Samsung SDI is trading 4.1% down now at KRW 479,000, amid broader risk-off sentiment, rising Treasury yields, higher oil prices, and uncertainty around electric-vehicle demand.

  • Shares fell 5.43% on August 18 before a subsequent rebound; no new company-specific announcement clearly explains the August 21 decline.
  • The August 11 decision to acquire General Motors’ 49.99% Indiana battery-joint-venture stake remains relevant background, not a fresh catalyst for this session.