FormFactor is trading 4.15% lower at $141.85, with no clear company-specific news explaining the October 6 decline.

  • FormFactor’s move from the S&P SmallCap 600 into the S&P MidCap 400 took effect before the market opened, but available reporting does not establish it as the cause.
  • The S&P 500 is up 0.58% and the Nasdaq Composite is up 0.48%.
  • Shares were reported lower on below-average volume earlier in the session.