The Dow Jones and S&P 500 held onto gains. Nvidia sank below a moving average while medical test stocks breaks out.

Learn more about whether Onto Innovation Inc. or Semtech Corporation is a better investment based on AAII's A+ Investor grades, which compare both companies' key financial metrics.

AI Optics, a biotech startup backed by NYU Langone and raising in stealth, announced clearance this week from the Food and ...