NEW YORK, Oct. 2, 2013 /PRNewswire/ -- American Assets Trust Inc. (NYSE: AAT) will replace Sourcefire Inc. (NASD: FIRE) in the S&P SmallCap 600 after the close of trading on Monday, October 7. S&P 100 & 500 constituent Cisco Systems Inc. (NASD: CSCO) is acquiring......
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