Samsung SDI is trading at KRW 514,000, down -4.46%, amid broader Korean-market weakness as concerns about AI investment profitability weighed on technology shares. - The KOSPI was down 3.36% at 9:15 a.m. - No clear Samsung SDI-specific announcement explaining the November 3 decline surfaced in the search; recent earnings news was positive and does not clearly explain the drop. - Trading volume information was unavailable.