Key facts
- Seoul stocks opened sharply lower Tuesday as investors sold off tech heavyweights.
- AI leaders have called for the AI industry to slow down development.
- The KOSPI opened down 25.12 points, or 0.38 percent, to 6,659.25.
- US stocks closed lower overnight, with the S&P 500 down 0.48% and the Nasdaq down 0.56%.
- Rising US bond yields, with the 10-year Treasury yield reaching 5 percent, further dampened investor sentiment.
- Investors are awaiting the US Federal Reserve's upcoming rate decision.
Seoul stocks opened sharply lower on Tuesday, September 15, 2026, as investors reacted to calls from artificial intelligence leaders for a slowdown in the industry due to potential risks. The benchmark Korea Composite Stocks Price Index (KOSPI) fell 0.38% at the open.
US stocks also closed lower overnight, with the S&P 500 down 0.48% and the tech-heavy Nasdaq declining 0.56%. Rising US bond yields, which saw the 10-year Treasury yield briefly touch 5 percent, further contributed to the negative sentiment. Investors are closely watching the upcoming policy meeting of the US Federal Reserve this week.
Trade volume in Seoul's aftermarket, which began trading on Monday, reached 1.87 trillion won (US$1.39 billion), representing approximately 8.03% of the volume recorded during official trading hours, according to the Korea Exchange.