Carvana is seeing impressive growth rates in its business. But has the stock's rise gotten out of hand?Carvana (CVNA 1.20%) has been one of the market's biggest winners in 2025, with shares more than doubling year to date. A company that once appeared to be a risky leverage story is now posting record volumes and substantial profits.But Carvana's improving business fundamentals don't automatically make the stock a buy today. The business, which operates a leading e-commerce platform for buying and selling u ...