South Korean Stock Market Surges 18% as AI Rally Returns; Samsung and SK Hynix Shares Jump Over 23%

South Korea's benchmark KOSPI index recorded its biggest-ever single-day percentage gain, soaring 18% on Friday as a powerful rebound in artificial intelligence (AI) and semiconductor stocks reignited investor optimism. Chip giants Samsung Electronics, SK Hynix, and Taiwan's TSMC led the rally, while global technology shares also gained momentum following strong signals from Wall Street.

AI and Chip Stocks Power Historic KOSPI Surge

The historic rally came after three consecutive sessions of heavy selling in technology stocks. Renewed confidence in the artificial intelligence sector triggered aggressive buying, pushing South Korea's stock market to its strongest single-day performance on record.

Semiconductor manufacturers emerged as the biggest winners, reflecting growing expectations that AI-driven demand for advanced chips will remain strong despite recent market volatility.

Samsung and SK Hynix Lead the Gains

South Korea's technology heavyweights dominated trading activity.

SK Hynix shares surged more than 23%

Samsung Electronics jumped over 23%

TSMC shares climbed around 10%

These companies became the biggest contributors to the MSCI Asia Pacific Equities Index, highlighting the semiconductor sector's continued influence on global equity markets.

Emerging Markets Rally Alongside Asian Stocks

The positive momentum spread across global emerging markets.

The MSCI Emerging Markets Index advanced 6.1%, marking its strongest single-day gain in six years. Meanwhile, the index tracking emerging-market currencies strengthened by 0.3%, reflecting improving investor sentiment toward risk assets.

Wall Street's Chip Rally Boosts Global Confidence

Asian markets followed a powerful rally in US semiconductor stocks, where chip companies posted their biggest gains in more than a year.

The technology-heavy Nasdaq 100 also signaled continued strength after ending a six-session losing streak, reinforcing optimism across global equity markets.

Mixed Earnings from Tech Giants

Corporate earnings also influenced market sentiment.

Amazon shares jumped as much as 9.5% in after-hours trading after reporting stronger-than-expected quarterly results.

Apple shares fell more than 6% after supply chain challenges impacted the company's sales outlook.

Despite mixed earnings, investors largely focused on the long-term growth prospects of AI-related businesses.

Investors Find Relief After Three-Day Sell-Off

The sharp rebound provided much-needed relief after technology stocks witnessed significant selling pressure earlier in the week.

Investor concerns had centered on whether massive AI investments by global technology companies would generate sufficient long-term returns. Friday's rally suggested renewed confidence in the sector's growth outlook.

Global Markets Eye the Federal Reserve and Inflation

Investors are now watching upcoming US Federal Reserve policy developments and broader economic indicators for further direction.

Meanwhile, rising crude oil prices have increased inflation concerns. However, improving shipping activity through the Strait of Hormuz has helped ease some pressure on global energy markets, with Brent crude prices moderating slightly.

What Are the KOSPI and MSCI Emerging Markets Index?

The KOSPI (Korea Composite Stock Price Index) is South Korea's benchmark stock market index, representing the country's largest listed companies, including Samsung Electronics and SK Hynix.

The MSCI Emerging Markets Index, developed by Morgan Stanley Capital International (MSCI), tracks the performance of major emerging economies such as India, South Korea, China, Brazil, and others, making it one of the world's most closely watched emerging-market benchmarks.

The record rally highlights renewed investor confidence in AI-driven technology companies and reinforces the semiconductor industry's central role in the global market recovery.