Article: Notable After Hour Movers MKSI YRCW DELL ET HD.

M2 PRESSWIRE-15 December 2006-Web Karma LLC: Notable After Hour Movers MKSI YRCW DELL ET HD(C)1994-2006 M2 COMMUNICATIONS LTD

RDATE:15122006

MKS Instruments Inc. (NASDAQ: MKSI) 3.27% HIGHER; will replace Aleris International Inc. (NYSE: ARS) in the S&P SmallCap 600 after the close of trading on Tuesday, December 19.

MKS Instruments, Inc. is a leading worldwide developer, manufacturer and supplier of instruments, components and subsystems used to measure, control and analyze gases in semiconductor manufacturing and similar industrial manufacturing processes. They offer a range of products including but not limited to semiconductors, optical ...

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