KLA is trading 10.1% down today at $171.50 after a sharp post-earnings reversal and heavy semiconductor sector pressure.

  • Despite beating Q4 revenue and EPS estimates and raising guidance on July 28, investors are selling KLA along with other chip names.
  • The decline is driven by growing worries about an AI chip bubble, tougher China competition in chipmaking tools, and broader risk-off sentiment in the tech and semiconductor space.