Shares pop following blockbuster debut

Rivian Automotive shares ended the day up 29% in their debut Wednesday, giving the Amazon and Ford-backed electrical motor vehicle start out-up a marketplace valuation of $86 billion right after…

Elon Musk taunts Tesla rival Rivian after its blockbuster market debut

Tesla Motors CEO Elon Musk speaks to the media next to its Product S. Nora Tam | South China Morning Article | Getty Visuals Tesla CEO Elon Musk said large…