KOSPI Plummets Over 2% Midday as Tech and Defense Stocks Diverge

The Korean equity markets faced heavy selling pressure by midday, with the benchmark KOSPI dropping 2.37% to 6,745.98 and the KOSDAQ declining 0.86% to 813.62. The USD/KRW exchange rate hovered at 1,343.03, reflecting heightened market volatility despite strong individual performances in the defense and semiconductor sectors.

AUK (017900) +30.00%

AUK surged to hit its daily limit of +30.00% during the session [3]. The stock experienced an early spike that triggered a volatility interruption (VI) mechanism [1], with intraday gains expanding from 14.05% to 19.11% on September 14 [2, 4]. Despite the dramatic price movement, the specific business developments or positive catalysts driving this rally remain unconfirmed, as the available headlines only record the stock's price action [1, 2, 3, 4].

LIGHTRON FIBER-OPTIC DEVICES (069540) +14.47%

Lightron Fiber-Optic Devices rose +14.47%, although available midday headlines only noted an intraday gain of 5.43% to 4,080 KRW on September 14 [5]. The specific underlying catalysts, business developments, or positive news driving the stock's double-digit gains remain unconfirmed from the provided information [5]. Consequently, the fundamental reasons for this sharp upward movement cannot be verified [5].

HANWHA AEROSPACE (012450) +4.53%

Hanwha Aerospace climbed +4.53% amid strong market optimism [7]. Investor sentiment was bolstered by the export of the Chunmoo rocket system to Croatia, K9 howitzer prospects in the US, and expectations of additional European Chunmoo orders [8, 11]. Analysts highlighted that the defense contractor has established a long-term export foundation rather than relying on short-term contracts [6]. Some market analysts even projected a target price of up to 2,000,000 KRW [11].

DB HiTek Co.,LTD (000990) +4.73%

DB HiTek gained +4.73%, supported by a seven-day consecutive net buying streak from institutional investors [13]. The stock has risen 21% over the past month, driven by a doubling of orders for legacy semiconductors [16]. While the stock previously suffered a sharp weekly drop to the 100,000 KRW level, including an 8.16% decline on September 11, the exact reasons for that correction remain unconfirmed [12, 15].

KOLMAR KOREA (161890) +4.88%

Kolmar Korea advanced +4.88%, propelled by concurrent net buying from both foreign and institutional investors [18]. Sentiment was further lifted by a report from Sangsangin Securities, which set a target price of 170,000 KRW and noted that the company's order books remain completely full even as it expands its production facilities [21]. Other specific factors influencing the stock's upward movement remain unconfirmed.

Sources

1. [속보] 광전자 VI 발동, 주가 장초반부터 급등 — CBC뉴스 · 2026-09-14
2. 광전자 주가, 9월 14일 장중 9,410원 19.11% 상승 — 중앙이코노미뉴스 · 2026-09-14
3. 광전자, 상한가 진입.. +30.00% ↑ — 서울경제 · 2026-09-14
4. 광전자 주가, 9월 14일 장중 9,010원 14.05% 상승 — topstarnews.net · 2026-09-14
5. 빛과전자 주가, 9월 14일 장중 4,080원 5.43% 상승 — topstarnews.net · 2026-09-14
6. “한화에어로스페이스, 단기수주 넘어 장기 수출 기반 마련” — v.daum.net · 2026-09-13
7. 한화에어로스페이스 주가 상승 중 — 아시아뉴스통신 · 2026-09-14
8. 한화에어로스페이스, 천무 크로아티아 수출…K9 미국 진출까지 ,주가 주목 — CBC뉴스 · 2026-09-10
9. 한화에어로스페이스 주가, 9월 11일 장중 1,079,000원 1.12% 상승 — 중앙이코노미뉴스 · 2026-09-11
10. 한화에어로스페이스 주가, 9월 11일 1,081,000원 1.31% 상승 마감 — topstarnews.net · 2026-09-11
11. 200만원 간다는 한화에어로스페이스…유럽서 '천무' 추가 수주 기대[애널리스트의 시각] — v.daum.net · 2026-09-13
12. DB하이텍 주가, 9월 11일 105,800원 8.16% 하락 마감 — topstarnews.net · 2026-09-11
13. [장중수급포착] DB하이텍, 기관 7일 연속 순매수행진... 주가 +7.47% — 뉴스핌 · 2026-09-14
14. DB하이텍 주가, 9월 10일 115,200원 3.32% 상승 마감 — topstarnews.net · 2026-09-10
15. 9월 2주차 DB하이텍 주가, 10만원대 급락 마감 — topstarnews.net · 2026-09-12
16. “구형 반도체라고 무시했는데, 주문 2배 폭주”…한달새 21% 뛴 DB하이텍 [이주의 Bull기둥] — 매일경제 · 2026-09-12
17. 한국콜마 주가, 9월 11일 141,300원 1.36% 상승 마감 — topstarnews.net · 2026-09-11
18. [장중수급포착] 한국콜마, 외국인/기관 동시 순매수… 주가 +1.22% — 뉴스핌 · 2026-09-11
19. 한국콜마 주가, 9월 11일 장중 140,600원 0.86% 상승 — 중앙이코노미뉴스 · 2026-09-11
20. 한국콜마 주가, 9월 10일 139,400원 0.64% 하락 마감 — topstarnews.net · 2026-09-10
21. [리포트 브리핑]한국콜마, '늘려도 주문이 찬다' 목표가 170,000원 - 상상인증권 — 뉴스핌 · 2026-09-14
22. 한국콜마 투자분석 2026. 09. 10 — 주달 · 2026-09-10

This is market commentary, not investment advice.