Samsung Electronics is trading at $4,892.00, down 4.5%, amid broad foreign and institutional selling that outweighed early support for chip stocks. - In Seoul on September 30, shares closed down 1.47%; foreign investors sold 2.05 trillion won of KOSPI shares that session. - AI infrastructure spending optimism offered early support but did not offset the selling. The reported selloff was market-wide, with no newly reported Samsung-specific announcement; the quoted decline is larger than the Seoul-market move.