This year, Vistra Corp.’s (VST) strong rally could potentially hinder NVIDIA Corporation (NVDA) from becoming the S&P 500’s top annual performer back to back, a title held only by Advanced Micro Devices, Inc. (AMD) since 1999.However, Vistra’s stupendous gains have made the stock pricey. So, let’s look at how to trade the VST stock.Vistra (Not NVIDIA) is the S&P 500’s Top YTD GainerWall Street darling NVIDIA squashed bubble fears and witnessed a meteoric rise this year with the arrival of artificial intelli ...