Tesla stock has now fallen by a fifth this year. Analysts say Elon Musk's involvement with DOGE is affecting sales and investors are taking notice.

Long a Wall Street favorite, Nvidia stock has struggled recently, falling 3% over the last six months, worse than the S&P 500 ...

Tesla's shares finished down 8.4 percent to $302.80, a drop that sliced $89 billion from its market value in a bruising ...