KOSPI Surges Past 7,100 as Tech and Construction Shares Rally

The Korean markets showed strong upward momentum at midday, with the benchmark KOSPI surging 2.42% to 7,165.01 and the tech-heavy KOSDAQ rising 0.86% to 829.28. The Korean Won was trading at 1,346.56 against the USD, amid a broad risk-on sentiment driven by semiconductor recovery and major infrastructure expectations.

SK hynix (000660) +5.66%

SK hynix chart

Price now₩1,888,000
Prev close₩1,783,000
Change+5.89%
Mkt cap₩1,379.2T
P/E32.02
P/B10.99
EPS₩58,955
ROE92.68%
Debt ratio32.80%
52W range₩274,000–2,987,000

Analyst consensus — 22 ratings, last 180 days · avg target ₩3,306,818

Buy22
Hold0
Sell0

SK hynix (000660) jumped 5.66% during midday trading, buoyed by a rally in US semiconductor stocks that helped its ADR starting price recover to the $170 level [1, 5]. Domestic brokerages also supported the stock by issuing strong buy recommendations and high target prices [3]. Furthermore, positive market sentiment was bolstered by reports that memory chip inventories have decreased to less than 10 days, improving the company's earnings outlook [6].

Sky Labs Inc. (386380) +20.62%

Price now₩36,750
Prev close₩30,550
Change+20.29%
Mkt cap₩690B
P/E0
P/B0
EPS—
ROE—
Debt ratio—
52W range₩8,200–39,350

Sky Labs Inc. (386380) surged 20.62%, continuing its strong upward momentum for three consecutive trading days after skyrocketing 135% on its Kosdaq debut [7, 9, 10, 12]. The healthcare company previously hit its daily limit-up after presenting clinical data for its ring-type blood pressure monitor at the European Society of Cardiology [8]. Other specific factors behind the midday movements remain unconfirmed [11].

DaewooEngineering&Construction (047040) +12.17%

DaewooEngineering&Construction chart

Price now₩20,750
Prev close₩18,410
Change+12.71%
Mkt cap₩8.5T
P/E-9.45
P/B2.55
EPS₩-2,195
ROE-14.26%
Debt ratio266.54%
52W range₩3,320–40,350

Analyst consensus — 17 ratings, last 180 days · avg target ₩22,656

Buy15
Hold2
Sell0

Daewoo Engineering & Construction (047040) rallied 12.17% as progress on the Gadeokdo New Airport construction project raised expectations for a private contract for the builder, which is a preliminary candidate [16, 17]. Order expectations in the nuclear power and plant sectors also fueled investor optimism [15]. Additionally, supply-demand dynamics improved significantly as both foreign and institutional investors turned net buyers during the session [14].

JUSUNG ENGINEERING Co.,Ltd. (036930) +11.11%

JUSUNG ENGINEERING Co.,Ltd. chart

Price now₩207,500
Prev close₩187,200
Change+10.84%
Mkt cap₩9.6T
P/E274.83
P/B16.06
EPS₩755
ROE1.23%
Debt ratio46.37%
52W range₩26,350–283,000

Analyst consensus — 2 ratings, last 180 days · avg target ₩204,500

Buy2
Hold0
Sell0

JUSUNG ENGINEERING Co.,Ltd. (036930) climbed 11.11%, driven by renewed investor expectations over its robust semiconductor equipment order book [21, 24]. The stock's upward trajectory was further supported by net buying from foreign investors and a general rising trend in the LED equipment theme [22, 23]. Specific details regarding order values or turnaround metrics are currently unconfirmed.

SKSQUARE (402340) +6.22%

SKSQUARE chart

Price now₩1,196,000
Prev close₩1,125,000
Change+6.31%
Mkt cap₩157.8T
P/E17.99
P/B5.71
EPS₩66,468
ROE85.62%
Debt ratio6.62%
52W range₩151,400–2,189,000

Analyst consensus — 6 ratings, last 180 days · avg target ₩1,880,000

Buy6
Hold0
Sell0

SKSQUARE (402340) rose 6.22% at midday. The stock has recently experienced high volatility, halving from its peak in tandem with SK hynix [25, 29] amid intensifying HBM competition and subsequent target price downgrades by analysts [26]. While the stock recorded intraday gains on September 7 and 8 [27, 28], the specific drivers for this immediate midday rebound are unconfirmed.

Sources

  1. SK하이닉스 ADR 상장 시초가 '170달러' 회복…메모리 반도체 기업 강세 — news.einfomax.co.kr · 2026-09-04
  2. 다시 꿈틀대는 SK하이닉스 주가…향후 핵심 이벤트 6가지 — 한국경제 · 2026-09-04
  3. 목표가 67만원·470만원 제시…증권가, 삼성전자·SK하이닉스 ‘강력 매수’ 의견 [수민이가 궁금해요] — v.daum.net · 2026-09-07
  4. SK하이닉스 주가, 급등세... 왜? — 금강일보 · 2026-09-07
  5. SK하이닉스 주가 장중 5%대 올라, 미국 반도체주 훈풍에 삼성전자도 강세 — 비즈니스포스트 · 2026-09-07
  6. SK하이닉스 주가 전망: 메모리 반도체 재고 10일 치 미만으로 감소, 주가 185달러 돌파 전망 — TradingKey · 2026-09-07
  7. [특징주] 스카이랩스, 코스닥 상장 첫날 135% 급등 마감(종합) — 연합뉴스 · 2026-09-04
  8. [특징주] 스카이랩스, 유럽심장학회서 반지형 혈압계 임상 데이터 발표에 상한가 마감 — 바이오타임즈 · 2026-09-07
  9. 스카이랩스 주가 장중 18%대 올라, 코스닥 상장 후 3거래일째 강세 — 비즈니스포스트 · 2026-09-08
  10. [ET특징주] 스카이랩스, 상장 사흘째 강세… 22% 또 뛰었다 — 전자신문 · 2026-09-08
  11. 스카이랩스 주가, 상한가... 이유는? — 금강일보 · 2026-09-07
  12. [특징주] 스카이랩스, 상장 사흘째 상승세… 11%대 급등 - 조선비즈 — Chosunbiz · 2026-09-08
  13. 대우건설 주가, 9월 8일 장중 20,550원 11.62% 상승 — 톱스타뉴스 · 2026-09-08
  14. [장중수급포착] 대우건설, 외국인/기관 동시 순매수… 주가 +13.53% — 뉴스핌 · 2026-09-08
  15. 대우건설 주가 신바람… 원전·플랜트 수주 기대에 건설 대표주 '들썩' — pinpointnews.co.kr · 2026-09-08
  16. '가덕도 신공항' 절차 가시화…예비대상자 대우건설, 12%대 급등 — 뉴시스 · 2026-09-08
  17. 대우건설, 가덕도 신공항 수의계약 기대감에 주가↑ — gukjenews.com · 2026-09-06
  18. [속보] 대우건설 VI 발동, 주가 급등…2만원 돌파 — CBC뉴스 · 2026-09-08
  19. 주성엔지니어링 주가, 9월 8일 장중 202,000원 7.91% 상승 — 톱스타뉴스 · 2026-09-08
  20. 주성엔지니어링 주가 10%대 급등…3거래일 연속 상승 — CBC뉴스 · 2026-09-08
  21. [특징주] 주성엔지니어링(036930), 반도체 수주 탄탄…실적 전환 속도 관건 — 인천일보 · 2026-09-06
  22. 02일, 외국인 코스닥에서 주성엔지니어링(+0.40%), 원익IPS(-0.27%) 등 순매수 — 씽크풀 AI · 2026-09-06
  23. 특징주, 주성엔지니어링-LED장비 테마 상승세에 3.52% ↑ — 매일경제 마켓 · 2026-09-07
  24. 주성엔지니어링 18만원 눈앞 ‘6% 급등’…반도체 장비 수주 기대 다시 불붙었다 — 잡포스트 · 2026-09-04
  25. 210만원→100만원대…닉스·SK스퀘어 주가, 폭등 뒤 폭락 ‘한몸’ — v.daum.net · 2026-09-06
  26. HBM 경쟁 격화, SK스퀘어 주가 급락…증권가 목표가 줄하향 — 내외뉴스통신 · 2026-09-07
  27. SK스퀘어 주가, 9월 7일 장중 1,089,000원 4.61% 상승 — 톱스타뉴스 · 2026-09-07
  28. SK스퀘어 주가, 9월 8일 장중 1,179,000원 4.80% 상승 — 톱스타뉴스 · 2026-09-08
  29. 218만원 찍더니 77만원으로…SK하이닉스 못지않게 날던 SK스퀘어 ‘반토막’ — 더퍼블릭 · 2026-09-07

This is market commentary, not investment advice.