Key facts
- Seoul shares opened sharply lower on Friday, September 11, 2026.
- The KOSPI fell 231.42 points, or 3.29 percent, to 6,802.50 at the opening bell.
- U.S. producer price index rose 0.4 percent in August from a month earlier.
- Surging oil prices and escalating Middle East tensions sparked a sell-off in U.S. stocks overnight.
- The Dow Jones Industrial Average fell 0.6 percent, and the Nasdaq Composite declined 0.65 percent.
- Samsung Electronics fell 1.3 percent and SK hynix declined 0.59 percent.
Seoul shares opened sharply lower on Friday, September 11, 2026, mirroring losses on Wall Street as investors grappled with concerns over rising U.S. inflation.
The benchmark Korea Composite Stock Price Index (KOSPI) plunged 231.42 points, or 3.29 percent, to 6,802.50 in early trading. This followed a sell-off in U.S. stocks overnight, which was triggered by surging oil prices and escalating tensions in the Middle East.
The U.S. producer price index (PPI) increased by 0.4 percent in August compared to the previous month, an acceleration from July's 0.1 percent gain. This data, coupled with anticipation for Friday's consumer price report, has fueled speculation that the U.S. Federal Reserve might consider raising interest rates to combat inflationary pressures.