Samsung Electronics, SK Hynix Rebound 1% Amid Foreign Selling

What the Samsung Electronics and SK Hynix Rebound Signals

The early gains in Samsung Electronics and SK Hynix reveal more about how buyers diverged after the previous day's sharp drop (plunge) than they confirm a trend recovery. In trading on September 29, 2026, as reported by Yonhap News Securities, both stocks reversed their morning weakness to rise about 1% from the previous session, but foreign investors and domestic supply-demand (order flow) moved in opposite directions.

As of 9:33 a.m., Samsung Electronics was trading at 273,000 won, up 1.11% from the previous session. SK Hynix was also up 0.85% at 1,783,000 won. Investors should distinguish between a price rebound and a reversal in supply-demand (order flow), as the two do not yet mean the same thing.

Recovering Intraday After the Previous Day’s 5% Decline

On the previous day, the first trading session after the Chuseok holiday, Samsung Electronics fell 5.43% and SK Hynix dropped 5.05%. A gain of about 1% the following day was not enough to recover all of those losses. Current prices show resilience immediately after a sharp drop (plunge), not a direction sustained through the market close.

Early intraday swings were also substantial. Samsung Electronics opened down 1.48% at 266,000 won before turning higher, while SK Hynix fell as much as 4.59% to 1,768,000 won shortly after the open before rebounding. Despite similar gains, the turbulent path from the open to 9:33 a.m. shows that buying and selling pressure were fiercely contested.

Foreign Selling Diverges From Domestic Buying

At the time the article was written on September 29, 2026, retail investors purchased a net 286.9 billion won and institutional investors a net 104.4 billion won on the KOSPI market. Foreign investors countered with 545 billion won in foreign net selling, while other corporations bought a net 149.9 billion won. The session showed more clearly which investors supported the rebound than the market’s overall price movement did.

In the KOSPI electrical and electronics industry sector, which includes Samsung Electronics and SK Hynix, retail investors and institutional investors purchased a net 114.8 billion won and 133.3 billion won, respectively, while foreign investors sold a net 398.2 billion won. Morgan Stanley and Goldman Sachs ranked among the leading sellers of SK Hynix. Continued foreign selling would remain a headwind for the early rebound, while a shift to net buying would change the supply-demand (order flow) picture.

U.S. Rates and Semiconductor Index Set External Conditions

Overnight, the Dow Jones Industrial Average fell 0.67%, while the Standard & Poor’s (S&P) 500 declined 0.77%. The Nasdaq Composite closed down 0.92%, and the Philadelphia Semiconductor Index lost 1.61%. The gains in the two Korean chip stocks therefore did not follow the direction of overseas risk assets.

The U.S. 10-year government bond yield rose as much as 6.1bp from the previous session to reach 5.241%. One bp equals 0.01 percentage point. Rising rates weigh on valuations, and that pressure can affect trading decisions in industry leaders Samsung Electronics and SK Hynix. The market has already priced in the overnight weakness, but it remains unclear whether the morning rebound can hold amid elevated rates.

Samsung Electronics Ex-Dividend Date and Share Buybacks

• September 29, 2026, was Samsung Electronics’ third-quarter ex-dividend date. Because the ex-dividend adjustment coincided with the early rebound, the effect of any single factor cannot be isolated from the price movement alone.
• Samsung Electronics and SK Hynix were reported to be conducting large-scale share buybacks. However, the purchase amounts and specific periods were not confirmed, leaving no basis for quantifying their potential impact on the share prices.
• Other corporations’ net buying of 149.9 billion won was confirmed, but purchase amounts for the two companies individually were not provided. Marketwide supply-demand (order flow) should not be interpreted as though it represented the supply-demand (order flow) of each stock.

Three Things Semiconductor Investors Should Monitor

• Closing prices: The first question is whether Samsung Electronics’ 1.11% gain and SK Hynix’s 0.85% advance as of 9:33 a.m. held through the closing price.
• Foreign investor direction: Investors should watch whether foreign net selling of 545 billion won on the KOSPI market and 398.2 billion won in the KOSPI electrical and electronics industry sector declines or shifts to net buying.
• Rates and overseas semiconductor performance: Movements in the U.S. 10-year government bond yield and the Philadelphia Semiconductor Index will shape external conditions for Korean semiconductor stocks.
• Share-buyback details: The size and duration of each company’s purchases must be disclosed before their impact on supply-demand (order flow) can be assessed in detail.

Conditions That Could Sustain or Break the Rebound

The bullish scenario would see the early price recovery hold and foreign net selling ease. If purchases by retail investors, institutional investors and other corporations combine with share buybacks by the two companies, the market could continue absorbing the selling pressure that emerged after the previous day’s sharp drop (plunge).

The opposing scenario would involve increased foreign selling and continued pressure from U.S. government bond yields. In that case, the argument that the morning rebound signals a trend reversal would weaken. The next indicators to watch are not a vague semiconductor narrative, but the closing prices of Samsung Electronics and SK Hynix, whether foreign supply-demand (order flow) reverses, and the confirmed scale of their share buybacks.

This article was automatically summarized and analyzed based on the original news report. View original article (Yonhap News Securities)