Overnight Korean Selloff Extends to US Tech Stocks: June 23, 2026 — 2026-06-23
What moved & why: Circuit breaker selloff in South Korea sparked by SK Hynix redirecting to cheaper chip products, signaling potential AI capex slowdown as customers complain about unreasonably high tech costs. Contagion extended to US tech stocks, though cyclical strength from robust manufacturing data and private-sector hiring limited broader damage.
Cross-asset:
- Equities: Dow Jones only major benchmark advancing; 7 of 11 principal sectors climbing despite tech weakness. Memory chip providers bore brunt of selloff.
- Rates/Treasuries: Treasury yields falling on softening inflation expectations; author favors 10+ year duration as attractive hedge, citing potential for 30 bps decline and possible yield curve inversion if Kevin Warsh tightens. Yield curve at flattest in 15 months.
- Dollar: Strengthened significantly on safe-haven demand, offsetting bearish currency impact from lower rates.
- Commodities: Retreating amid risk-off sentiment; cheaper oil prices cited positively by survey respondents.
- Crypto: Retreating alongside commodities; hedging demand rising with index downside protection seeing heavier premiums.
Econ / Fed angle: June Flash Manufacturing PMI surged to 55.7 (strongest in 49 months), while Services PMI at 51.3. ADP private payrolls accelerated to 30.75k/week average (132k monthly run rate). May CPI peaked at 4.2%; June inflation retreating to 3-handle on tumbling fuel and slowing rent/housing. Data supports soft landing narrative but AI capex concerns could temper growth outlook; potential for rate cuts if slowdown anxiety intensifies.
Watch next: AI earnings season and capex guidance; potential Kevin Warsh hawkishness and yield curve inversion dynamics; eurozone contraction (PMI 49.5) and Japan expansion (PMI 52.5) trajectories; Middle East supply chain risks flagged by Japanese firms.