KOSPI, 'V-shaped' Rebound in Just One Day After Sidecar...Samsung Electronics and SK Hynix Surge Together

▲ KOSPI, domestic stock market, Samsung Electronics, SK Hynix/AI generated image

Behind the Korean stock market's reversal of the previous day's shock in just one day lay the persistent buying instinct of global funds surrounding AI memory semiconductors.

According to the investment specialized media Barron's on July 3 (local time), the KOSPI index closed at 8,088.34, up 5.76%, after falling to the 7,300 level during the day. The market, which had fallen by 7.89% due to the previous trading day's tech stock plunge and even triggered a trading halt with a "sell sidecar" nature during the session, staged a V-shaped rebound in just one day.

At the center of the rebound were SK Hynix and Samsung Electronics. Barron's pointed out that the Korean stock market is heavily influenced by the trends of the two largest components in its benchmark index, the leading memory semiconductor stocks. On this day, SK Hynix surged by 10.9% and Samsung Electronics by 8.2%, leading the KOSPI rebound.

The shock on the previous day was even greater. SK Hynix had plummeted by 14.6% on the previous trading day, and Samsung Electronics also fell by 9.1%. However, buying momentum returned to Samsung Electronics' stock price after reports emerged that AI startup Anthropic was in discussions with Samsung Electronics to develop custom hardware.

The memory semiconductor rally is also intertwined with Micron Technology (MU) in the U.S. market. Micron closed down 5.5% at $975.56 on the previous day, but it has risen by 166.4% year-to-date. Barron's explained that memory semiconductors are emerging as a key topic in the AI revolution, attracting attention from global markets.

For the same reason, the KOSPI index has emerged as the hottest index in the world in 2026. After this day's rebound, KOSPI's annual growth rate was recorded at approximately 92%, significantly outperforming the S&P 500 Index (SPX)'s 9.3% increase. Barron's viewed the rebound in the Korean stock market as a positive signal for the potential rebound of Micron in the U.S. market, which will reopen on Monday after the July 4th holiday.

[Article Summary]

-The KOSPI index closed on July 3 at 8,088.34, up 5.76%, overcoming the previous day's shock of a 7.89% plunge.

-SK Hynix surged by 10.9% and Samsung Electronics by 8.2%, leading the V-shaped rebound of the Korean stock market.

-Barron's analyzed that the memory semiconductor frenzy has boosted KOSPI by approximately 92% this year and could also influence expectations for a Micron rebound in the U.S.

*Disclaimer: This article is for investment reference only, and we are not responsible for investment losses based on it. The content should be interpreted for informational purposes only.*