- Vertex (VRTX) +3.4% AH and Ametek (AME) +1.2%. AMD -0.5% AH and SAIC (SAI) -0.1% (those declines might get bigger before the dust settles). AMD and SAIC are joining the S&P MidCap 400, and Vertex and Ametek are leaving it. The changes will take place after the Sep. 20 close.
- Also: Capstead Mortgage (CMO) is replacing Rue 21 (RUE) in the S&P SmallCap 600 following the Sep. 19 close. CMO +2.9% AH.
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