Goldman Sachs warns Samsung stock may see heightened volatility on Oct. 8

Goldman Sachs analysts say Samsung Electronics could experience sharp price swings on October 8 as its preliminary Q3 results, a semiconductor‑ETF rebalancing, options expiry and the wind‑down of its share buyback all occur on the same day. The bank cut its third‑quarter operating‑profit forecast by about 5% to 106 trillion won, citing a stronger Korean won. Foreign investors have been net sellers of the stock, offloading roughly $2.6 billion over the prior five trading days.

Goldman Sachs notes the convergence of mechanical selling pressure and reduced buy‑back support could push the share price lower on the day, creating short‑term trading risk for investors. The forecast cut signals lower earnings expectations, which may affect valuation models and investor sentiment.

  • 1Goldman Sachs cut its Q3 2026 operating‑profit forecast for Samsung to 106 trillion won, about a 5% reduction from its prior estimate of 112 trillion won.
  • 2The revision reflects an average USD/KRW exchange rate of 1,418 won for the quarter, down from the earlier assumption of 1,460 won.
  • 3Seven semiconductor ETFs with combined assets of roughly $14 billion (about 19 trillion won) will rebalance on October 8, potentially triggering mechanical selling of Samsung shares.
  • 4Samsung’s 15 trillion‑won share buyback program is about 97% complete as of October 6, reducing the buying support from the program.
  • 5Foreign investors sold approximately $2.6 billion of Samsung shares over the five trading days preceding October 8.
  • 6Goldman expects Samsung’s HBM‑bit shipments to grow about 50% quarter‑on‑quarter in Q3 2026.

Sources