South Korea shares retreat on AI concerns; bourse starts longer trading hours

HYUNDAI MOTOR

14/09/2026 08:31

KOSPI falls, foreigners net sellers
Korean won weakens against dollar
South Korea benchmark bond yield falls
For the midday report, please click nL1N45601Z
SEOUL, Sept 14 (Reuters) - Round-up of South Korean financial markets: ** South Korean shares fell on Monday after Anthropic and OpenAI called for a slowdown in artificial intelligence development. The won weakened, while the benchmark bond yield fell. ** The benchmark KOSPI .KS11 closed down 225.54 points, or 3.26%, at 6,684.37. ** Chipmaker Samsung Electronics 005930.KS fell 4.05%, while peer SK Hynix 000660.KS lost 6.35%. 
** Anthropic CEO Dario Amodei called on AI companies to slow the pace of model development amid mounting fears of AI misuse, outlining a three-step framework to pace development and create more time to manage risks.
** Boston Dynamics, Hyundai Motor Group's humanoid robot unit, is unlikely to pursue an initial public offering next year, a senior executive at the parent company with direct knowledge of the matter said.
** Starting Monday, South Korea's main stock exchange, Korea Exchange, enabled after-hours trading from 4 p.m. to 8 p.m. local time, following a similar move by alternative trading system Nextrade, which introduced evening-hour trading in March 2025.  ** Among other index heavyweights, battery maker LG Energy Solution 373220.KS slid 2.36%, while Hyundai Motor 005380.KS and sister automaker Kia Corp 000270.KS were down 2.88% and down 1.90%, respectively. ** Steelmaker POSCO Holdings 005490.KS shed 2.40%, while drugmaker Samsung BioLogics 207940.KS rose 0.35%. ** Foreigners were net sellers of shares worth 3,288.0 billion won. ** The won was quoted at 1,346.8 per dollar on the onshore settlement platform KRW=KFTC, 0.20% lower than its previous close at 1,344.1. ** The KOSPI has risen 58.62% so far this year. ** The won has strengthened 6.9% against the dollar so far this year. ** In money and debt markets, September futures on three-year treasury bonds KTBc1 gained 0.03 point to 102.68. ** The most liquid three-year Korean treasury bond yield KR3YT=RR fell by 0.8 basis points to 4.015%, while the benchmark 10-year yield KR10YT=RR fell by 3.9 basis points to 4.532%.

 (Reporting by Cynthia Kim; Editing by Sonia Cheema)
 ((Cynthia.Kim@thomsonreuters.com; 822 3704 5655; Reuters Messaging: cynthia.kim.thomsonreuters.com@reuters.net))