Hot off the press from our scan engine, 51 of the 500 stocks in the S&P 500 are up over 50% over the last 250 trading days, which is around one year. That's just over 10%, which makes for a pretty amazing year. 3 stocks are up more than 100% for the year. Netflix, which was added to the index on December 10th, is the top performer. Cummins and F5 Networks are the other two.