KOSPI surges on Samsung SDI cash boost and construction order optimism

The KOSPI jumped 1.75% to 6,927.08 while the KOSDAQ rose 1.16% to 836.49, reflecting a broadly bullish midday session. Strong corporate news, especially around Samsung SDI's cash infusion and Daewoo Engineering's order outlook, lifted market sentiment despite a modest USD/KRW at 1,383.12.

SAMSUNG SDI CO.,LTD. (006400) +9.69%

SAMSUNG SDI CO.,LTD. chart

Price now₩566,000
Prev close₩516,000
Change+9.69%
Mkt cap₩45.6T
P/E-67.99
P/B2.08
EPS₩-8,325
ROE0.17%
Debt ratio77.45%
52W range₩196,800–723,000

Analyst consensus — 22 ratings, last 180 days · avg target ₩717,364

Buy21
Hold1
Sell0

Samsung SDI rallied 9.69% after announcing the sale of its Samsung Display stake, securing roughly 4‑4.5 trillion KRW in cash, which investors view as a catalyst for balance‑sheet improvement and future growth investments. The cash influx is expected to strengthen financial flexibility, while expanding demand for energy‑storage systems and AI‑related applications offsets a weak EV market, further supporting the price surge. The market reaction was captured in multiple reports highlighting the stake sale and the upbeat demand outlook.

DaewooEngineering&Construction (047040) +6.02%

DaewooEngineering&Construction chart

Price now₩20,200
Prev close₩19,100
Change+5.76%
Mkt cap₩8.3T
P/E-9.2
P/B2.48
EPS₩-2,195
ROE-14.26%
Debt ratio266.54%
52W range₩3,320–40,350

Analyst consensus — 16 ratings, last 180 days · avg target ₩22,700

Buy14
Hold2
Sell0

Daewoo Engineering climbed 6.02% on heightened expectations of large new contracts across housing, nuclear and LNG projects, which bolstered investor confidence. Analysts sharply raised the target price from 7,300 KRW to 22,000 KRW, a 204% increase, amplifying buying pressure. Subsequent coverage confirmed the stock’s upward trajectory, reinforcing the optimism generated by the revised forecasts and order pipeline. These factors collectively drove the midday rally in the construction sector.

SIMMTECH Co., Ltd. (222800) +13.22%

SIMMTECH Co., Ltd. chart

Price now₩127,600
Prev close₩112,700
Change+13.22%
Mkt cap₩4.8T
P/E-25.75
P/B8.28
EPS₩-4,955
ROE-9.33%
Debt ratio183.10%
52W range₩24,000–164,200

Analyst consensus — 10 ratings, last 180 days · avg target ₩163,500

Buy10
Hold0
Sell0

SIMMTECH surged 13.22% after the company announced an expansion of its SOCAMM equipment line, prompting a target‑price upgrade to 190,000 KRW, which lifted investor expectations. However, Hana Securities warned that a 270 billion KRW facility investment could dilute share value in the short term, injecting a note of caution into market sentiment. The contrasting views were reflected in coverage that highlighted both the upside from capacity expansion and the potential dilution risk.

LS ELECTRIC (010120) +7.07%

LS ELECTRIC chart

Price now₩215,000
Prev close₩201,500
Change+6.70%
Mkt cap₩32.2T
P/E112.51
P/B15.45
EPS₩1,911
ROE19.31%
Debt ratio172.12%
52W range₩148,000–907,000

Analyst consensus — 15 ratings, last 180 days · avg target ₩293,000

Buy15
Hold0
Sell0

LS ELECTRIC rose 7.07% following the signing of a large‑scale contract that pushed the stock into the 200,000 KRW range, delivering a 3%‑plus gain. Simultaneously, foreign and institutional investors executed net buying, adding another 5.46% to the price action. The company’s product portfolio—featuring a three‑stage AC‑to‑DC conversion and short‑lead‑time delivery in distribution and transmission—received positive market appraisal, reinforcing the bullish momentum.

HYOSUNG HEAVY INDUSTRIES (298040) +9.33%

HYOSUNG HEAVY INDUSTRIES chart

Price now₩3,059,000
Prev close₩2,797,000
Change+9.37%
Mkt cap₩28.5T
P/E54.87
P/B12.11
EPS₩55,755
ROE25.34%
Debt ratio213.51%
52W range₩1,185,000–4,742,000

Analyst consensus — 14 ratings, last 180 days · avg target ₩4,304,286

Buy14
Hold0
Sell0

Hyosung Heavy Industries advanced 9.33% after a securities firm praised its superior transmission capabilities, boosting sentiment. The stock also benefited from expectations of rising U.S. power‑grid and AI data‑center demand, as domestic manufacturers stand to gain from recent bans on foreign‑made power equipment. Additionally, transformer peers have logged a 3,000% rise over the past two years, fueling speculation of a renewed upswing for the sector.

Sources

  1. 삼성SDI 주가 장중 8%대 올라, 삼성디스플레이 보유지분 팔아 4조 실탄 확보 — 비즈니스포스트 · 2026-08-27
  2. [특징주] 삼성SDI, 4.5조원 SDC 주식 처분.. 5%대 '강세' — 글로벌이코노믹 · 2026-08-27
  3. [특징주] '삼성D 지분 매각' 삼성SDI, 8%↑…이차전지주도 강세 — 연합뉴스 · 2026-08-24
  4. [ET특징주] 삼성SDI, 삼성디스플레이 지분 매각 발표…주가 7%↑ — 전자신문 · 2026-08-24
  5. 삼성전자 주가 6% 빠지는데…삼성SDI 나홀로 8% 급등 [종목Pick] — 헤럴드경제 · 2026-08-24
  6. 삼성SDI, 주가 반등에 수급 양호...EV 부진 딛고 ESS·AI 수요 확대 — 증권일보 · 2026-08-26
  7. “대규모 수주 기대감”…대우건설 목표가 7300원 → 2만2000원 [오늘 나온 보고서] — 매일경제 · 2026-08-25
  8. 대우건설 주가, 8월 24일 장중 15,910원 0.13% 하락 — 톱스타뉴스 · 2026-08-24
  9. 한화證 대우건설, 신규수주·주택 개선에 원전·LNG 기대…목표주가 204%↑ — 아주경제 · 2026-08-25
  10. "과도한 주가 조정" 삼성전자, 목표주가 37만원…대우건설, 대규모 신규 수주 자신감 [株토피아] — 파이낸셜뉴스 · 2026-08-26
  11. 대우건설 주가 상승 중 — 아시아뉴스통신 · 2026-08-27
  12. [대우건설 주가전망] [긴급] 완벽히 속았네요.. 건설 세력들 대거 검거 완료! 세력들의 금일 전략 완벽분석! 필수시청 -6월22일 방송 Ryan Johnson (q7bsaNJUAU) — Mshale · 2026-08-26
  13. 목표주가 19만원 심텍, SOCAMM 증설에 승부수 — 중기이코노미 · 2026-08-26
  14. 심텍 주가, 갑작스런 급등세... 무슨 회사길래? — 금강일보 · 2026-08-24
  15. 심텍 주가, 8월 25일 장중 107,800원 2.47% 상승 — 톱스타뉴스 · 2026-08-25
  16. 심텍 주가, 웃음꽃 활짝... 왜? — 금강일보 · 2026-08-27
  17. 하나證 “심텍 2700억 시설 투자, 단기적으로 주식가치 희석 불가피” - 조선비즈 — Chosunbiz · 2026-08-25
  18. 심텍(222800) — 매일경제 마켓 · 2026-08-24
  19. LS ELECTRIC 주가, 8월 26일 장중 197,900원 1.28% 상승 — 톱스타뉴스 · 2026-08-26
  20. [장중수급포착] LS ELECTRIC, 외국인/기관 동시 순매수… 주가 +5.46% — 뉴스핌 · 2026-08-27
  21. LS ELECTRIC 주가, 8월 25일 장중 186,500원 3.02% 하락 — 톱스타뉴스 · 2026-08-25
  22. LS ELECTRIC, 대규모 계약에 3%대 강세 마감…20만원대 안착 : 기업주식정보 — 재경일보 · 2026-08-26
  23. LS ELECTRIC 주가, 8월 24일 장중 191,900원 2.62% 상승 — 톱스타뉴스 · 2026-08-24
  24. LS ELECTRIC, 배전·송전, 교류→직류 '삼단구조'에 단납기 강점까지-SK — 인포스탁데일리 · 2026-08-23
  25. 2년간 3,000% 상승한 변압기 관련주, 효성중공업 주가 전망 : 다시 상승세로 돌아설까? — 네이버 프리미엄콘텐츠 · 2026-08-23
  26. 효성중공업 주가, 8월 26일 장중 2,766,000원 0.40% 상승 — 톱스타뉴스 · 2026-08-26
  27. 효성중공업, '잘하는 송전을 더 잘하고 있다' 증권사 발표에 강세 — 매일경제 마켓 · 2026-08-24
  28. 미국 전력망 이어 AI 데이터센터 정조준…효성중공업 주가 기대감 커진다 — 핀포인트뉴스 · 2026-08-24
  29. [특징주] '전력기기주' 효성중공업, 美 외국산 금지조치 영향 '상승' — 전국매일신문 · 2026-08-27
  30. 효성중공업 주가, 8월 27일 장중 2,927,000원 4.65% 상승세 — 톱스타뉴스 · 2026-08-27

This is market commentary, not investment advice.