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Tech stocks tumble in Asia, US

Jun 24, 2026, 6:21am EDT
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South Korea’s KOSPI benchmark tops 8,000 for the first time.
Kim Hong-Ji/Reuters

Turbulence in Asian tech stocks spread to Wall Street, with investors worried about rate hikes, massive spending, and overvaluation.

Sandisk and Micron, memory-makers which had seen huge gains in recent months, both tumbled around 13% as part of a broader Nasdaq fall of 2.2%. Surges are often followed by rapid reversals, The Wall Street Journal reported, noting that the memory firms’ shares are still up 727% and 269%, respectively, this year.

Investors are jittery, leaving markets unstable: South Korea’s KOSPI index in particular went on a rollercoaster ride, falling 10% on Tuesday before clawing a good chunk back. The index’s volatility is at a record high, the Financial Times reported.

 A chart showing the Philadelphia Semiconductor Index performance.
— Tom Chivers
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