Semiconductor stocks held firm even as U.S. Treasury yields climbed to their highest levels since 2007, while South Korea's KOSPI attempted to reclaim the 7,000 mark.

The resilience of chip equities stands out against a bond market sending warning signals. Rising Treasury yields typically pressure growth-oriented technology shares by raising discount rates on future earnings, yet semiconductor names resisted that drag in the latest session.

Korea's benchmark index, home to the world's two largest memory makers, Samsung Electronics and SK Hynix, pushed toward the psychologically important 7,000 level. The move reflects investor confidence in the memory and logic chip cycle despite macro headwinds from U.S. interest rates.

The 2007 comparison underscores how far yields have climbed. The last time U.S. borrowing costs sat at current levels, the smartphone era had barely begun and the semiconductor industry was a fraction of its present size. That chip shares can absorb such rate pressure suggests sector-specific momentum — driven by demand for AI, memory and advanced logic — currently outweighs macro tightening for investors.

For semiconductor suppliers, the dynamic matters commercially. A strong KOSPI lowers the cost of capital for Korean chipmakers funding capacity expansion, and firm equity valuations across the sector support the investment climate needed for multi-year fab projects. Conversely, sustained high U.S. yields raise financing costs for capital-intensive expansion plans in the West.

How long semiconductors can decouple from the bond market remains the open question. If Treasury yields keep climbing and the KOSPI fails to hold near 7,000, equity support for the sector's aggressive capacity roadmap could face its first real stress test.