2018's Biggest Winners So Far

With the first half of 2018 now in the books, these are the top 10 best-performing stocks in the entire S&P 500 index for the first six months of the year:

1. Fossil Group, up 215 percent
2. ABIOMED, up 114 percent
3. Netflix, up 95 percent
4. Twitter, up 80 percent
5. XL Group, up 62 percent
6. Tripadvisor, up 60 percent
7. Under Armour, up 59 percent
8. Align Technology, up 53 percent
9. Chipotle Mexican Grill, up 50 percent
10. Macy's, up 44 percent