1. Carvana will join the S&P 500 in two weeks, boosting share demand. 2. Stock jumped nearly 10% in premarket trading, reflecting strong market turnaround. 3. Hedge funds made $540 million in profits from their Carvana investments. 4. Analysts highlight potential for growing vehicle sales and declining interest rates. 5. Carvana's rebound contrasts past bankruptcy concerns and shows market momentum.