All five stocks have delivered triple-digit returns in 2024.The S&P 500 (^GSPC 1.23%) is up 20% through Nov. 1. But within the index, these five stocks have produced even higher returns with each one more than doubling this year. 1. VistraVistra (VST 5.32%) stock is up 210%. The company sells electricity and also produces power (including nuclear) and renewable fuels.The gains have partly been driven by the growing need for electricity, particularly among technology companies with large data centers, like M ...