KOSPI Stages 'V-shaped' Rebound a Day After Sidecar; Samsung Electronics and SK Hynix Surge Together

▲ KOSPI, Korean Stock Market, Samsung Electronics, SK Hynix/AI Generated Image

The persistent buying instinct of global capital, driven by artificial intelligence memory semiconductors, was behind the Korean stock market's reversal of the previous day's shock in just one day.

According to the investment specialist 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 plunge in tech stocks and even saw a sell-side sidecar-like trading halt triggered during the day, staged a V-shaped rebound in just one day.

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

The shock on the previous day was even greater. SK Hynix plummeted 14.6% on the previous trading day, and Samsung Electronics also fell 9.1%. However, buying interest in Samsung Electronics shares picked up after reports emerged that AI startup Anthropic was in discussions with Samsung Electronics for custom hardware development.

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

For the same reason, the KOSPI index emerged as the hottest index in the world in 2026. After this day's rebound, KOSPI's year-to-date gain was tallied at approximately 92%, significantly outperforming the S&P 500 Index (SPX)'s 9.3% gain. Barron's viewed the rebound in the Korean stock market as a positive sign for the potential rebound of Micron in the U.S. market, which will resume on Monday after the July 4th holiday.

[Article Key Summary]

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

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

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

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