Group 1 - CRH Cement, Carvana, and Comfort Systems USA will be added to the S&P 500 index during the quarterly adjustment at the end of December, while LKQ Corp., Solstice Advanced Materials, and Mohawk Industries will be removed [1][4] - Following the announcement, Carvana and CRH Cement's stock prices rose approximately 7%, while Comfort Systems USA's stock increased by about 2% in after-hours trading [1] - Carvana's stock price has surged from under $4 in 2022 to around $400 currently, marking a 10,000% increase, attributed to cost-cutting and debt restructuring efforts that improved profitability [1] Group 2 - The rise of passive investing has made inclusivity in U.S. stock indices increasingly important, as funds tracking these indices will increase demand for stocks [4] - Companies must have a market capitalization of at least $22.7 billion and meet profitability, liquidity, and stock float requirements to qualify for inclusion in the S&P 500 index [4] - Analysts predict that Carvana, CRH Cement, and Comfort Systems USA are quality candidates for inclusion, with Carvana's stock up nearly 100% year-to-date [4]