AJP Factbox: KOSPI amongst the worst performers in October 2026
by Ryu Yuna
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South Korea’s benchmark KOSPI posted the weakest performance among major global stock indexes from Oct. 1 to 16, falling 17.11 percent, as concerns over AI profitability and heavy foreign selling weighed on the market. Source: Epic AI.
Foreign investors net sold 18.13 trillion won (approximately $13.6 billion) in South Korean stocks over eight consecutive trading sessions in October, while 68.8 percent of KOSPI- and KOSDAQ-listed stocks declined through Oct. 16. Samsung Electronics and SK hynix fell 19.74 percent and 28.38 percent, respectively. Source: Epic AI, Korea Exchange.
Yuna Ryu covers finance, capital markets and Southeast Asian affairs.
She is drawn to the questions that numbers raise and the stories that data alone cannot answer.
Prior to journalism, she worked at Hyundai Motor Company and the Singapore Chamber of Commerce, focusing on business strategy and international affairs. She has also hosted diplomatic receptions and international conferences as an MC.
Ryu holds a master's degree in Media and Communication from Korea University, where her research focused on neuroscience-based studies of media effects.