NEW YORK, Sept. 30, 2015 /PRNewswire/ -- S&P 500 constituent Joy Global Inc. (NYSE: JOY) will replace Thoratec Corp. (NASDAQ: THOR) in the S&P MidCap 400, and Verisk Analytics Inc. (NASDAQ: VRSK) will replace Joy Global in the S&P 500 after the close of trading on Wednesday, October 7. S&P 500 constituent St. Jude Medical Inc. (NYSE: STJ) is acquiring Thoratec in a deal expected to be completed on or about that date, pending final approvals. Joy Global has a market capitalization more representative of the mid-cap market space. Joy Global Inc. manufactures and services mining equipment....
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