On July 28, 2026, American depositary receipts (ADRs) of Asian memory chip giants showed clear divergence. SK Hynix (HXSCL) continued its strong momentum, briefly breaking $210 during the session to hit a record high since listing; Samsung Electronics (SSNLF) fluctuated, closing slightly down 0.3% with a year-to-date gain of less than 5%. Behind this divergence lie fundamental differences between the two companies in high-end AI memory deployment, traditional product cycles, and capital expenditure strategies.
SK Hynix: HBM3E Volume Drives Earnings Beat
SK Hynix's recently reported Q2 2026 financials showed revenue up 72% year-on-year to 22.8 trillion won and net profit of 5.6 trillion won, both beating market expectations. Notably, high-bandwidth memory (HBM) revenue share exceeded 40% for the first time, becoming the largest growth engine. The company's fifth-generation HBM3E, in mass production since end-2025, has been delivered in large volumes to clients including Nvidia and AMD, with quarterly shipments surging over 100% quarter-on-quarter.
According to industry research firm TrendForce, the global HBM market is projected to exceed $35 billion in 2026, with SK Hynix firmly holding over 55% market share. Analysts note that as AI training and inference demand continues to expand, the HBM supply-demand gap will remain difficult to ease in H2 2026, allowing SK Hynix to further strengthen its pricing power.
On capital expenditure, SK Hynix has raised its full-year 2026 capex to 18 trillion won, focusing on expanding HBM capacity at its Icheon and Cheongju plants and accelerating the 1c-nm DRAM process conversion. Company executives stated at the earnings call that HBM shipments are expected to grow over 150% year-on-year in 2026 and maintain high growth in 2027.
Samsung Electronics: Weak Legacy Memory, Foundry Drags Valuation
Unlike SK Hynix's stellar performance, Samsung Electronics' ADR has recently been lackluster. Although the company's Q2 overall revenue edged up 3% to 78 trillion won, memory profit fell 12% year-on-year, mainly due to a 5%–8% sequential decline in legacy DRAM and NAND Flash prices in Q2 2026. Weighed by weak PC and smartphone demand, generic DRAM spot prices briefly fell below cost, forcing Samsung to control shipments.
More worrying for investors is Samsung's foundry business. Despite progress in 3nm GAA process, the division's Q2 loss widened to 1.2 trillion won, hampered by low advanced-node yields and insufficient customer orders. Counterpoint Research notes Samsung needs to raise 3nm yield above 70% by 2027, or risk falling further behind TSMC.
Capital flow data also reflect divergence: in the past month, SK Hynix ADR saw net inflows of about $480 million, while Samsung ADR experienced net outflows of $120 million. Multiple Wall Street firms recently raised SK Hynix's target price while maintaining a "neutral" rating on Samsung, believing its valuation implies an excessively high combined premium for memory and foundry.
Industry Cycle Analysis: HBM Drives Structural Growth, Legacy Memory Awaits Recovery Inflection
The memory chip industry is in a rare structural divergence. AI-related memory like HBM belongs to an incremental market, benefiting from sustained expansion in data center capex; while legacy DRAM/NAND is constrained by prolonged consumer electronics replacement cycles, with inventory digestion slower than expected. Micron Technology (MU) last week reported similar trends: HBM revenue grew 60% quarter-on-quarter, but legacy SSD revenue fell 7%, confirming this pattern.
For investors, allocating in Asian memory chip US stocks requires more focus on selection. SK Hynix, with its first-mover advantage and capacity flexibility in HBM, offers higher near-term earnings visibility; Samsung Electronics needs to be watched for whether its Q3 new flagship phones can revive consumer demand and whether its foundry business achieves a key customer breakthrough.
Looking ahead to H2, the market broadly expects DRAM prices to stabilize by end-Q3, as the effect of manufacturers' production cuts gradually emerges and AI server demand for DDR5 begins to penetrate into traditional server areas. If peak-season demand meets expectations, traditional memory giants like Samsung could see valuation repair opportunities.
As of the close on July 28, the iShares PHLX Semiconductor Index (SOXX) edged up 0.2%, with the memory chip sector's overall valuation at an above-median historical level. Cross-border investors should focus on the upcoming next-quarter guidance from companies due in August, to assess the sustainability of AI orders and signs of a bottom in traditional businesses.
