The move: Super Micro Computer stock plunged 27% on Friday, prolonging a year of extreme volatility and severe price swings. The stock is up 5% year-to-date, but down 23% in the last 12 months. Why: ...

TSMC leads with 72% of Q4 2025 semiconductor foundry revenue, more than 11 times its closest competitor. Samsung, SMIC, and UMC hold single-digit shares, with no other company above 5%. The U.S.