KOSPI Weakness: Foreign Sell-Offs and Semiconductor Slump
With KOSPI dropping over 5% in August amid heightened volatility, foreign sell-offs and the slump in semiconductor leaders are driving the market weakness. The return of foreign capital and upcoming U.S. inflation data will be key to a market rebound.
Background of KOSPI Weakness: Extreme Volatility and Foreign Exodus
As of August 9, 2026, the domestic stock market continues to experience a KOSPI weakness, severely dampening investor sentiment. According to reports from Money Today and other major domestic media on August 9, the KOSPI index has plummeted by over 5% in August, and market volatility has expanded dramatically, evidenced by two sell-side sidecar activations. Driven by anxiety over index fluctuations, the daily average transaction value and volume have fallen to their lowest levels of the year, deepening the wait-and-see approach among investors.
The primary cause of this bearish trend is the massive sell-off by foreign investors. Amid growing fears of a U.S. economic recession and geopolitical tensions in the Middle East, a clear preference for safe assets has emerged. Consequently, simultaneous selling by foreign and institutional investors is exerting strong downward pressure on the index.
Slump in Semiconductor Leaders: Peak-out Concerns and Policy Delays
At the center of this recent KOSPI weakness is the painful slump of semiconductor large-cap stocks, which have historically driven the domestic market's upward momentum. The stock prices of the market-leading "top two" semiconductor giants, Samsung Electronics and SK Hynix, have dropped significantly in August, applying immense downward pressure on the broader market.
- Earnings Peak-out Concerns: Possibilities of slowing global AI semiconductor demand and controversies over second-half earnings reaching a peak have fueled the exodus of foreign capital.
- Delayed Shareholder Return Policies: Delays in the announcement of specific shareholder return policies, such as large-scale share buybacks and dividend expansions expected by the market, have led to massive disappointment-driven sell-offs.
Future Outlook: Return of Foreign Capital and Macroeconomic Indicators
Regarding when the stock market might stabilize, Bloomberg reported on August 9 that the most chaotic phase is somewhat subsiding due to the liquidation of leveraged positions and tightened regulations on single-stock leverage ETFs. However, critical tasks remain for a full-fledged trend reversal.
The most crucial factor is the return of departed foreign capital. This requires the practical implementation of corporate value-up programs and the materialization of shareholder return policies. Furthermore, the upcoming releases of the U.S. Consumer Price Index (CPI) and Producer Price Index (PPI), signals of interest rate cuts by the Federal Reserve, and developments in the Middle East situation will serve as major milestones determining the future direction of the domestic stock market.