Japan and South Korea Stocks Rally; SK Hynix’s US IPO Sparks Market Frenzy

Introduction

On June 25, 2026, Asian financial markets saw a significant rebound, with Japan and South Korea stocks surging. Investor confidence recovered notably. Amid global economic uncertainties, the rally drew wide attention. SK Hynix hit a new record high and filed for a US IPO on Nasdaq, deepening its global capital market strategy and offering new investment opportunities. This article analyzes the market performance, SK Hynix’s international expansion, and Korea’s financial regulatory dynamics.

Japan and South Korea Stocks Rebound Strongly; Market Sentiment Improves

As of the close on June 25, Japan’s Nikkei 225 surged 4.61% to 72,366.34, indicating increased investor confidence in Japan’s economic outlook. After a period of adjustment, this rebound shows the market is absorbing uncertainties and reassessing fundamentals.

Meanwhile, South Korea’s KOSPI jumped 5.43% to 8,930.78, driven partly by the semiconductor sector, especially SK Hynix’s explosive rise. Overall, the rally reflects regional capital market linkages and investor focus on technology, particularly the semiconductor supply chain.

SK Hynix Soars; US IPO Ignites Market Rally

In South Korea’s stock market, SK Hynix was the brightest star. Its share price rose over 15% intraday and closed up 13.06% at a record high of KRW 2.93 million per share. The surge was closely tied to the company’s major capital move announced that day.

The same day, SK Hynix formally filed an IPO application with the U.S. Securities and Exchange Commission (SEC) for listing on Nasdaq under ticker “SKHY.” This marks a key step in the global semiconductor leader’s capital market expansion. According to the prospectus, global top investment banks including Bank of America Securities, Citigroup, Goldman Sachs, and JPMorgan Chase will serve as underwriters. This highlights SK Hynix’s influence in global capital markets and reflects international investors’ strong recognition of its long-term growth potential.

SK Hynix disclosed its leading position in the High Bandwidth Memory (HBM) market. Data shows the company is projected to hold a 56.4% share of the global HBM market by Q1 2026, firmly ranking first. HBM, a core memory technology for AI and high-performance computing, sees growing demand. SK Hynix’s technological edge and market share provide a solid business foundation for its IPO.

Revenue Structure Reveals Global Expansion; China Market Gains Prominence

Notably, SK Hynix detailed its revenue regional distribution in the prospectus. Data shows sales subsidiaries in the US contributed 64.7% of total revenue in Q1 2026, compared to 68.8% in 2025, indicating the US remains the most important revenue source and reflects its strategic position in the global semiconductor supply chain.

Meanwhile, the revenue share from Chinese subsidiaries significantly increased. In Q1 2026, Chinese subsidiaries contributed 24.3% of total revenue, up from 19.7% in 2025. The rapid growth reflects SK Hynix’s success in capturing China’s semiconductor demand and its continued deep presence in the world’s largest consumer electronics market.

This revenue shift illustrates the dynamic adjustment of the global semiconductor industry and SK Hynix’s strategic intent to balance development between the US and China markets. Against the backdrop of increasingly complex US-China tech competition, such diversified deployment helps mitigate single-market risk and enhance resilience.

Korea Exchange Delays Single-Stock Weekly Options; Market Stability Priority

Amid the stock rally, the Korea Exchange also released an important policy signal. On June 25, the exchange stated in a statement that it would postpone the launch of single-stock weekly options originally scheduled for June 29, citing recent market conditions. The exchange emphasized the products will be launched at an appropriate time based on market conditions and overall readiness.

The planned weekly option contracts were targeting four core Korean stocks: SK Hynix, Samsung Electronics, Hyundai Motor, and LG Energy Solution. This decision reflects regulators’ cautious approach to balancing financial innovation and market stability. In a volatile market with sensitive investor sentiment, postponing high-leverage products helps prevent excessive speculation and protect retail investors.

Conclusion

The strong performance of Japan and South Korea stocks on June 25, 2026, reflects both a phase of market sentiment repair and the resonance between sound corporate fundamentals and capital operations. SK Hynix’s record high and formal US IPO launch underscore its leading position and long-term growth potential in the global semiconductor sector. Meanwhile, the Korea Exchange’s delay of single-stock weekly options reminds the market that financial innovation must be premised on market stability.

Looking ahead, as SK Hynix lists on Nasdaq, global investors will have more direct access to the growth of this Korean semiconductor leader. Whether Japan and South Korea stocks can sustain the rally will depend on global economic conditions, geopolitical risks, and tech industry cycles. In an environment of both opportunities and challenges, rational investment and prudent positioning remain the principles market participants should uphold.