Cirrus Logic (CRUS) to Join S&P MidCap 400; Amphastar Pharmaceuticals (AMPH) to Join S&P SmallCap 600

S&P SmallCap 600 constituent Cirrus Logic Inc. (NASDAQ: CRUS) will replace Fairchild Semiconductor International Inc. (NASDAQ: FCS) in the S&P MidCap 400, and Amphastar Pharmaceuticals Inc. (NASDAQ: AMPH) will replace Cirrus Logic in the S&P SmallCap 600 after the close of trading on Wednesday, September 21. ON Semiconductor Corp. (NASDAQ: ON) is acquiring Fairchild Semiconductor in a deal completed today.

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