Datadog, Trade Desk upgraded: Wall Street's top analyst calls

Needham downgraded CarMax (KMX) to Hold from Buy. The firm's previous bullish thesis was underwritten by a return to growth in units, leveraging their position as the industry leader in used auto, but a choppy macro recovery and intensifying competition from digital only players has pushed unit growth back into negative territory, the firm tells investors. RBC Capital also downgraded CarMax to Sector Perform from Outperform with a price target of $34, down from $59