Question: what is the best performing stock in 2018?
Answer: ABIOMED, Inc. (ABMD) Opening price on Jan.
Advanced Micro Devices (AMD) Opening price on Jan. 2: $10.42. ... 
TripAdvisor, Inc. (TRIP) Opening price on Jan. ... 
Fortinet, Inc. (FTNT) ... 
Advance Auto Parts, Inc. (AAP) ... 
Chipotle Mexican Grill, Inc. (CMG) ... 
Netflix, Inc. (NFLX) ... 
HCA Healthcare (HCA) Opening price on Jan. ...