Micron Shares Plunge 13% as South Korean ETF Warnings Spark Chip Sell-Off

Key Facts

1Micron shares tumbled 13% following warnings from South Korean ETFs that fueled a broader chip sector sell-off.

2Sandisk shares also slid premarket following a rout in the South Korean tech sector.

Amid mounting concerns over the sustainability of the AI-driven tech rally, the semiconductor sector faced intense selling pressure that hit major manufacturers. Micron shares tumbled 13% following warnings from South Korean ETFs, which fueled a broader sector sell-off. Sandisk shares also slid premarket, tracking a significant rout in the South Korean tech sector that dampened investor sentiment globally.

This decline occurs as investors scrutinize peer performance; for instance, Samsung's recent financial reports indicated margin pressures in its memory division per market data. The rapid exit from chip-making equities highlights the sector's sensitivity to ETF flows, which have become a primary driver of liquidity and price action for mega-cap semiconductor firms in recent months.

As of the close on June 23, 2026, MU was priced at $1,046.43, having touched a session low of $1,038.50 according to market data. Traders are now looking toward upcoming economic catalysts and the impact of the Fed's June 17 decision to hold rates at 3.75%, which remains a critical factor for the valuation of high-growth technology stocks in the near term.