SK Hynix (000660.KS) Targets 21% Upside as Q3 Revenue Jumps 328%

SK Hynix (000660.KS) maintains a Buy rating with a KRW 1,800,000 target in October 2026. Q3 revenue surged 328% YoY to KRW 104.6T, driven by HBM4 mass production and strong AI memory demand.

The HBM4 Inflection Drives Exceptional Q3 Growth SK Hynix (KRX: 000660.KS) has transitioned from a structural AI-memory thesis to an execution-led supercycle. The company reported extraordinary Q3 2026 results, with revenue surging 328% year-over-year to KRW 104.6 trillion. Operating profit mirrored this explosive growth, climbing 632% to KRW 83.3 trillion, yielding a peak-cycle operating margin of approximately 79.7%. This financial momentum is anchored by the successful rollout of HBM4 . Management confirmed that full-scale mass production commenced in Q3 2026, with yields already exceeding planned targets. HBM4 is projected to surpass HBM3E in both shipment volume and revenue by Q4 2026, cementing the company's leadership in the AI memory space. Does SK Hynix Deserve a Buy Rating? Analyzing the Upside With the stock trading at KRW 1,487,000 as of late October 2026, the critical question for investors is whether SK Hynix still offers meaningful upside. Current analysis maintains a BUY rating with a base-case target of KRW 1,800,000, implying an approximate 21% upside potential. The valuation scenarios highlight a compelling, albeit risk-adjusted, profile: Bull Case (25% Probability): Target of KRW 2,606,000 (+75% upside) if HBM4 yields continue to beat expectations and market multiples re-rate for supercycle growth. Base Case (40% Probability): Target of KRW 1,800,000 assuming HBM4 ramps in line with expectations and AI-memory growth multiples are maintained. Bear & De-rating Cases (35% Combined Probability): Targets ranging from KRW 700,000 to KRW 900,000, factoring in potential margin normalization and hyperscaler capex digestion. The rating remains a "Buy" rather than a "Strong Buy" because current operating margins near 80% are peak-cycle anomalies driven by scarcity pricing, not sustainable mid-cycle baselines. Long-Term Agreements Provide Unprecedented Visibility SK Hynix has successfully mitigated traditional memory-cycle opacity through strategic Long-Term Agreements (LTAs). Key visibility metrics include: Capacity Coverage: LTAs secure more than 50% of total capacity for 2027 and 2028. Sold-Out Status: Management notes that DRAM and HBM volumes are "effectively sold out" through 2029. Capital Returns: Exceptional free cash flow generation supports a massive KRW 100 trillion shareholder return plan for FY2026. While these agreements reduce demand uncertainty, they do not eliminate price cyclicality. The contracts feature pricing mechanisms that respond to market conditions, meaning margin compression remains a risk if industry supply increases. Competitive and Geopolitical Risks to Monitor Despite its dominant market position, SK Hynix faces intensifying supply elasticity . Competitors like Samsung and Micron are aggressively scaling their own HBM capabilities, which could eventually compress HBM pricing back toward mid-cycle economics. Additionally, SK Hynix expects a material step-up in capital expenditure in 2027, which will increase depreciation costs. Geopolitical constraints also require careful monitoring. China represented 19.7% of FY2025 revenue, and the company's manufacturing operations in the region now rely on annual U.S. equipment licensing rather than structural exemptions, presenting a recurring operational risk. Disclaimer: This content is generated by AI. While we strive to ensure accuracy, please use this information for educational purposes only.