AI stocks rebound sharply: Micron surges 12.2%, Nvidia up 2%

Micron jumped 12.2% and Nvidia rose 2% to $91.01 on July 21, 2026, per AP — one session after a global AI sell-off dropped the Dow 406 points. Thin liquidity (few active traders) and crowded positioning (many investors holding the same stocks) are amplifying swings in AI names, directly hitting retirement balances heavy in megacap tech.