Wall Street's current valuations rank among the highest in history, driven by AI hype, stretched metrics, and fragile market breadth dominated by mega-cap stocks.

Berkshire Hathaway recently initiated a position in UnitedHealth Group stock. Shares of UnitedHealth have plummeted by ...

Berkshire acquired just over 5 million UnitedHealth UNH shares worth $1.57 billion as of June 30. The disclosure lifted UNH shares 12% on Aug. 15, 2025, with fresh stakes from David Tepper’s Appaloosa ...