[Edaily Reporter PARK MIN ] The KOSPI surged nearly 3% shortly after the market opened on the 28th and is attempting to break through the 5,800 mark. Following the strength in semiconductor stocks on the New York Stock Exchange overnight, SK hynix reported record-high quarterly revenue of over 100 trillion won for the third quarter and announced an additional 60 trillion won shareholder return plan, significantly boosting investor sentiment.

According to MP Doctor, as of 9:10 a.m. today, the KOSPI index is trading at 5,798.80, up 160.46 points (2.85%) from the previous trading day. The index soared to 5,798.80 immediately upon opening, quickly pushing its high to just below the 5,800 mark.

In terms of supply and demand, both retail investors and foreign investors are buying, driving the index higher. Retail investors are net buyers of 64 billion won, while foreign investors are net buyers of 36.9 billion won. In contrast, institutional investors, who had engaged in large-scale buying the previous day, are net sellers of 106.1 billion won as they take profits. The number of stocks rising stands at 724, more than six times the number of stocks falling (111).

All 10 of the top KOSPI stocks by market capitalization are trading higher, signaling a positive trend across the broader market. In particular, the rally of the top two semiconductor companies is driving the overall market’s advance.

SK hynix(000660), which announced its first-ever quarterly revenue of 100 trillion won, operating profit in the 83 trillion won range, and an additional 60 trillion won shareholder return plan—all driven by surging demand for HBM (High Bandwidth Memory)—is trading at 1,368,000 won, up 2.01% (27,000 won) from the previous trading day. Investor sentiment, which had been weighed down by concerns over the IPO of subsidiary Solidym and speculation about an AI bubble, appears to have reversed instantly thanks to record-breaking earnings and shareholder-friendly policies.

SamsungElectronics(005930) Similarly, the stock is trading at 230,250 won, up 3.72% (8,250 won) from the previous trading day, easily regaining the 230,000-won mark, while SamsungElectronics(1P)(005935) is also surging 5.44% to 180,400 won. Semiconductor and electronic component stocks, including the holding company SKSQUARE(402340)(up 4.35%) and SamsungElectroMechanics(009150)(up 4.00%), are also surging by over 4%.

In addition, the leading financial stock, Samsung Life Insurance(032830), soared 6.47% to 271,500 won, and major blue-chip stocks across the board—including HyundaiMotor(005380)(3.10%), LG Energy Solution(373220)(2.75%), KB Financial Group(105560)(2.10%), and SAMSUNG BIOLOGICS(207940)(1.16%)—are all in the green, contributing to the index’s sharp rise.

At the same time, the KOSDAQ index is also riding a steep rebound, surging 24.20 points (3.25%) from the previous trading day to 768.03. In the KOSDAQ market, foreign investors are the sole net buyers, purchasing 32.2 billion won, while retail and institutional investors are net sellers of 20.3 billion won and 9.8 billion won, respectively. There were 1,321 gainers on the KOSDAQ (including 2 that hit the daily price limit), significantly outnumbering the 276 decliners.

All of the top-ranked KOSDAQ stocks by market capitalization are also showing strength. In particular, the leading robotics stock, Rainbow Robotics(277810), is trading at 385,000 won after surging 9.53% (33,500 won), and is on track to post a double-digit percentage gain. Secondary battery stocks ECOPRO CO., LTD(086520)(5.11%) and ECOPRO BM CO., LTD.(247540)(4.33%) are also surging by 4–5%, while biotech stocks—including the market cap leader Alteogen Inc.(196170)(3.89%) and HLB INC.(028300)(3.13%)—are also performing strongly.

Furthermore, buoyed by SK hynix’s strong earnings and shareholder return momentum, semiconductor materials, parts, and equipment stocks are also rebounding sharply, driven by strong rebound buying. EO Technics Co., Ltd.(039030)is trading at 411,000 won, up 4.05%, while JUSUNG ENGINEERING Co.,Ltd.(036930)(3.26%), LEENO Industrial Inc(058470)(2.61%), WONIK IPS Co.,Ltd.(240810)(1.81%), and SIMMTECH Co., Ltd.(222800)(1.45%) are also rising in tandem.

Securities analysts predicted that skepticism regarding AI infrastructure investments is rapidly subsiding on the New York Stock Exchange, partly due to news of Anthropic’s planned initial public offering (IPO). They further analyzed that investment sentiment across the entire domestic semiconductor value chain is rapidly improving, as SK hynix has clearly demonstrated robust earnings that exceeded market expectations and a strong commitment to enhancing shareholder value.

Overnight on the New York Stock Exchange, AI investment enthusiasm was reignited by Anthropic’s initial public offering (IPO), causing the tech-heavy Nasdaq Composite Index to surge 308.43 points (1.18%) to close at 26,477.81. The Dow Jones Industrial Average rose 15.99 points (0.03%) from the previous trading day to close at 52,377.57, while the S&P 500 Index closed at 7,722.60, up 45.83 points (0.60%).

In particular, the Philadelphia Semiconductor Index soared by more than 3%, and AI infrastructure stocks, such as CoreWeave, surged by over 7%. Chipmaker Broadcom rose 4.00% to $342.33, memory chipmaker Micron Technology climbed 2.77% to $928.76, and SK hynix American Depositary Receipts (ADRs) closed up 1.92% at $145.36.

Han Ji-young, an analyst at KIWOOM Securities, said, “The domestic stock market rose, buoyed by the strength of U.S. semiconductor stocks driven by positive news from Anthropic and Broadcom, as well as the easing of pressure on interest rates and oil prices due to the calming of tensions in the Middle East,” adding "During the trading session, the momentum of gains is expected to vary across sectors, influenced by SK hynix’s conference call, the Federal Open Market Committee (FOMC) meeting scheduled for early tomorrow morning, and market anticipation of hyperscaler earnings reports," she added.