What Happened?

After the market closed on September 19, 2025, 342,980 shares of SK Hynix were traded for 120.7 billion KRW in an after-hours block trade. Foreign investors showed volatility, with net buying of 859.5 billion KRW followed by net selling of 1.1 trillion KRW on the same day.

Why is the After-Hours Block Trade Important?

After-hours block trades can indicate a shift in investor sentiment. Large-scale trades, especially by foreign investors, can be interpreted as short-term signals about future stock movements. This transaction could reflect short-term profit-taking or a wait-and-see approach.

Should I Invest in SK Hynix Now?

SK Hynix is a key beneficiary of the AI market and leads the HBM market. Strong performance, solid financials, active technology investment, and shareholder return policies enhance its long-term investment value. However, macroeconomic uncertainty, raw material price fluctuations, and intensified competition are risk factors. Overall Opinion: BUY

Action Plan for Investors

  • Short-term strategy: Monitor the after-hours block trade, foreign investor trends, and changes in supply and demand.
  • Mid- to long-term strategy: Monitor AI market growth, HBM technology competitiveness, new investments, and macroeconomic indicators while looking for additional buying opportunities.