KOSPI Falls Below 6,900 Line Amid Rising U.S. Interest Rate Hike Possibility as Foreign Selling Continues

Domestic Market Trends and KOSPI Movement

Recent domestic stock markets are under adjustment pressure due to ongoing concerns about U.S. inflation. The KOSPI index reached a short-term high of 7,051.64 on September 9, 2026, has been declining consecutively since, and closed at 6,909.91 on September 11, down from the previous day's 7,033.92. The chart below shows the KOSPI closing price trend over the last 20 trading days.

The KOSDAQ index also experienced a correction, closing at 820.64 on September 11, 2026, showing a decline from the previous day's 836.92.

Investor Supply and Demand Trends

Looking at the KOSPI market situation, foreigners and institutions increased their selling together. On September 11, individuals alone net bought 1.8675 trillion KRW, while foreigners net sold 2.2984 trillion KRW and institutions net sold 1.2183 trillion KRW, leading the decline. The KOSPI investor trading trends over the last 10 days are as follows.

In the KOSDAQ market on the same day, individuals net bought 512 billion KRW, while foreigners (-312.3 billion KRW) and institutions (-215.8 billion KRW) continued their selling trend.

Futures Market and Overseas Market Signals

Domestic KOSPI200 futures (K200_FUT) closed at 1,089.55 on September 11 with a basis of -0.67. In the futures market, foreigners showed net selling of 2,543 contracts.

For U.S. overnight futures, as of the September 12, 2026 snapshot, S&P500 futures (ES=F) were up 0.84%, Nasdaq futures (NQ=F) up 0.89%, and Dow futures (YM=F) up 0.95%. However, due to the U.S. core CPI exceeding expectations and reports of Middle East price shocks, the probability of a U.S. interest rate hike once approached 90%, with concerns about prolonged global monetary tightening remaining as market uncertainty.

Corporate Credit Rating Adjustments

According to recent domestic corporate credit rating results, Kumho Tire's credit rating was upgraded from A to A+ (Stable) by both NICE Credit Rating (September 11) and Korea Ratings (September 10). Meanwhile, Fashion Group Hyungji's private general corporate bond credit rating was downgraded from B+ to B- (Negative) by Korea Ratings (September 10).

Source and Data Limitations Notice

• Source: This briefing's supply/demand and index statistics refer to Korea Exchange (KRX) data, corporate credit rating changes are based on public announcements from NICE Credit Rating, Korea Ratings, and Korea Corporate Evaluation, and market news summaries are based on articles from Yonhap News and Hankyung.
• Data Limitations: This material is a summary of past data as of September 12, 2026, and may not reflect real-time market conditions. This information is provided for reference purposes only and does not include investment recommendations or suggestions for individual products. The final responsibility for investment decisions lies entirely with the investor.