Wall Street remains broadly optimistic about the current trillion-dollar group, but with valuations stretched for some mega-cap names, that optimism comes in degrees. For investors, this means the debate is less about whether these companies are high-quality, and more about how much upside remains after their historic runs.

It's blast-off for the newly minted public rocket company SpaceX (SPCX). SpaceX stock is up 9% in premarket trading on Tuesday, indicating an open of above $200 for the first time. At this level, SpaceX would open with a market cap of more than $2.

SpaceX soared past Amazon's $2.66 trillion market capitalization on Tuesday as its momentum continued in the wake of its record-setting IPO on the Nasdaq last week.

Market capitalization, often abbreviated as market cap, represents the overall value of a company’s shares that are publicly traded. It is determined by multiplying the current share price by the total number of shares in circulation. Investors often use ...

SpaceX held the biggest initial public offering of all time, but Wall Street may be expecting something even bigger from Elon Musk, the rocket company’s chief executive. Many of his fans and investors expect him to merge SpaceX with Tesla,

There is only one stock retail [investors] care about right now,” one research team wrote in a note to clients.

If you’re new to the stock market, you’ve likely been overwhelmed with all the stock market terms that investors use. In this article, we’re going to discuss what is market capitalization or market cap in stocks. Dy definition, market capitalization ...