But why is market cap important and how should you use it? It's one of the best measures of a publicly traded company's size, which can tell you a lot about what to expect if you buy its stock.

The automaker's shares increased 8.2 percent to $321.22 on Friday, pushing its valuation beyond $1 trillion for the first ...

The Dow crossed 44,0000 for the first time ever as stocks were on track for their best week in a year on optimism that ...

While a second Trump presidency is seen as potentially negative for electric vehicles more broadly, his policies could ...

The S&P 500 on Friday was trading above 6,000 for the first time in history, while the Dow Jones Industrial Average was ...

Tesla Inc.’s market valuation topped $1 trillion on Friday, after a post-election rally lifted the electric-vehicle maker’s ...

The big Nvidia stock rally has pushed the company's market value to within striking distance of Apple's to make it the ...

Tesla shares are climbing Monday, after Elon Musk's electric-vehicle maker ended last week with a market value of more than ...

Small-cap stocks, supported by a pro-business Trump administration, could soar in the coming years, Fundstrat's Tom Less said ...