대한민국 증시 코스피 변동성 및 영향 요인 보고 — 2026-10-12

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1. KOSPI Market Indicators and Major Supply & Demand Trends

While specific daily trading values or real-time supply and demand data for the day have not been provided, indicators reflecting overall market trends have been reported.

• Market Sentiment and Outlook: Following the Hangul Day holiday closure, expectations of bargain hunting inflows are building up, raising hopes for a KOSPI rebound. This is seen as a result of appealing valuations following recent declines.
• Trading Volume and Volatility Trends: Entering 2026, the KOSPI has dropped 22% from its peak, with trading volume plunging by 70%. This suggests that investor interest has cooled down as the AI investment craze subsides.
• Foreign and Institutional Trends: Amid growing caution ahead of the earnings season, net selling by foreign and institutional investors continues, with large-cap KOSPI stocks predominantly sliding.

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2. Key Volatility Drivers Today

The dominant factors moving the market today are global macroeconomic issues and geopolitical risks.

1. Middle East Geopolitical Risks: Heightened tensions in the Middle East are fueling risk-off sentiment globally, emerging as a major cause for increased KOSPI volatility.
2. US Inflation Data: The upcoming release of US inflation figures serves as a critical variable to gauge the Federal Reserve's rate policy direction. If inflation comes in higher than expected, expectations for rate cuts could recede, exerting a negative impact on the stock market.
3. Earnings Season Caution: Concerns over earnings uncertainty are growing ahead of corporate earnings announcements. In particular, if profitability improvements in key industries like semiconductors fall short of market expectations, it could act as additional downward pressure.

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3. Macroeconomic Factors and Economic Indicators

The macroeconomic environment remains mired in uncertainty, with exchange rates and interest rate indicators drawing attention.

• Stabilization of the KRW/USD Exchange Rate: As of October 9, 2026, the KRW/USD exchange rate stood at 1,341.54 KRW, down 0.06% from the previous day. The rate is stabilizing due to dollar-selling by exporters, which could serve as a positive factor for foreign investor sentiment.
• US Interest Rates and Fed Policy: US Treasury yields are on a downward trend, and the Bank of Korea has also reduced bond supplies in October to help lower domestic interest rates. However, some projections suggest volatility could pick up depending on the possibility of additional rate hikes.
• Cooling of Global AI Themes: As the enthusiasm for AI-related stocks—which previously drove the KOSPI's rally—cools down, overall market trading values are plummeting. This is leading to pressure to rebalance growth-stock-centric portfolios.

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4. Comprehensive Analysis and Notes for Investors

The market is currently showing a tug-of-war between the possibility of a technical rebound driven by post-holiday bargain hunting and global macroeconomic risks (Middle East situation, US inflation). Amid shrinking trading volumes, net selling by foreigners and institutions persists, calling for a defensive stance in the short term.

Investors need to keep a close eye on the release results of the US Consumer Price Index (CPI) data and changes in the Middle East geopolitical situation, while preparing for volatility stemming from earnings surprises or shocks of individual stocks during the earnings season.