Key facts
- South Korean stocks opened lower on Monday, September 28, 2026.
- Hopes for a diplomatic breakthrough in the Iran conflict pushed oil prices lower.
- The KOSPI index fell 23.06 points, or 0.33 percent, to 7,057.86.
South Korean stocks opened lower on Monday, September 28, 2026, despite gains on Wall Street. Hopes for a diplomatic resolution to the Iran conflict pushed oil prices down, impacting market sentiment. The benchmark KOSPI index fell 0.33% in early trading.

The South Korean market's reaction highlights the interconnectedness of global markets, where geopolitical developments and commodity price shifts can influence investor sentiment and trading activity across different regions.
South Korean stocks opened lower on Monday, September 28, 2026, despite advances in U.S. markets. The benchmark Korea Composite Stock Price Index (KOSPI) fell 23.06 points, or 0.33 percent, to 7,057.86 in the early trading minutes. This decline occurred despite Wall Street's gains on the preceding Friday, where the Dow Jones Industrial Average rose 0.93 percent, the S&P 500 gained 0.51 percent, and the Nasdaq Composite Index advanced 0.48 percent. The dip in Seoul was attributed to falling oil prices, which were influenced by hopes for a diplomatic resolution to the conflict in Iran. Brent crude had settled around $104 a barrel following reports of a peace proposal from Iran.
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