SEOUL, July 10 (AJP) - Few Korean stocks have rewarded investors—or punished them—as dramatically as SK hynix.
The memory chipmaker, whose Nasdaq American depositary receipts became the largest U.S. equity offering ever by a foreign issuer this week, once traded at just 135 won, making it one of the cheapest technology shares on the Korea Exchange and a dismal reminder of Korea Inc.'s collapse in the aftermath of the Asian financial crisis.
Its fortunes have ridden the semiconductor industry's roller-coaster boom-and-bust cycle ever since.
Originally founded as Hyundai Electronics, the company entered the memory-chip business in 1983 and listed on the Korea Stock Exchange in December 1996 at 20,000 won per share. The stock briefly climbed to 49,600 won before the Asian financial crisis upended the country's corporate landscape and the global chip industry.
A government-led restructuring forced Hyundai Electronics to acquire LG Semicon in 1999. The deal created a larger national memory champion but also saddled the company with heavy debt just as global DRAM prices collapsed.
The breakup of Hyundai Group following the financial crisis added to the strain, pushing the chipmaker into a severe liquidity crunch.
Renamed Hynix Semiconductor in 2001, the company entered creditor-led restructuring as mounting losses and debt pushed it toward collapse. By 2003, its shares had plunged to 135 won.
Foreign and institutional investors largely abandoned the stock, leaving it dominated by short-term retail traders willing to gamble on its survival.
The recovery was anything but immediate. Hynix returned to profitability in 2003 and exited creditor management in 2005, but another memory downturn and the 2008 global financial crisis dragged its shares back toward 5,000 won. The repeated reversals reinforced the market's view of memory chips as one of the technology industry's most punishingly cyclical businesses.
The decisive turning point came in 2012, when SK Telecom acquired control of Hynix for about 3.4 trillion won, ending more than a decade of financial uncertainty and giving the company the resources to pursue long-term technological investments.
The company was subsequently renamed SK hynix.
The acquisition gave the chipmaker not only capital but also the patience to invest through another uncertain phase of the memory cycle. SK hynix poured money into advanced memory technologies, including high-bandwidth memory, years before artificial intelligence created explosive demand for the product.
The company developed the world's first HBM in 2013, when the technology had few obvious commercial applications. Demand remained limited for years, but SK hynix continued investing while rivals treated the product as a niche segment.
That persistence eventually reshaped the company. As Nvidia's AI accelerators became the backbone of generative artificial intelligence, HBM emerged as one of the world's most strategically important semiconductor products. SK hynix's early lead allowed it to become the dominant supplier just as AI infrastructure spending began to surge.
Investors rewarded that technological advantage with one of the sharpest re-ratings ever seen in South Korea's stock market. SK hynix shares climbed from around 250,000 won in July 2025 to nearly 3 million won less than a year later, briefly making the company South Korea's most valuable listed corporation.
Even after retreating to 2.186 million won as of Thursday, the stock remained almost tenfold higher than a year earlier, ranking it among the world's best-performing large-cap semiconductor shares.
The rally unfolded in several waves.
The shares spent much of the second half of 2025 below 500,000 won before breaking above 1 million won in April 2026. They crossed 2 million won the following month and approached the 3 million-won mark in June as optimism over record earnings, expanding AI infrastructure investment and the Nasdaq ADR offering intensified.
The rise was not merely a surge in price. It also marked a fundamental reassessment of what kind of company SK hynix had become.
According to KRX Data Marketplace, its price-to-earnings (PER) ratio climbed from 10.34 times on July 10, 2025, to a peak of 47.05 times in late June 2026 before easing to 35.81 times.
The dramatic expansion reflected investors' growing willingness to value SK hynix less like a conventional memory producer and more like an essential supplier to the global AI industry.
Foreign investors remained central to the rally. They owned approximately 50.01 percent of SK hynix shares as of July 10, according to Korea Exchange data. Although foreign ownership had declined from a peak of 56.25 percent in September 2025 as investors locked in gains, overseas shareholders still controlled about half of the company.
Institutional participation also expanded through semiconductor-focused funds and single-stock leveraged exchange-traded funds, drawing a wider range of investors into a stock that had once been treated largely as a speculative turnaround bet.
This week's Nasdaq ADR debut marked another milestone rather than the beginning of the transformation. For many investors, the listing represented the culmination of a comeback that began more than two decades ago, when Hynix was fighting simply to survive.
The ADRs were priced at $149 each, raising approximately $26.5 billion in the largest U.S. equity offering ever by a foreign issuer. Each ADR represents one-tenth of a common share, with the offer priced at a slight premium to the company's Seoul-listed stock.
The blockbuster deal offered a stark contrast to the company's darkest period.
A chipmaker once reduced to a 135-won penny stock had returned to global capital markets as the world's leading AI memory supplier and the issuer of Wall Street's largest-ever foreign share sale.
Whether the current AI boom proves to be another turn in the semiconductor cycle or the beginning of a structural shift remains one of the market's biggest debates.
But few companies have traveled farther than SK hynix.
Its journey from a debt-ridden casualty of Korea Inc.'s post-crisis collapse to one of the world's most valuable AI chipmakers has already secured its place as one of the most extraordinary corporate turnarounds in South Korean capital-market history.
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