Carvana shares plunged in premarket trading after the online used-car retailer issued full-year earnings guidance that may fall short of Wall Street expectations, as vehicle sales growth slowed and profit per car declined. The outlook raises questions about whether Carvana's rapid expansion can justify its high stock valuation. Still, sales growth slowed to its weakest quarter since 3Q24, while gross profit per unit declined, suggesting margin pressures remain a major problem. 2026 EBITDA guidance ($2.7-$3.0bn) in-line to below Street forecasts and likely disappointed investors seeking upside levers. The stock has remained range-bound for 13 months, repeatedly bouncing between resistance near $80 and support around $60.