August 4 KOSPI: Watch Samsung Electronics and SK Hynix Investor Flows Before Betting on a Rebound

Rather than assuming the August 4 KOSPI will immediately stage a V-shaped rebound, investors should prepare for significant volatility in early trading.

On 3, the KOSPI fell 5.12%, while Samsung Electronics declined 8.76% and SK Hynix dropped 8.79%. However, the KOSDAQ rose 2.44%.

Rather than a simultaneous collapse across the entire market, the session appeared to be characterized by concentrated selling in the two semiconductor stocks that carry substantial weight in the index.

Foreign investors recorded approximately KRW 2,842,900,000,000 in net selling on the KOSPI. Of that amount, combined net selling of Samsung Electronics and SK Hynix totaled approximately KRW 2,726,500,000,000, representing roughly 95.9%, according to the author's calculations.

U.S. stocks rose in early trading, but memory chipmaker Micron fell approximately 5%. For the Korean market, Micron's performance and broader semiconductor stock movements could be more direct influences than the Nasdaq index itself.

Before the August 4 market opens, check just three things.

① Whether Micron narrowed its losses during the latter part of the U.S. trading session

② Whether the Korean won–U.S. dollar exchange rate stabilizes around KRW 1,430

③ Whether foreign investors' selling of Samsung Electronics and SK Hynix slows during the first 30 minutes after the market opens

If all three indicators improve together, a potential technical rebound may be worth watching. However, if Micron remains weak while foreign investors continue selling, the market could also retest its intraday lows.

Rather than predicting the market's direction in advance, the priority should be monitoring foreign investor flows during the first 30 minutes of trading.

Save this article so you can review it before the market opens.

2026-08-03 23:09 Korea Standard Time. This information is provided for reference only and does not guarantee any particular stock's buying or selling outcome or investment returns.

※ This article is intended solely as a reference for understanding market trends and does not constitute investment advice or a recommendation to invest in any specific stock or asset. All final investment decisions and associated responsibilities rest with the individual investor.