KOSPI rallies on optics and battery optimism; KOSDAQ slips

The KOSPI closed up 0.46% at 6,820.02 while the KOSDAQ fell 0.49% to 834.29. Despite net foreign and institutional selling on both boards, the market showed a risk‑on tone led by optics, robotics and battery‑related news, and the won held at 1,377.90 per dollar.

LG Innotek (011070) +5.07%

LG Innotek surged 5.07% after Hyundai Motor Securities upgraded its target price to 1,030,000 KRW, arguing that a stabilization of its optics segment would justify a full re‑rating of its substrate business [5]. The stock also benefited from its recent inclusion in the MSCI index, which analysts say could trigger a re‑valuation of its server‑substrate exposure [6]. While the same house cut its target for the camera line after a shift to FC‑BGA technology, the positive catalyst outweighed the cautionary note [4]. Price gains were reflected in multiple intraday reports, including a 0.98% rise on August 31 [1].

LGELECTRONICS (066570) +7.44%

LG Electronics jumped 7.44% as foreign investors and institutions bought in tandem, pushing the share back above the 200,000 KRW threshold and sparking a broader rebound [11]. A separate report highlighted rising robot‑business pricing, which analysts say lifted the company’s overall valuation [12]. Intraday coverage noted the sharp rise, although some outlets also reported short‑term pull‑backs, underscoring the dominant influence of the coordinated buying and robot segment strength [7][9][10].

SK Innovation (096770) +7.36%

SK Innovation rallied 7.36% after its subsidiary SK On announced a large‑scale energy‑storage‑system (ESS) supply contract, reviving earnings expectations and driving the stock up more than 6% intraday [14]. The same week, SK On secured a U.S. order, reinforcing the perception that the parent’s biggest shareholder is on a growth trajectory [18]. Market chatter also mentioned a possible post‑spin‑off merger with the parent, though concrete impact remains unclear [16]. These developments were highlighted in several news pieces reporting the sharp price surge on August 31 [13][17].

POSCO FUTURE M (003670) +7.62%

POSCO Future M surged 7.62% as a wave of media reports uniformly highlighted its price gains throughout the session, creating a bullish sentiment that attracted buyers [19][20][21]. The rally was further buoyed by a sector‑wide optimism note titled “Battery stocks still have room,” which singled out POSCO Future M as a beneficiary of the ongoing electric‑vehicle battery boom [22]. No specific corporate event was cited, so the upward move appears driven primarily by positive coverage and sector sentiment.

L&F (066970) +8.83%

L&F climbed 8.83% after it began shipping its first LFP batteries for North‑American ESS projects in the second half of the year, a development that lifted revenue expectations [23]. Meritz Securities reinforced the upside by forecasting that LFP cathode‑material earnings will be reflected from Q4 and that the high‑nickel business will also grow, prompting a positive investor response [24]. The stock also benefited from a streak of institutional net buying for 14‑15 consecutive days, underscoring solid demand for the shares [25][27].

Sources

1. LG이노텍 주가, 8월 31일 장중 617,000원 0.98% 상승 — 톱스타뉴스 · 2026-08-31
2. 8월 4주차 LG이노텍 주가 61만원대 상승세 마감 — 톱스타뉴스 · 2026-08-29
3. LG이노텍 주가, 8월 28일 장중 608,000원 1.84% 상승 — 톱스타뉴스 · 2026-08-28
4. 현대차證 LG이노텍, 카메라 넘어 FC-BGA로 재평가…목표가는 하향 — 아주경제 · 2026-08-31
5. [리포트 브리핑]LG이노텍, '광학이 안정화된다면, 기판으로 인한 Re-Rating 충분' 목표가 1,030,000원 - 현대차증권 — 뉴스핌 · 2026-08-31
6. 1년 만에 MSCI 편입…LG이노텍, 서버 기판으로 재평가 기대 — 한국경제 · 2026-08-31
7. LG전자 주가, 오늘 왜 급등했나 — Investing.com 한국어 · 2026-08-31
8. LG전자 주가, 8월 28일 장중 199,300원 0.50% 상승 — 톱스타뉴스 · 2026-08-28
9. LG전자 주가 하락 중 — 아시아뉴스통신 · 2026-08-31
10. LG전자 주가, 8월 31일 장중 203,000원 0.74% 상승 — 톱스타뉴스 · 2026-08-31
11. [마감분석] LG전자, 외인·기관 쌍끌이 매수에 20만원선 회복하며 반등 : 기업주식정보 — 재경일보 · 2026-08-28
12. 로봇 몸값 치솟자… LG전자 가치도 뛴다 - 머니투데이 — 머니투데이 · 2026-08-30
13. SK이노베이션 주가, 오늘 급등한 이유는? — Investing.com 한국어 · 2026-08-31
14. SK이노베이션 주가 장중 6%대 강세, 자회사 SK온 대규모 ESS 공급 계약 — 비즈니스포스트 · 2026-08-31
15. SK이노베이션 주가 껑충 — CBC뉴스 · 2026-08-31
16. “쪼개기 상장했다가 결국 모회사로 합병…SK이노베이션 주가가 관건” — 뉴스퀘스트 · 2026-08-28
17. SK이노베이션 주가, 8월 31일 장중 123,900원 6.07% 상승 — 톱스타뉴스 · 2026-08-31
18. [특징주] SK이노베이션, 최대주주인 SK온 美 수주.. '강세' — 글로벌이코노믹 · 2026-08-31
19. 포스코퓨처엠 주가, 8월 31일 장중 193,200원 3.70% 상승 — 톱스타뉴스 · 2026-08-31
20. 포스코퓨처엠 주가 2,300원 상승 후 장마감 — 아시아뉴스통신 · 2026-08-28
21. 포스코퓨처엠 주가 상승 중 — 아시아뉴스통신 · 2026-08-31
22. 2차전지주 아직 늦지 않았습니다 포스코퓨처엠 주가 여기까지 갑니다 Andrea Amato (SUZKMLzjeQ) — Mshale · 2026-08-31
23. [종목 포커스] 엘앤에프, 하반기 북미 ESS용 LFP 첫 출하로 주가 상승 지속? — 데일리인베스트 · 2026-08-30
24. 메리츠증권 "엘앤에프 4분기부터 LFP 양극재 실적에 반영, 하이니켈도 성장" — 비즈니스포스트 · 2026-08-28
25. [장중수급포착] 엘앤에프, 기관 15일 연속 순매수행진... 주가 +6.31% — 뉴스핌 · 2026-08-31
26. 엘앤에프 주가 강세…코스피·코스닥 동반 하락에도 상승 — CBC뉴스 · 2026-08-31
27. [장중수급포착] 엘앤에프, 기관 14일 연속 순매수행진... 주가 +1.46% — 뉴스핌 · 2026-08-28
28. 엘앤에프 주가, 8월 28일 134,800원 3.85% 상승 마감 — 톱스타뉴스 · 2026-08-28

This is market commentary, not investment advice.