2018's Biggest Winners

In 2019, even the winners had a roller-coaster ride. The biggest-gaining stock in the S&P 500, Advanced Micro Devices, was up 79.6 percent on the year - even though it lost 40 percent of its value in the fourth quarter.

The Top Ten biggest winners in the S&P last year:

1. Advanced Micro Devices (AMD), up 79.6 percent
2. Abiomed (ABMD), up 73.4 percent
3. Fortinet (FTNT),  up 61.2 percent
4. Advance Auto Parts (AAP), up 57.9 percent
5. TripAdvisor (TRIP), up 56.5 percent
6. Chipotle Mexican Grill (CMG), up 49.4 percent
7. Keysight Technologies (KEYS), up 49.2 percent
8. Red Hat (RHT), up 46.2 percent
9. O'Reilly Automotive (ORLY), up 43.1 percent
10. Boston Scientific (BSX), up 42.6 percent