코스피 변동성 및 영향 요인 보고 (2026년 10월)
10월 23일(금) 코스피는 미국 반도체 주가 하락 여파로 장 초반 5,300선까지 급락했으나, SK하이닉스의 솔리다임 상장 철회 호재와 기관 매수세에 힘입어 5,550선으로 반등 마감했습니다. 주말을 지나 10월 25일 현재, 원/달러 환율은 1,320원대 중반에서 소폭 상승하며 기술주 불안과 위험회피 심리가 지속되고 있는 상황입니다.
코스피 변동성 및 영향 요인 보고 — 2026-10-25
1. 코스피 시장 지표 및 주요 수급 현황
On October 23, the KOSPI index plunged to the 5,300 level in early trading due to a U.S.-origin semiconductor shock, but recovered to 5,550.30 points by the close, erasing most of its losses of around 4%. Notably, SK hynix led the index recovery as its share price rebounded following the decision to suspend Solidigm's IPO. In contrast, the KOSDAQ index closed down 1.62% due to net selling by foreign and institutional investors.

In the foreign exchange market on October 23, foreign investors recorded net selling of approximately 1 trillion won.
2. 오늘의 핵심 변동성 요인
The biggest driver of current KOSPI volatility is global risk-off sentiment fueled by plunging U.S. tech and semiconductor stocks. News of Meta's massive AI capital expenditures and shift into an FCF deficit caused tech and semiconductor shares to plummet in the U.S. stock market, dealing a direct blow to the domestic market as well.

Additionally, heightened geopolitical tensions combined with the Nasdaq's sharp decline triggered widespread selling across tech shares. However, individual positive news—specifically SK hynix's cancellation of the Solidigm IPO—acted as a major defensive factor that calmed panic selling in the semiconductor sector.
3. 매크로 요인 및 경제지표
The won-to-dollar exchange rate dropped to the early 1,320 won range on October 23 before rebounding slightly to hit the mid-1,320 won range. As of October 25, the won/dollar exchange rate stands at 1,326.90 won.

According to a KB Think report, the dollar-won exchange rate is expected to show a rebound trend within the 1,320–1,334 won range due to tech stock plunges and risk-off sentiment.

The Korea Development Institute (KDI) analyzed that the rapid surge in KOSPI over the past year could act as a short-term valuation burden, while expectations for value-up policies and improving corporate earnings are expected to serve as upward momentum.
4. 분석 종합 및 투자자 참고사항
Although the sharp decline caused by the U.S. semiconductor shock was subdued by positive news from SK hynix, market anxiety has not been completely resolved as foreign net selling and upward pressure on the exchange rate persist. Investors need to pay close attention to global tech-related issues and whether the won/dollar exchange rate breaks into the 1,330 won range. Furthermore, KDI warns that valuation burdens from the short-term surge may limit the scope of any upward movement.
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