Stock Market Today: Dow Jones Sinks 400 Points As Yields Rise; Nvidia Falters As Tesla Rises On 'Golden Era' Hopes(Live Coverage)

Stock indexes struggled while yields rose in morning trades Wednesday, raising concerns that Wall Street may not have completely shrugged off fears about the market's current direction. The Dow Jones Industrial Average took a hit as two blue chips — insurance giant UnitedHealth (UNH) and artificial intelligence chip giant Nvidia (NVDA) — faltered on the stock market today. The Dow…