have now run for three sessions, and Optical Communications for two. A Korea Economic Daily headline, “Jensen Huang’s One Remark Sends Optical Communication Stocks to Upper Limit”, ran alongside the optical rally.
Gains were uneven within themes. In Telecom Equipment, Woori-Net rose just 0.12% while Oneul E&m rose 29.97%. In Plastic Alternatives & Biodegradables, all 6 stocks rose, and CTK had the smallest gain at 7.05%.