Samsung SDI is trading at KRW 527,000 with a -6.06% change; no clear company-specific announcement was found to explain the October 13 move.

  • Reports said the KOSPI fell 3.65% on October 12 amid foreign selling; battery shares also closed lower despite earlier ESS-demand optimism.
  • Those reports provide market context, not confirmation of the direct cause of the October 13 decline.