S&P 500 Movers: STJ, KLAC
October 21, 2015 at 10:15 AM EDT
In early trading on Wednesday, shares of KLA-Tencor (KLAC) topped the list of the day's best performing components of the S&P 500 index, trading up 24.3%. Year to date, KLA-Tencor has lost about 4.8% of its value.
