SK Hynix Q2 Profit Surges 557% Yet Misses Targets Amid HBM4 Push

Woofun AI reports that SK Hynix’s second-quarter operating profit reached a record high, yet the figure fell short of analysts' expectations, triggering immediate volatility in U.S. stock market hours on July 28. The Korean semiconductor giant announced its financial results after the close of trading, revealing an operating profit surge of 557% year-on-year to 60.5 trillion won, alongside revenue growth of 257% to 79.3 trillion won. Despite these record-breaking metrics, the market reaction was negative; SK Hynix’s American Depositary Receipts (ADR) dropped more than 5% in after-hours trading, while local Korean stocks declined 4.5% before the market opened, reflecting deepening concerns about valuation sustainability.

The discrepancy between actual performance and market forecasts is quantifiable. Analysts had projected an operating profit of approximately 64.2 trillion won and revenue of around 83.9 trillion won for the quarter. SK Hynix’s actual operating profit of 60.5 trillion won and revenue of 79.3 trillion won both missed these benchmarks. This gap, despite the massive year-on-year growth, highlights the elevated baseline against which the company is now being measured. The market’s anticipation of even higher figures underscores the intense scrutiny placed on SK Hynix as a primary beneficiary of the AI infrastructure build-out.

Strategic positioning remains strong, with SK Hynix confirming it has finalized long-term agreements with approximately 10 major customers. These contracts are part of a broader effort to enhance operational efficiency and stabilize medium- to long-term business outlooks.

However, this strategic stability has not insulated the company from recent market value erosion. Since June, SK Hynix has seen its market capitalization evaporate by over $500 billion, with a single-month decline at one point erasing about 45% of its stock value. The post-earnings drop further illustrates the tension between fundamental strength and market sentiment.

Detailed financial metrics reveal the scale of the current super cycle in the memory industry. SK Hynix reported second-quarter revenue of 79.3187 trillion won, a significant increase from 22.232 trillion won in the same period last year, representing a 257% year-on-year growth. Compared to the first quarter’s revenue of 52.5763 trillion won, this marks a sequential growth of over 50%. Operating profit reached 60.5426 trillion won, up 557% from 9.2129 trillion won year-on-year, and increased by about 61% from the first quarter’s 37.6103 trillion won. These figures demonstrate the rapid acceleration in profitability driven by high-demand products.

Profitability margins have reached unprecedented levels, with the operating profit margin in the second quarter hitting 76.3%, up from 71.5% in the first quarter.

Woofun AI data shows that the gross profit margin reached 83%, driven by strong prices and demand for high-value-added products such as AI server memory, HBM, and eSSD. Net profit soared to 93.9226 trillion won, with a net profit margin of 118%.

However, this net profit figure is significantly influenced by one-time investment gains. Specifically, the company recognized non-operating income of 62.166 trillion won from the partial sale of Kioxia shares, bringing pre-tax profit to 122.7084 trillion won. While this boosts headline earnings, the sustainability of such gains is weaker than that of core operating profits.

The failure to meet expectations stems from three structural factors. First, the high proportion of HBM sales limits profit growth potential compared to traditional general-purpose memory, where price surges are more pronounced. Second, memory price increases slowed in the second quarter; general DRAM prices rose about 30% quarter-on-quarter, and NAND flash prices increased in the mid-range of 50% to 60%, down from the first quarter’s increases of about 60% for DRAM and 70% for NAND. Third, long-term supply agreements (LTA) with major customers have locked in sales prices, reducing the profit elasticity from rising spot prices. Reports indicate that sales locked in through these long-term agreements account for about 50% of total sales.

Josh Gilbert, Chief Analyst for Etoro Asia-Pacific and the Middle East, noted that as the dominant supplier of high-bandwidth memory driving Nvidia chips, SK Hynix’s profit statement directly reflects the AI boom.

However, he emphasized that the market is unlikely to focus solely on top-line numbers. The more critical question is whether profit margins and performance guidance can support recent stock price performance. This commentary highlights the shift in investor focus from absolute growth rates to the sustainability of margins and the ability to maintain leadership in a rapidly evolving technological landscape.

HBM4 production is accelerating, with the company stating that HBM4 has reached operational speeds required by customers and possesses industry-leading energy efficiency and cost competitiveness. Large-scale shipments began in the second quarter, with further production expansion planned for the second half. The next-generation HBM4E has also completed sample deliveries to major customers in the first half of the year, utilizing an optimal process that balances technological maturity and mass production stability. This progress is crucial, as HBM4 will be a key supporting memory for the next stage of AI accelerator platforms. The market expects that the mass production of Nvidia’s next-generation AI accelerator platform will serve as a significant catalyst for HBM4 demand in the second half.

In the NAND sector, SK Hynix is accelerating the transition to advanced process nodes to strengthen its high-capacity, high-performance product portfolio. 321-layer products have become the highest proportion of total output, with plans to expand this to about 50% of domestic capacity in South Korea by the end of the year. Enterprise-grade SSDs (eSSD) remain an important incremental growth area, as AI data centers require large-scale, high-performance, and highly reliable storage devices. The demand for eSSD has strengthened alongside cloud vendors and large tech companies expanding their AI clusters, helping SK Hynix improve the quality of its NAND product portfolio. This structural shift distinguishes the current memory cycle from past upcycles driven by consumer electronics.

Financial health has improved significantly, with cash and cash equivalents reaching 88 trillion won at the end of the second quarter, an increase of 33.6 trillion won from the previous quarter. Total debt decreased by 0.7 trillion won to 18.6 trillion won, expanding the net cash position to 69.4 trillion won. Despite this strong balance sheet, capital expenditures are expected to rise, reaching the upper end of the range of 40 trillion to 50 trillion won by 2026. The company is accelerating the mass production progress of M15X and preparing to rapidly expand capacity after the cleanroom of Yongin Phase I is put into operation in early 2027.

Additionally, medium- to long-term investment plans include advanced packaging facilities P&T7, M17 NAND production bases, and new semiconductor clusters, all to be advanced in phases based on customer demand and investment efficiency.