Strota/ Newsroom/ Global Markets/ 2026-08-25

KOSPI tumbled 5.3%

Strota Newsroom · Global Markets · session of 2026-08-25 · market close

KOSPI closed at 6,546.48 on 2026-08-25, tumbled 5.3% on the session and is +55.3% year-to-date. Here is what the market data shows.

South Korea's KOSPI tumbled on 2026-08-25, closing at 6546.48 after a fall of 5.3%. The drop left the benchmark well off its recent levels and was among the heaviest single-session moves across the major indices tracked in the pack.

The selloff pushed the index below its 50-day average of 7296.58, though it held above its 200-day average of 5941.89. It now sits 28.18% under its 52-week high of 9114.55 and 108.29% above its 52-week low of 3142.93. Despite the sharp one-day fall, the KOSPI remains up 55.34% year to date, while over shorter windows it is down 6.18% for the week, 7.76% for the month and 16.24% over three months.

As with other markets, the most recent closes of peers carry different dates and should not be read as same-session moves. US gauges on 2026-08-24 were mixed: the S&P 500 slipped 0.28% and the Nasdaq fell 0.76%, while the Dow rose 0.26%. European closes from 2026-08-21 were broadly higher, led by the FTSE 100 at 0.64%, the DAX at 0.59%, the Euro Stoxx 50 at 0.63% and the CAC 40 at 0.37%. In Asia and the Pacific, the Nikkei fell 1.5% and the ASX 200 rose 1.01% on 2026-08-25, while the Hang Seng added 1.21%, Shanghai was flat at 0.04%, TAIEX rose 0.65%, and India's Sensex and Nifty 50 were little changed at 0.0% and 0.08% on 2026-08-21.

Fresh reporting offered context rather than confirmed cause. According to a headline from TradingKey, Samsung Electronics shares dropped sharply and dragged the KOSPI lower. A separate Businesskorea headline described the index breaking the 6,700 level, and a KED Global report pointed to buyback hopes lifting the market in an earlier session. A Business Insider piece noted a broker arguing the AI-stock selloff had gone too far.

The data shows a severe one-day decline but no single confirmed catalyst in the pack. The KOSPI's longer-term uptrend is intact on a year-to-date basis even as it trades below its 50-day average, and the move fits a stretch of weakness across the past week and month.

The numbers

Around the world (same session)

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How this article was made: Strota assembled the market data above (the index's price history, same-session peer-market moves and public headlines) and an AI model wrote the narrative strictly from that evidence — it is not permitted to add outside facts or numbers. Every figure comes from the underlying market/public data.