On June 22, 2026, SK hynix briefly surpassed Samsung Electronics in market capitalization, a seismic shift in the Korean stock market for the first time in over 25 years.
This historic event is rooted in the explosive demand for AI infrastructure and the resulting scarcity of High Bandwidth Memory (HBM). Investors are currently placing a massive premium on companies with a proven, immediate supply of HBM. This is clearly visible in the valuation gap: as of mid-June, SK hynix traded at a price-to-sales (P/S) ratio of about 14.6, a staggering 140% premium over Samsung's 6.1. The market is rewarding SK hynix's 'certainty of supply now' over Samsung's 'certainty of scale later'.
Several key events in the preceding weeks set the stage for this reversal. First, on June 18, a Reuters report confirmed SK hynix had shipped samples of its next-generation HBM to major customers, reiterating its status as Nvidia's primary supplier. This news provided a powerful, last-minute credibility boost, assuring investors of its technological lead.
Second, the market had been primed for a leadership change. Throughout late May and early June, news reports celebrated SK hynix crossing the $1 trillion market value milestone, framing the dynamic as a "two-horse race." As the gap with Samsung narrowed, an intraday flip became not just possible, but probable.
Third, a minor but notable headwind appeared for Samsung. In mid-May, its union threatened a strike, and although it was quickly resolved, the episode introduced a small element of "operational execution risk" into its narrative. This contrasted sharply with SK hynix's story of flawless execution, subtly depressing Samsung's relative valuation.
Looking further back, other factors solidified SK hynix's momentum. In March, SK hynix announced a massive $8 billion order for EUV equipment from ASML, signaling an aggressive expansion plan that bolstered long-term confidence. Even Samsung's record-breaking profit announcement in April inadvertently helped SK hynix; by confirming a memory super-cycle, it amplified the premium on the company best positioned to capitalize on it immediately.
Ultimately, the flip was not a sudden shock but the culmination of a clear trend. It was driven by SK hynix’s first-mover advantage and execution in the HBM market, a critical component for the AI revolution that investors are willing to pay handsomely for today.
- HBM (High Bandwidth Memory): A type of high-performance memory crucial for AI processors like GPUs, enabling them to process vast amounts of data quickly.
- Market Capitalization: The total market value of a company's outstanding shares, calculated by multiplying the share price by the number of shares.
- P/S Ratio (Price-to-Sales Ratio): A valuation metric that compares a company's stock price to its revenues. A high P/S ratio can indicate that investors expect high future growth.