Seoul's Chip Crash Whips U.S. Memory Stocks: Samsung Decline Triggers SanDisk and Peers Lower

On June 23, South Korea's KOSPI index fell 10% on sharp declines in Samsung and other chipmakers. That same day, SanDisk plunged 11% while Western Digital and Micron each dropped roughly 10%. The tight correlation between Samsung's memory pricing signals and the global supply chain means sentiment swings in Seoul now override company-specific guidance in U.S. trading—a contagion risk that matters for anyone holding memory stocks.