Chip‑related rally lifts select stocks amid KOSPI pullback

The KOSPI slipped to 6,209.93, down 1.37%, while the KOSDAQ fell 2.72%, indicating a broadly bearish session. Nevertheless, several semiconductor‑linked and specialty stocks posted strong gains, driven by institutional buying, sector sentiment and corporate developments.

SamsungElectroMechanics (009150) +4.07%

Samsung Electro‑Mechanics rebounded 4.07% after a 10% plunge earlier in the week, drawing in institutions and analysts who saw a low‑price entry point, as reported by Korea Economic (2026‑08‑06) [1]. The recovery was reinforced by a broader revival in semiconductor sentiment and expanding foreign net buying, highlighted in Business Post (2026‑08‑05) [6]. Moreover, the stock logged its fourth consecutive day of gains, posting double‑digit strength around 11% over the past four sessions, which further bolstered investor confidence [4].

HANWHA SOLUTIONS (009830) +7.73%

Hanwha Solutions surged 7.73% as senior vice‑president Kim Dong‑kwan’s 5‑billion‑won participation in a rights issue sparked strong buying pressure, lifting the stock by 7‑10% according to Business Post and Electronic Times on August 4 [7][8][9][11]. The market also priced in better‑than‑expected second‑quarter earnings, generating additional demand that pushed the rally into the high‑single digits, as noted by Daum’s Hot Time column [12]. Together, the capital‑raising news and earnings optimism drove the sharp uptick.

SAMSUNG SDI CO.,LTD. (006400) +3.75%

Samsung SDI climbed 3.75% after a three‑month slump that erased about 40% of its value, prompting discussions of shareholder‑appeasement measures (FNTimes, Aug 4) [13]. Investor sentiment was further buoyed by a large purchase from Samsung Life Insurance’s special account, expanding the affiliate’s stake and signaling confidence (Digital Today, Aug 3) [16]. The stock also enjoyed a streak of daily gains exceeding 4% from Aug 4 to Aug 7, with notable jumps on Aug 4 (4.75%) and Aug 7 (5.74%) as reported by TopStar News and Asia Newswire [14][17][18].

AUK (017900) +15.32%

AUK (Gwangjeon) surged 15.32% as retail investors rushed in, creating an atypical spike in buying activity (Jaegyeong Ilbo, Aug 5) [22]. The rally was amplified by a broader upswing in optics and photonic‑semiconductor stocks, which lifted the company alongside peers in the sector (CBC News, Aug 5) [21]. Additionally, the overall strength of KOSPI’s top‑trading stocks helped push AUK’s price close to a 20% gain, as highlighted in Seoul Data Lab’s market recap (Seoul Shinmun, Aug 5) [23]. Price action on Aug 5 showed a 17% intraday rise (TopStar News) [19], underscoring the momentum.

HYOSUNG HEAVY INDUSTRIES (298040) +4.10%

Hyosung Heavy Industries rose 4.10% as analysts upgraded its earnings and order outlook, prompting a 7% jump in the stock (Investing.com Korea, Aug 4) [29]. The revisions, together with a target‑price increase despite a downgrade, reflected confidence in the company’s fundamentals (alphabiz, Aug 4) [28]. Parallelly, heightened demand for power infrastructure in the United States and North America sparked a sector‑wide rally, lifting power‑equipment shares including Hyosung (Business Post, Aug 5) [26][30]. Although one report noted a lower target price, the positive earnings and demand backdrop outweighed the downside pressure (Korea Economic, Aug 3) [25].

Sources

1. 10% 급락한 삼성전기, 주식 초고수는 주워 담았다 — 한국경제 · 2026-08-06
2. 삼성전기 주가, 8월 3일 1,181,000원 3.42% 상승 마감 — 톱스타뉴스 · 2026-08-03
3. 삼성전기 장초반 11퍼센트 급등 130만 원 선 회복 — 2news.co.kr · 2026-08-05
4. [STOCK톺] 삼성전기, 11%대 강세...4거래일 연속 상승 — 뉴시안 · 2026-08-05
5. 코스피, 1.50% 오른 6351.38 출발...SK하이닉스·삼성전기 주가 강세 — gukjenews.com · 2026-08-04
6. [오늘의 주목주] '반도체 투심 회복' 삼성전기 주가 14%대 상승, 코스피 외국인 매수에 6590선 상승 마감 — 비즈니스포스트 · 2026-08-05
7. 한화솔루션 주가 장중 7%대 강세, 수석부회장 김동관 유상증자 참여 영향 — 비즈니스포스트 · 2026-08-04
8. [ET특징주] 한화솔루션, 김동관 수석부회장 유증 참여 소식에 주가 강세 — 전자신문 · 2026-08-04
9. [특징주] 한화솔루션, 김동관 유증 참여.. 10%대 '급등' — 글로벌이코노믹 · 2026-08-04
10. 한화솔루션 주가, 8월 5일 장중 30,900원 15.30% 상승 — 톱스타뉴스 · 2026-08-05
11. [특징주] 한화솔루션, 김동관 5억 베팅에 10%대 강세 — 뉴스핌 · 2026-08-04
12. [핫타임] 한화솔루션, 김동관 유증 참여·2분기 호실적에 8%대 강세 — v.daum.net · 2026-08-04
13. 삼성SDI, 3개월 새 주가 40%↓…주주 달래기 카드 꺼낼까? — fntimes.com · 2026-08-04
14. 삼성SDI 주가, 8월 4일 장중 408,000원 4.75% 상승 — 톱스타뉴스 · 2026-08-04
15. 삼성SDI 주가 상승 중 — 아시아뉴스통신 · 2026-08-06
16. 삼성이앤에이, 최대주주 삼성SDI 등 주식 4만2750주 증가…계열사 삼성생명보험 특별계정 장내매수 영향 — 디지털투데이 · 2026-08-03
17. 삼성SDI 주가, 8월 7일 장중 451,500원 5.74% 상승 — 톱스타뉴스 · 2026-08-07
18. 삼성SDI 주가 9,500원 상승 후 장마감 — 아시아뉴스통신 · 2026-08-05
19. 광전자 주가, 8월 5일 장중 6,810원 17.01% 상승 — 톱스타뉴스 · 2026-08-05
20. 광전자 주가, 급등세... 이유는? — 금강일보 · 2026-08-05
21. 대한광통신 광전자 주가 두자리수 급등…광통신·광반도체주 동반 강세 — CBC뉴스 · 2026-08-05
22. 광전자, 개인 매수세 힘입어 이례적 급등세 연출 : 한국증시 — 재경일보 · 2026-08-05
23. [서울데이터랩]코스피 거래상위 종목 강세…광전자 24% 급등, 삼성전자·SK하이닉스도 상승 — 서울신문 · 2026-08-05
24. 광전자 주가, 8월 7일 장중 7,950원 17.08% 상승 — 톱스타뉴스 · 2026-08-07
25. "효성중공업, 주가 후퇴에 목표가도 내리지만…실적 전망 상향"-대신 — 한국경제 · 2026-08-03
26. 효성중공업 주가 장중 10%대 상승, 전력 인프라 기대감에 전력기기주 강세 — 비즈니스포스트 · 2026-08-05
27. [버핏 리포트] 효성중공업, 주가는 '후퇴', 펀더멘털은 '전진'...미국 전력기기 호황 본격화 - 대신 — 버핏연구소 · 2026-08-04
28. 효성중공업, 목표주가 하향에도 실적·수주 전망치 상향 By 알파경제 alphabiz — Investing.com 한국어 · 2026-08-04
29. 효성중공업, 증권가 실적·수주 전망치 상향에 7%대 급등 — 매일경제 · 2026-08-04
30. 효성중공업, 북미 전력 수요 확대에 성장 지속...목표주가↓ — ksdaily.co.kr · 2026-08-04

This is market commentary, not investment advice.