TAIHAN Fiberoptics (KRX: 010170)
Who is buying TAIHAN Fiberoptics?
Between Sep 10, 2026 and Oct 13, 2026 (20 trading sessions), foreign investors net bought ₩10.2bn ($8M) of TAIHAN Fiberoptics, the 40th largest foreign net purchase among 1828 KOSDAQ stocks. Institutions net bought ₩4.6bn ($3M) and retail investors net sold ₩16.5bn ($12M) over the same window. Foreigners were net buyers on 6 of the 20 sessions.
Foreign investors hold 3.43% of TAIHAN Fiberoptics' listed shares (KRX ownership data as of Oct 13, 2026), up from 1.55% twenty sessions earlier and 4.87% a year ago.
The stock closed at ₩14,670 on Oct 13, 2026: -1.94% over 20 sessions, +588.09% year-to-date, +1,021.56% over one year. The 52-week range is ₩1,219 – ₩31,500.
At ₩14,670 the stock trades at 586.80× current-fiscal-year consensus earnings.
View chart data as a table
| Date | Close | Foreign net | Institutions | Retail |
|---|---|---|---|---|
| 2026-10-13 | ₩14,670 | ₩-0.7bn | ₩-0.2bn | +₩0.9bn |
| 2026-10-12 | ₩15,720 | ₩-1.3bn | ₩-2.3bn | +₩3.5bn |
| 2026-10-08 | ₩16,970 | ₩-12.8bn | ₩-4.6bn | +₩17.3bn |
| 2026-10-07 | ₩17,940 | ₩-26.2bn | ₩-0.4bn | +₩26.5bn |
| 2026-10-06 | ₩18,530 | +₩32.6bn | +₩0.7bn | ₩-33.1bn |
| 2026-10-02 | ₩17,800 | +₩8.9bn | ₩-1.0bn | ₩-8.7bn |
| 2026-10-01 | ₩17,000 | +₩0.9bn | ₩-1.4bn | +₩0.7bn |
| 2026-09-30 | ₩16,680 | ₩-17.5bn | +₩0.2bn | +₩17.6bn |
| 2026-09-29 | ₩16,600 | ₩-8.1bn | ₩-1.3bn | +₩9.1bn |
| 2026-09-28 | ₩17,280 | ₩-11.1bn | +₩0.7bn | +₩10.1bn |
| 2026-09-23 | ₩17,700 | ₩-14.8bn | ₩-0.1bn | +₩14.6bn |
| 2026-09-22 | ₩17,810 | ₩-21.2bn | ₩-0.0bn | +₩20.4bn |
| 2026-09-21 | ₩17,720 | ₩-45.6bn | +₩0.3bn | +₩43.5bn |
| 2026-09-18 | ₩18,320 | +₩90.9bn | +₩8.2bn | ₩-97.0bn |
| 2026-09-17 | ₩16,130 | ₩-9.1bn | +₩0.4bn | +₩8.0bn |
| 2026-09-16 | ₩16,100 | +₩68.8bn | +₩1.9bn | ₩-69.9bn |
| 2026-09-15 | ₩14,140 | +₩1.5bn | +₩0.2bn | ₩-0.9bn |
| 2026-09-14 | ₩14,490 | ₩-2.4bn | +₩0.3bn | +₩2.3bn |
| 2026-09-11 | ₩14,150 | ₩-13.8bn | ₩-0.7bn | +₩14.6bn |
| 2026-09-10 | ₩14,740 | ₩-8.7bn | +₩3.7bn | +₩4.0bn |
| 2026-09-09 | ₩14,960 | +₩30.6bn | +₩1.3bn | ₩-30.8bn |
| 2026-09-08 | ₩13,700 | ₩-9.3bn | +₩0.6bn | +₩8.7bn |
| 2026-09-07 | ₩13,470 | +₩1.1bn | ₩-0.1bn | ₩-1.3bn |
| 2026-09-04 | ₩13,010 | ₩-1.9bn | ₩-0.5bn | +₩2.3bn |
| 2026-09-03 | ₩12,850 | ₩-7.0bn | ₩-0.4bn | +₩6.2bn |
| 2026-09-02 | ₩13,570 | +₩0.5bn | +₩0.0bn | ₩-0.2bn |
| 2026-09-01 | ₩13,310 | ₩-7.8bn | ₩-0.6bn | +₩8.2bn |
| 2026-08-31 | ₩13,960 | ₩-8.9bn | ₩-0.1bn | +₩9.2bn |
| 2026-08-28 | ₩14,310 | ₩-23.4bn | ₩-0.8bn | +₩23.0bn |
| 2026-08-27 | ₩14,860 | +₩46.7bn | +₩1.2bn | ₩-47.5bn |
| 2026-08-26 | ₩13,500 | ₩-22.7bn | +₩0.8bn | +₩21.4bn |
| 2026-08-25 | ₩13,500 | +₩2.4bn | +₩0.1bn | ₩-2.5bn |
| 2026-08-24 | ₩13,150 | +₩14.6bn | +₩0.1bn | ₩-14.5bn |
| 2026-08-21 | ₩12,120 | ₩-1.8bn | ₩-0.5bn | +₩2.2bn |
| 2026-08-20 | ₩12,650 | +₩0.2bn | ₩-0.4bn | ₩-0.1bn |
| 2026-08-19 | ₩12,700 | ₩-0.7bn | ₩-0.4bn | +₩0.7bn |
| 2026-08-18 | ₩12,890 | ₩-5.8bn | ₩-0.7bn | +₩6.3bn |
| 2026-08-14 | ₩13,370 | +₩2.6bn | ₩-0.3bn | ₩-1.8bn |
| 2026-08-13 | ₩13,240 | ₩-0.8bn | ₩-2.4bn | +₩3.7bn |
| 2026-08-12 | ₩13,510 | ₩-10.2bn | +₩0.6bn | +₩9.0bn |
| 2026-08-11 | ₩13,450 | ₩-5.4bn | ₩-0.7bn | +₩6.3bn |
| 2026-08-10 | ₩14,040 | +₩15.1bn | +₩8.1bn | ₩-22.7bn |
| 2026-08-07 | ₩11,460 | ₩-21.3bn | ₩-2.2bn | +₩21.3bn |
| 2026-08-06 | ₩11,070 | ₩-11.4bn | ₩-2.4bn | +₩13.9bn |
| 2026-08-05 | ₩12,070 | ₩-43.5bn | +₩11.8bn | +₩31.3bn |
| 2026-08-04 | ₩10,180 | ₩-1.3bn | +₩0.5bn | +₩0.7bn |
| 2026-08-03 | ₩9,250 | ₩-0.6bn | ₩-0.1bn | +₩0.5bn |
| 2026-07-31 | ₩8,530 | +₩6.0bn | +₩0.3bn | ₩-6.4bn |
| 2026-07-30 | ₩7,160 | ₩-0.9bn | +₩0.1bn | +₩0.9bn |
| 2026-07-29 | ₩7,450 | +₩16.4bn | +₩0.3bn | ₩-16.7bn |
| 2026-07-28 | ₩8,450 | ₩-0.5bn | +₩0.4bn | +₩0.2bn |
| 2026-07-27 | ₩9,740 | ₩-2.6bn | ₩-0.1bn | +₩2.7bn |
| 2026-07-24 | ₩9,920 | ₩-13.9bn | ₩-0.0bn | +₩13.8bn |
| 2026-07-23 | ₩10,840 | +₩7.8bn | +₩0.1bn | ₩-7.8bn |
| 2026-07-22 | ₩10,090 | +₩8.0bn | +₩0.1bn | ₩-8.0bn |
| 2026-07-21 | ₩9,860 | +₩3.6bn | +₩0.8bn | ₩-4.2bn |
| 2026-07-20 | ₩9,460 | +₩5.5bn | +₩0.0bn | ₩-5.5bn |
| 2026-07-16 | ₩10,300 | ₩-7.9bn | ₩-0.9bn | +₩8.3bn |
| 2026-07-15 | ₩11,680 | +₩1.7bn | +₩0.1bn | ₩-1.8bn |
| 2026-07-14 | ₩11,050 | ₩-4.3bn | +₩0.4bn | +₩3.8bn |
| 2026-07-13 | ₩10,910 | ₩-18.2bn | ₩-0.4bn | +₩18.2bn |
Investor flows summary
| Window | Foreign | (USD) | Institutions | Retail |
|---|---|---|---|---|
| 1 day | ₩-0.7bn | $-1M | ₩-0.2bn | +₩0.9bn |
| 5 days | ₩-8.5bn | $-6M | ₩-6.8bn | +₩15.1bn |
| 20 days | +₩10.2bn | +$8M | +₩4.6bn | ₩-16.5bn |
Positive = net buying, negative = net selling. Values aggregate the KRX main board and the NXT alternative venue.
Frequently asked questions
Are foreign investors buying TAIHAN Fiberoptics stock?
Over the last 5 sessions foreign investors net sold ₩8.5bn ($6M) of TAIHAN Fiberoptics; over 60 sessions they net sold ₩40.6bn ($30M); since Jan 1, 2026 they net sold ₩175.8bn ($132M). Over 20 sessions the stock is the 40th largest foreign net purchase among 1828 KOSDAQ stocks.
How much of TAIHAN Fiberoptics do foreign investors own?
Foreign investors own 3.43% of TAIHAN Fiberoptics' shares as of Oct 13, 2026, versus 4.87% one year earlier. The figure is KRX's daily foreign holdings divided by listed shares, and it reflects trades settled through the previous session.
Who is on the other side — institutions or retail investors?
Over 20 sessions institutions net bought ₩4.6bn ($3M) and retail investors net sold ₩16.5bn ($12M) of TAIHAN Fiberoptics. Retail investors have been supplying the shares that foreigners and institutions are buying.
Is TAIHAN Fiberoptics listed on KOSPI or KOSDAQ?
TAIHAN Fiberoptics (대한광통신) trades on KOSDAQ under KRX code 010170 in the Infrastructure group, with a market capitalization of ₩2T ($1.7B). Daily net flows by investor type are published by KRX after each session and combine the KRX main board with the NXT venue.
Annual financials
| Fiscal year | Revenue | YoY | Operating profit | Net income |
|---|---|---|---|---|
| 2023 | ₩180bn ($135M) | – | -₩23bn (-$17M) | -₩29bn (-$22M) |
| 2024 | ₩153bn ($115M) | -15.30% | -₩30bn (-$22M) | -₩56bn (-$42M) |
| 2025 | ₩139bn ($105M) | -8.70% | -₩21bn (-$16M) | -₩28bn (-$21M) |
Consolidated (K-IFRS) where available, from DART regulatory filings. USD figures converted at the current rate (₩1333.09/$) for reference only.