On Nov. 20, Nvidia reported financial results for its fiscal 2025 third quarter, showing stunning 94% year-over-year revenue growth. The business is absolutely booming, and so is the stock price. As of this writing, Nvidia stock is up close to 200% year to date.As impressive as those returns are for Nvidia, it's not the best-performing stock in the S&P 500 (^GSPC 0.35%) this year. That distinction presently belongs to energy company Vistra (VST -2.81%), which has gained 332% in 2024.Vistra provides resident ...